TM

Service Manual

©2013 Young Chang Co., Ltd. All rights reserved. Kurzweil® is a product line of Young Chang Co., Ltd. Kurzweil®, Young
Chang®, V. A. S. T.®, and SP5-8™ are trademarks of Young Chang Co., Ltd. All other trademarks and copyrights are property
of their respective companies. Product features and specifications are subject to change without notice.

Part Number 910550-001 — May 2013

 CAUTION The lightning flash with the arrowhead symbol, within an equilateral
triangle is intended to alert the user to the presence of uninsulated
RISK OF ELECTRIC SHOCK "dangerous voltage" within the product's enclosure that may be of
DO NOT OPEN sufficient magnitude to constitute a risk of electric shock to persons.

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,

The exclamation point within an equilateral triangle is intended
DO NOT REMOVE THE COVER. to alert the user to the presence of important operating and
NO USER SERVICEABLE PARTS INSIDE. maintenance (servicing) instructions in the literature
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. accompanying the product.

IMPORTANT SAFETY & INSTALLATION INSTRUCTIONS

INSTRUCTIONS PERTAINING TO THE RISK OF FIRE ELECTRIC SHOCK , OR INJURY TO PERSONS‌
WARNING: When using electric products, basic precautions should 8.  The product should be connected to a power supply only of the
always be followed, including the following: type described in the operating instructions or as marked on the
product.
1.  Read all the Safety and Installation Instructions and Explanation
of Graphic Symbols before using the product. 9.  This product may be equipped with a polarized line plug (one
blade wider than the other). This is a safety feature. If you are
2.  This product must be grounded. If it should malfunction or unable to insert the plug into the outlet, contact an electrician to
break down, grounding provides a path of least resistance for replace your obsolete outlet. Do not defeat the safety purpose of
electric current to reduce the risk of electric shock. This product the plug.
is equipped with a power supply cord having an equipment-
grounding conductor and a grounding plug. The plug must be 10.  The power supply cord of the product should be unplugged
plugged into an appropriate outlet which is properly installed and from the outlet when left unused for a long period of time. When
grounded in accordance with all local codes and ordinances. unplugging the power supply cord, do not pull on the cord, but
grasp it by the plug.
DANGER: Improper connection of the equipment-grounding
conductor can result in a risk of electric shock. Do not modify the 11.  Care should be taken so that objects do not fall and liquids are
plug provided with the product – if it will not fit the outlet, have a not spilled into the enclosure through openings.
proper outlet installed by a qualified electrician. Do not use an
adaptor which defeats the function of the equipment-grounding 12.  The product should be serviced by qualified service personnel
conductor. If you are in doubt as to whether the product is properly when:
grounded, check with a qualified serviceman or electrician. A.  The power supply cord or the plug has been damaged;
3.  Do not use this product near water – for example, near a bathtub, B.  Objects have fallen, or liquid has been spilled into the
washbowl, kitchen sink, in a wet basement, or near a swimming product;
pool, or the like. C.  The product has been exposed to rain;
4.  This product should only be used with a stand or cart that is D.  The product does not appear to be operating normally or
recommended by the manufacturer. exhibits a marked change in performance;
5.  This product, either alone or in combination with an amplifier and E.  The product has been dropped, or the enclosure damaged.
speakers or headphones, may be capable of producing sound
levels that could cause permanent hearing loss. Do not operate 13.  Do not attempt to service the product beyond that described in
for a long period of time at a high volume level or a level that is the user maintenance instructions. All other servicing should be
uncomfortable. If you experience any hearing loss or ringing in referred to qualified service personnel.
the ears, you should consult an audiologist. 14.  WARNING: Do not place objects on the product’s power supply
6.  This product should be located so that its location or position cord, or place the product in a position where anyone could trip
does not interfere with its proper ventilation. over, walk on, or roll anything over cords of any type. Do not
allow the product to rest on or be installed over cords of any type.
7.  The product should be located away from heat sources such as Improper installations of this type create the possibility of a fire
radiators, heat registers, or other products that produce heat. hazard and/or personal injury.

RADIO AND TELEVISION INTERFERENCE

WARNING: Changes or modifications to the instrument not expressly • Reorient or relocate the receiving antenna.
approved by Young Chang could void your authority to operate the • Increase the separation between the instrument and the receiver.
instrument.
• Connect the instrument into an outlet on a circuit other than the
IMPORTANT: When connecting this product to accessories and/or one to which the receiver is connected.
other equipment use only high quality shielded cables.
• If necessary consult your dealer or an experienced radio/television
NOTE: This instrument has been tested and found to comply with the technician for additional suggestions.
limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. NOTICE
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This instrument This apparatus does not exceed the Class B limits for radio noise
generates, uses, and can radiate radio frequency energy and, if not emissions from digital apparatus set out in the Radio Interference
installed and used in accordance with the instructions, may cause Regulations of the Canadian Department of Communications.
harmful interference to radio communications. However, there is no AVIS
guarantee that interference will not occur in a particular installation. If
this instrument does cause harmful interference to radio or television Le present appareil numerique n’emet pas de bruits radioelectriques
reception, which can be determined by turning the instrument off and depassant les limites applicables aux appareils numeriques de la
on, the user is encouraged to try to correct the interference by one or class B prescrites dans le Reglement sur le brouillage radioelectrique
more of the following measures: edicte par le ministere des Communications du Canada.

SAVE THESE INSTRUCTIONS

ii
 IMPORTANT SAFETY INSTRUCTIONS
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this apparatus near water.
6) Clean only with dry cloth.
7) Do not block any of the ventilation openings. Install in accordance with the manufacturer’s instructions.
8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.
9) Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two
blades with one wider than the other. A grounding type plug has two blades and a third grounding
prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit
into your outlet, consult an electrician for replacement of the obsolete outlet.
10) Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles,
and the point where they exit from the apparatus.
11) Only use attachments/accessories specified by the manufacturer.
12) Use only with a cart, stand, tripod, bracket, or table specified by the manufacturer,
or sold with the apparatus. When a cart is used, use caution when moving the cart/
apparatus combination to avoid injury from tip-over.
13) Unplug this apparatus during lightning storms or when unused for long periods of
time.
14) Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate
normally, or has been dropped.
15) Allow adequate ventilation for the power adapter. Do not hide it under a carpet or behind a curtain or
place it in an enclosed space where heat buildup can occur.
Warning: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. Do
not expose this equipment to dripping or splashing and ensure that no objects filled with liquids, such as vases,
are placed on the equipment.
To completely disconnect this equipment from the AC Mains, disconnect the power supply cord plug from
the AC receptacle.

iii
Kurzweil International Contacts
Contact the Kurzweil office listed below to locate your local Kurzweil representative.

US Customers:

American Music & Sound

22020 Clarendon Street, Suite 305
Woodland Hills, CA 91367

Tel: 800-431-2609
Fax: 818-597-0411
Email: Info@AmericanMusicAndSound.com

Customers outside the US:

Young Chang Co., LTD.

9th Floor, Bldg 102, I-Park,
Jeongja-Dong, Bundang-Gu, Seongnam-Si, Gyeonggi-Do
463-859 South Korea

Tel: +82 31 786 7900

www.kurzweil.com

WORLD-WIDE TECHNICAL SUPPORT

Email: support@kurzweil.com.

iv
Table of Contents

Kurzweil International Contacts........................................................................................................................iv

Chapter 1 Introduction
Notes, Cautions, Warnings........................................................................................................................1-1
Front Panel Features...........................................................................................................................................1-2
Shift, Sw, and Zone Buttons and Control Sliders....................................................................................1-2
Mode and Function Buttons......................................................................................................................1-3
Navigation....................................................................................................................................................1-4
Category Buttons and KB3 LED................................................................................................................1-4
Double Press Buttons..................................................................................................................................1-5
Pitch and Mod Wheels................................................................................................................................1-5
Rear Panel Features............................................................................................................................................1-6

Chapter 2 Printed Circuit Boards

Function Overview.............................................................................................................................................2-1
Engine PCB Function Summary................................................................................................................2-1
General...................................................................................................................................................2-1
CPU........................................................................................................................................................2-2
Memory.................................................................................................................................................2-2
Scanning................................................................................................................................................2-3
Synthesis ASIC.....................................................................................................................................2-3
D-to-A converter...................................................................................................................................2-3
USB Controller......................................................................................................................................2-4
MIDI (5-pin) Interface..........................................................................................................................2-4
Voltage Regulators...............................................................................................................................2-4
Front Panel PCBs Function Summaries...................................................................................................2-5
Right and Left Front Panel PCBs.......................................................................................................2-6
ScanPort interface to front panel LED indicators............................................................................2-6
ScanPort interface to front panel buttons.........................................................................................2-6
Right Front Panel PCB.........................................................................................................................2-6
ScanPort interface to the keyboard....................................................................................................2-6
MIDI In/Out connector interface......................................................................................................2-6
DC power input jack and voltage regulators...................................................................................2-7
LCD contrast voltage adjuster............................................................................................................2-7
Left Front Panel PCB...........................................................................................................................2-7
Switch Pedals and CC Pedal connectors and interface..................................................................2-7
ScanPort interface to Pitch and Mod wheels...................................................................................2-8
Volume Control and control sliders..................................................................................................2-8
Audio differential amplifiers for Left/Right output jacks.............................................................2-8
Amplifier for Headphones jack..........................................................................................................2-8
ScanPort analog multiplexor..............................................................................................................2-8
Audio Muting circuits.........................................................................................................................2-9
Automatic Shutdown (ERP Control) PCB......................................................................................................2-9

v
Table of Contents


Chapter 3 Diagnostics
Diagnostic Tests..................................................................................................................................................3-1
Entering Diagnostics..........................................................................................................................................3-1
Display and Front Panel Buttons..............................................................................................................3-2
Test Results...................................................................................................................................................3-2
Diagnostic Test Modes.......................................................................................................................................3-2
Run Once......................................................................................................................................................3-2
Loop..............................................................................................................................................................3-2
Continuous...................................................................................................................................................3-2
Description of Tests............................................................................................................................................3-3
SDRAM Refresh...........................................................................................................................................3-3
MIDI Loopback............................................................................................................................................3-3
Internal Flash...............................................................................................................................................3-3
MARA Validity............................................................................................................................................3-3
MARA Delay RAM.....................................................................................................................................3-4
MARA Sound ROM....................................................................................................................................3-4
Audio Output..............................................................................................................................................3-4
Scanner DIAG..............................................................................................................................................3-5
Scanner DIAG tests..............................................................................................................................3-5
Burn-in Test..................................................................................................................................................3-6

Chapter 4 Disassembly/Assembly
Introduction.........................................................................................................................................................4-1
Notes, Cautions, Warnings........................................................................................................................4-1
Cables, Connectors......................................................................................................................................4-1
Required Tools and Materials....................................................................................................................4-1
Top Enclosure......................................................................................................................................................4-2
Opening the SP5-8.......................................................................................................................................4-2
Removing the Endcaps...............................................................................................................................4-3
Removing the Top Enclosure.....................................................................................................................4-3
Replacing the Top Enclosure.....................................................................................................................4-4
Replacing the Endcaps...............................................................................................................................4-5
Closing the SP5-8.........................................................................................................................................4-5
Removing the Engine PCB.........................................................................................................................4-6
Replacing the Engine PCB.........................................................................................................................4-7
Removing the Right Front Panel PCB......................................................................................................4-8
Replacing the Right Front Panel PCB.......................................................................................................4-9
Removing the LCD...................................................................................................................................4-10
Replacing the LCD....................................................................................................................................4-10
Removing the Left Front Panel PCB.......................................................................................................4-10
From the Rear Panel...........................................................................................................................4-10
From the Front Panel.........................................................................................................................4-10
Inside the Top Enclosure................................................................................................................... 4-11
Replacing the Left Front Panel PCB.......................................................................................................4-12
On the Rear Panel.......................................................................................................................4-12
On the Front Panel......................................................................................................................4-12

vi
 Table of Contents


Bottom Enclosure..............................................................................................................................................4-13
Removing the Wheels Assembly............................................................................................................4-13
Replacing the Wheels Assembly.............................................................................................................4-14
Removing the Keyboard Assembly........................................................................................................4-14
Replacing the Keyboard Assembly.........................................................................................................4-15
Removing Keys..........................................................................................................................................4-15
Replacing Keys..........................................................................................................................................4-17
Keyboard Contact PCBs...........................................................................................................................4-18
Removing the Lo Contact PCB.........................................................................................................4-18
Replacing the Lo Contact PCB.........................................................................................................4-18
Removing the Mid Contact PCB......................................................................................................4-19
Replacing the Mid Contact PCB......................................................................................................4-19
Removing the Hi Contact PCB.........................................................................................................4-20
Replacing the Hi Contact PCB.........................................................................................................4-20
Removing the Keyboard Contact Strips................................................................................................4-21
Replacing the Keyboard Contact Strips.................................................................................................4-21

Chapter 5 Troubleshooting & Maintenance

Introduction.........................................................................................................................................................5-1
Surface-Mount Devices..............................................................................................................................5-1
Cables, Connectors......................................................................................................................................5-1
Boot Loader.........................................................................................................................................................5-2
Entering the Boot Loader..................................................................................................................................5-2
Resets....................................................................................................................................................................5-2
Software Updates...............................................................................................................................................5-3
Power Problems..................................................................................................................................................5-4
Dead: LCD, LEDs not lit............................................................................................................................5-4
Audio Problems..................................................................................................................................................5-4
No Audio......................................................................................................................................................5-4
Front Panel Problems.........................................................................................................................................5-5
LCD not lit, LEDs are lit.............................................................................................................................5-5
LCD, LEDs not lit, buttons, or controllers not working........................................................................5-5
Keyboard Problems............................................................................................................................................5-6
Dead Keyboard............................................................................................................................................5-6
Dead Note(s) or no velocity sensitivity....................................................................................................5-6
One or More in a Section.....................................................................................................................5-6
Interconnect Diagram........................................................................................................................................5-7

Chapter 6 Replacement Parts

Printed Circuit Boards and Assemblies...................................................................................................6-1
Keyboard Assembly....................................................................................................................................6-1
Right Front Panel PCB................................................................................................................................6-2
Left Front Panel PCB...................................................................................................................................6-2
Miscellaneous...............................................................................................................................................6-2

vii
Table of Contents


Chapter 7 Schematics
Engine PCB­—SH7203 CPU, Memory, and Debug UART Header (1 of 5).................................................7-3
Engine PCB—MARA (2 of 5)............................................................................................................................7-4
Engine PCB—MARA Clock, Delay Memory, ScanPort, CPLD (3 of 5)......................................................7-5
Engine PCB—Sound ROM, LCD INTF, Audio Outputs, USB I/F (4 of 5).................................................7-6
Engine PCB—Power Circuitry, Test Headers , Reset (5 of 5).......................................................................7-7
Front Panel Right PCB—Button, LED (1 of 2)................................................................................................7-8
Front Panel Right PCB (2 of 2)..........................................................................................................................7-9
Front Panel Left PCB (1 of 2)).........................................................................................................................7-10
Front Panel Left PCB (2 of 2)........................................................................................................................... 7-11
Automatic Shutdown (ERP Control) PCB....................................................................................................7-12

viii
Chapter 1
Introduction
This chapter provides the service technician with a layout of the control and rear panel features,
as well as a brief explanation of their functions. For complete instructions, consult the SP5-8
Musician’s Guide.

Notes, Cautions, Warnings

Please pay special attention to all Notes, Cautions, and Warnings symbols used throughout this
manual.

A brief description of these symbols follows:

Note: Provides additional information, emphasizes specific instructions, and indicates

differences between models.

Caution: Instructs you to proceed cautiously so that damage does not occur to the unit or
individual components.

Warning: Alerts you so that damage does not occur to yourself, others, or external devices.

1-1
Introduction
Front Panel Features

Front Panel Features

Zone &
Programmable
Buttons Mode &
Function LCD Category KB3
Shift Buttons Contrast Buttons LED
Button
& LEDs Display

Alpha
Wheel
Control Sliders Value Buttons

Channel/Parameter
Buttons

Shift, Sw, and Zone Buttons and Control Sliders

Master Volume slider—Adjusts the overall volume.

Setup Zone buttons—Pressing a Zone button will mute or unmute the zone. Zones are the
independent regions of the keyboard that make up a Setup.

Sw button—Depending on the current mode (Program or Setup), the Sw button can be

programmed to do a variety of functions.

1-2
 Introduction
Front Panel Features

Control sliders, Shift button and LEDs—These sliders can be assigned to send MIDI continuous
controller values. Each slider can control three separate functions giving you access to 15 MIDI
continuous controllers. Think of this as three rows of five sliders. Press the Shift button to select a
row of sliders. The lit LED above the Shift button indicates the active row.

While playing KB3 programs, the first nine sliders act like tonewheel organ drawbars. The
remaining six can perform other functions.

Mode and Function Buttons

Program—Press the Program button to enter Program Mode to select and play different
programs.

Setup—Press the Setup button to enter Setup Mode to select different configurations of
programs, controller and MIDI channel assignments.

Edit Setup—Press the Edit Setup button to enter Edit Setup Mode to edit and create user Setups.

Global—Press the Global button to enter Global Mode to edit parameters that affect the entire
unit. In Global Mode you can also restore factory defaults with a hard reset.

Save—Depending on the current mode, press the Save button to save changes to the current
Program or Setup (a user program in Program Mode, a copy of the current setup in Setup Mode,
and the currently edited setup in Edit Setup Mode).

Split—Press the Split button to perform the Split function. The Split Function allows you to split
Programs and Setups such that keys in one region of the keyboard produce different sounds than
another region.

Layer—Press the Layer button to perform the Layer function. The Layer Function allows you to
layer Programs and Setups such that more than one sound can be produced by striking one key.

Transpose – and Transpose + buttons—Press the Transpose – button to transpose the current
program or setup down by one semitone. Press the Transpose + button to transpose the current
program or setup up by one semitone.

Octave—If the Octave button is active, pressing the Transpose + or Transpose – buttons
will transpose the current Program or Setup in octaves (+/– 12 semitones). The maximum
transposition value is +/–36.

1-3
Introduction
Front Panel Features

Navigation

LCD—Twenty character, 2 line liquid crystal display.

Previous—Press the Previous button to select the previous or lower value or item.

Next—Press the Next button to select the next or higher value or item.

Chan / Param Up and Down—Use these buttons to move through the list of available parameters
for the current mode.

LCD Contrast—Turn this rotary potentiometer to adjust the LCD for the best viewing angle.

Alpha Wheel—Turn the Alpha Wheel to increase or decrease a value by one or several
increments.

Category Buttons and KB3 LED

Category buttons—There are 24 Category buttons. Twenty buttons to select Programs by

instrument type, two buttons (User and All) that allow you to scroll through Programs and
Setups, and two buttons (Keypad and Enter) to select and enter the alphanumeric data. Note that
on each button the secondary alphanumeric function is printed in white ink.

KB3 LED—This LED is lit when the current Program is a KB3 Program.

1-4
 Introduction
Front Panel Features

Double Press Buttons

Certain buttons when simultaneously pressed with another button provide secondary functions.
These are called double press buttons. A description of each of the SP5-8’s double press buttons
begins below.

Reset Transposition—Simultaneously press the Transpose – and Transpose + buttons to restore

the current program or setup to no transposition.

Value Jump—Simultaneously press the Previous and Next buttons to jump to the next group of
items (Program, Setup, and Edit Setup Mode).

Paramenter Jump—Simultaneously press the Chan / Param Up and Down buttons to jump a
specific parameter (Edit Setup Mode only).

MIDI Program Change—Simultaneously press the Voices and Mallets category buttons to enter
the MIDI Program Change Function page and send MIDI Program changes to any sound module
connected in a MIDI chain to the SP5-8.

Program Demo—Simultaneously press the Hybrid and Misc category buttons to enter Program
Demo Mode and play a demo song for the current Program.

Demo—Simultaneously press the User and All category buttons to enter Demo Mode and listen
to a demo sequence.

Panic—Simultaneously press the Keypad and Enter category buttons to send an All Notes/All
Controllers Off message to the SP5-8 and connected modules.

Pitch and Mod Wheels

Pitch and Mod wheels—Use the Pitch wheel to vary the pitch up or down. Assign the Mod
wheel to a parameter that alters some aspect of the sound (e.g., vibrato, filter depth) when
changed.

1-5
Introduction
Rear Panel Features

Rear Panel Features

DC Power MIDI Ports Headphones
Power Pedal Jacks Jack
Switch Jack

USB Port Audio Jacks

DC Power Jack—Connect the DC Adapter to this jack.

USB Port—Connect a USB cable to this port to send and receive MIDI, manage user data or to
connect to a computer for system updates.

MIDI In & Out Port—Use the MIDI In and Out ports to connect the SP5-8 to other MIDI devices
to receive and send MIDI data.

SW Pedal (Sustain Pedal)—Use these two 1/4” jacks to connect switch pedals that can be
assigned to control sustain, sustenuto, and on/off functions.

CC Pedal—Use this 1/4” jack to connect a continuous controller pedal and assign it to control
volume, expression, and continuous control functions.

Audio Out—Use these 1/4” jacks to connect the SP5-8 to external audio equipment.

Headphones—Use this 1/4” stereo headphone jack to connect stereo headphones to listen to the
SP5-8.

1-6
Chapter 2
Printed Circuit Boards

Function Overview
The SP5-8 contains three main printed circuit boards (PCB): the Engine PCB, the Right Front
Panel PCB, and the Left Front Panel PCB.

To greatly generalize:

The Engine PCB contains everything concerning sample playback, audio effects, and the
functions of the SP5-8’s operating system.

The Right and Left Front Panel PCBs help the Engine PCB communicate with the SP5-8’s
buttons, LEDs, sliders, Spin knob, Pitch and Mod wheels, pedals, keyboard, and rear panel
connectors. They also contain the power supply and audio amplifier circuits.

Engine PCB Function Summary

The SP5-8’s Engine PCB performs the following functions:

1.  CPU for the entire system

2.  Synthesis and effects for all of the sounds
3.  Sample ROM
4.  D-to-A converter for the synthesizer
5.  Non-volatile storage of all user data
6.  Scanner for front panel buttons, LEDs, sliders, Spin knob, and the keyboard
7.  USB controller
8.  MIDI interface, both 5-pin and USB
The following function summary descriptions reference the PC3LE Engine PCB, Rev F Ver 1,
schematic circuit drawings (Chapter 7, pages 7-3 through 7-7).

General
The Engine PCB contains the system CPU (a 200MHZ Renesas SH2A integrated
microcontroller), sound synthesis ASIC (Kurzweil MARA), and player control/user interface
scanning. The following paragraphs give a brief summary of these major functions and
associated functional blocks.

2-1
Printed Circuit Boards
Function Overview

Boot Sequence
The SP5-8 uses a modern tiered memory architecture and boots much like a desktop
computer. The sequence is essentially:

1.  The Right Front Panel PCB, which contains the power supply, produces a signal
(PWRUPRST_L) that goes high when the main DC power (+5V) has been stable for
approximately 0.5 seconds.
2.  The CPU (U1) is enabled and begins fetching instructions from Boot Flash (U4), which
contains the initial bootup code.
3.  After initialization, the bootup code checks the contents of the NAND Flash, U3. U3 is
essentially a solid-state disk drive that acts like the hard disk in a desktop computer.
If it is formatted and has the necessary files installed, the “second level” boot loader
program is read into RAM (U2) and run. Otherwise a more limited function boot loader
program, also in the Boot Flash (U4), is run. (Normally the latter should only happen at
the factory before installing the OS for the first time.)
4.  The second level boot loader then loads the operating system software and soundware
“object data” from U3. The LCD will show “Loading...” during this time.
5.  Bootup is now complete and the unit is ready to play.

Note: Step 4 is aborted if the Shift button is held down during bootup. The boot loader
can then be used to update the operating system software and soundware objects or run the
diagnostics.

CPU
The CPU (U1, page 1, zone C4) is a Renesas SH7203, which is a member of the SH-2A family.
This highly efficient, low-power, RISC processor is very effective in musical instruments.

X1 is the CPU clock crystal that operates at 16.67MHz. The CPU multiplies that by four
to produce the 66.67MHz Bus Clock (called SDRAM_CLK, U1-50) and by 12 to make the
200MHz core clock.

Reset to the CPU (U1-59) comes from the reset circuit on page 5, zone A4. This circuit receives
Power OK from the Right Front Panel PCB via J23.

Memory
The CPU memory is located along the right side of page 1. As previously described, the CPU
initially boots from Boot Flash, U4. This is non-volatile memory that is programmed once at
the factory. However, if a special Boot EPROM Module is plugged onto J1, then the CPU will
boot from it instead. When Engine PCBs are manufactured, the factory uses this module to
load U4. If the data in U4 becomes corrupted and the CPU cannot boot, the EPROM module
can be used to reload U4.

2-2
 Printed Circuit Boards
Function Overview

U3 is a NAND Flash chip, which is very similar to what is used in memory cards and USB
“thumb” drives. It holds the operating system code, sound programs and setups, and user
data (user sound programs and MIDI sequences). The capacity is 64MB.

U2 is system RAM. After bootup, the operating software executes from system RAM. It also
holds currently used sound programs and MIDI sequences.

Scanning
Software in the operating system also performs scanning of the player controls (keyboard and
pedals) and the user interface (UI) controls (buttons, LEDs, Spin knob, sliders, and wheels).
This is accomplished through a simple, Kurzweil standardized, interface called ScanPort (J7,
page 3, zone D1). Most of the circuits for scanning are actually on the Right and Left Front
Panel PCBs; only a couple of buffers (U6, U8), an analog amplifier (U9), and decoding logic
(U11) are on the Engine PCB. See the Right and Left Front Panel PCB descriptions for more
details about ScanPort operation.

Synthesis ASIC
Page 2 has the MARA synthesis ASIC, U5. This proprietary, Kurzweil designed VLSI chip
integrates the following synthesizer circuits:

•  64 sample playback channels, each with independent playback rate

•  64 amplitude envelope blocks
•  256 DSP processors, each with independent envelope
•  Effects processor with 16 processing blocks
•  Patching array for interconnecting the above resources
•  Digital audio formatting circuits

The instrument sound samples are stored in Sound ROM (page 4, zone 5D). The standard
SP5-8 has 64MB (only U13 installed) of Sound ROM. Other products using the same Engine
PCB may have additional Sound ROM installed at U14.

The effects processor also uses an external Delay RAM (U12, page 3, zone A4). Pops, audible
crashing sounds, and other extraneous noises are often caused by defective Delay RAM or
connections to it.

D-to-A converter
U15 (page 4, zone D1) is a digital-to-analog converter. It connects directly to MARA on the
digital side and directly to the Audio Out header (J11) on the analog side. Amplifiers and
reconstruction low-pass filters are on the Left Front Panel PCB. Although U15 is an 8-channel
DAC, only the first two channels (L1 and R1) are used in the SP5-8.

A separate MUTE signal comes directly from the CPU to suppress pops and clicks during
power-up and power-down. MUTE must have a low logic level (less than 0.8V) to enable
audio on the Left Front Panel PCB.

2-3
Printed Circuit Boards
Function Overview

USB Controller
The CPU has an integrated USB controller that can be either Master or a Slave but not at the
same time. Switching circuits (page 4, zone B1) switch between the two functions. In the
SP5‑8, the actual USB connector is on the Right Front Panel PCB and connects to the Engine
PCB by two cables.

MIDI (5-pin) Interface

The CPU has an integrated UART configured for standard MIDI In/Out. The actual 5-pin
MIDI connectors and interface circuits are on the Right Front Panel PCB. J31 carries standard
MIDI signals to and from the CPU.

Voltage Regulators
The Right Front Panel PCB brings in the single +15V power voltage from the AC adapter and
converts it to +5V for digital circuits and +/-8V for the analog circuits. These voltages enter
the Engine PCB on J23 (page 5, zone D2). Note that although the analog power signal names
are +12V and -12V, the actual voltage level is +8V and approximately -10V.

The various large chips on the Engine PCB require several different power supply voltages:
+3.3V (VCC33), +2.5V (VCC25), +1.8V (VCC18), and +1.2V (VCC12). All of these voltages are
regulated by integrated linear voltage regulators.

U23: +5V (VCC) is the source voltage for the VCC33 regulator.

Powers the CPU, MARA chip, and most of the other digital circuits.
U24: VCC33 is the source voltage for the VCC25 regulator.

Powers the Delay RAM for the effects processor in MARA.

U25: VCC33 is the source voltage for the VCC18 regulator.

Powers MARA’s core logic.

U26: VCC33 is the source voltage for the VCC12 regulator.

Powers the CPU core logic.

2-4
 Printed Circuit Boards
Function Overview

Front Panel PCBs Function Summaries

The SP5-8 Front Panel PCBs perform the following functions:

1.  ScanPort interface to front panel LEDs

2.  ScanPort interface to front panel buttons
3.  ScanPort interface to the keyboard
4.  MIDI In/Out connector interface to logic level signals
5.  DC power entry socket, power switch connector, and voltage regulators
6.  USB connector interface
7.  LCD contrast voltage adjuster
8.  CC Pedal and Switch Pedals interface
9.  ScanPort interface to Pitch and Mod wheels
10.  ScanPort interface to the Volume control and control sliders
11.  Audio differential amplifiers for Left/Right output jacks
12.  Amplifier for Headphones jack
13.  ScanPort analog multiplexor
14.  Audio Muting circuits
The following function summary descriptions reference the SP5-8 Right Front Panel PCB,
Rev A, schematic circuit drawings (Chapter 7, pages 7-8 and 7-9) and the SP5-8 Left Front
Panel PCB, Rev. A, schematic circuit drawings (Chapter 7, pages 7-10 and 7-11).

In the SP5-8, the main CPU on the Engine PCB also performs scanning of the keyboard, LEDs,
and controls. This is done through the ScanPort connector, a simple, Kurzweil standardized,
CPU independent interface for scanning.

The Right Front Panel PCB and the Left Front Panel PCB help the Engine PCB communicate
with the SP5‑8’s LEDs, buttons, sliders, Spin knob, power supply, keyboard, wheels, and
rear panel connections. Most of the subsystems on the Right Front Panel PCB and Left Front
Panel PCB connect to the ScanPort. The Right Front Panel PCB and the Left Front Panel PCB
connect via the Control Panel Bridge connectors.

2-5
Printed Circuit Boards
Function Overview

Right and Left Front Panel PCBs

ScanPort interface to front panel LED indicators

(page 1 zone C5–D5)
The 25 LEDs on Right Front Panel PCB are in a 6 column 7 row matrix. The column select
shift register (U1) drives the next column each time the ScanPort writes new data into the
LED row register (U3). A new scan begins when the ScanPort RES signal is low during a row
register write cycle. Scan rate is approximately 100Hz (10mS).

The column select shift register outputs are current boosted by transistors Q1–Q5 and Q23.
LEDs light when the column they are connected to is low and the row is high.

The 18 LEDs on the Left Front Panel PCB are in a 5 column 4 row matrix. Their signals are
passed through the Control Panel Bridge connector to the Right Front Panel PCB.

ScanPort interface to front panel buttons

(page 1 zone B5)
The 26 buttons on Right Front Panel PCB are in a 6 column 5 row interface. The columns are
shared with the LEDS. The status of the rows is driven back to the ScanPort by buffer U4. A
pressed button will send back a zero for its row position when its column select line is low.
Buttons that may be pressed simultaneously are never on the same row.

The 18 buttons on the Left Front Panel PCB are in a 6 column 3 row matrix. Their signals are
passed through the Control Panel Bridge connector to the Right Front Panel PCB.

Right Front Panel PCB

ScanPort interface to the keyboard

(page 2 zone B1–D3)
The keyboard connects to J3 (treble half) and J5 (bass half). Bass is a 10 column by 8 row
matrix (40 keys, 80 switches) and treble is a 12 column by 8 row matrix (48 keys, 96 switches).
These are combined into a 22 column by 8 row matrix for 88 keys total.

Shift registers U9, U8, U5 drive the columns low one at a time. Buffer U12 transmits the state
of the rows back to the ScanPort. Each time a row is read, the column shift registers advance
one column. A new scan begins when the ScanPort RES signal is low during a keyboard row
read cycle. Scan rate is approximately 4KHz (250uS).

MIDI In/Out connector interface

(page 2 zone D4–D6)
U6 is the MIDI In current loop receiver. Either a PC910 or a 6N138/6N139 may be used. The
components around U6 will be different according to the Usage Table. U7-A and U7-B drive
the MIDI Out connector current loop.

2-6
 Printed Circuit Boards
Function Overview

DC power input jack and voltage regulators

(page 2, zones B4–B6)
J7 receives +15V 1.0A power from the external power adapter. L4 and L5 provide RFI filtering
and J6 connects to the power switch.

U11 is a switching regulator which provides +5V at high efficiency for on-board circuits and
the Engine PCB. Note the minimum load spec of 0.25A. Typical load is about 1.0A. U10 is a
low current linear regulator which supplies +10V to the audio circuits.

-10V for the audio circuits is created by a charge pump (D36, D37, C13, C14) from the high-
power 15V rectangular wave produced by the switching regulator. R27 limits surge currents
at startup and ripple currents in the charge pump filter. Even though -10V is not strictly
regulated, it is very quiet in the audio range and suitable for analog use. Typical voltage
range is -8V to -12V.

USB connector interface

(page 2, zone A5)
The USB jack connects directly to the USB Control and Data cables that go to the Engine
PCB. Note that the Data cable must be constructed from special USB rated shielded cable for
reliable operation in high speed mode.

LCD contrast voltage adjuster

(page 2, zone C5)
VR1 is the front panel contrast control for the LCD. Resistors R25 and R119 set the voltage
range and center value so that optimum contrast is achieved near the center of the control’s
range. Since LCD operating voltages vary by vendor, the values in a particular unit may
be different from those in the schematic. Conversely, using a different vendor’s LCD may
require a change in one or more of these resistors.

Left Front Panel PCB

Switch Pedals and CC Pedal connectors and interface

(page 2, zone C6–D6)
J13 (Sustain) and J18 (Sustentuto) are the switch pedal inputs. The switch pedals close when
pressed. Their signals enter the Analog Multiplexor described below.

J12 is the Expression Pedal jack and expects a 3-terminal potentiometer with the wiper on
the tip (pin 2). The 5.1V reference voltage is supplied through a current limiter (Q6 and R37)
to the ring (pin 3). R45 pulls the wiper up to 5V when no pedal is plugged in thus ensuring
stable full volume. The wiper voltage is filtered and overvoltage protected by R44, C31, D39,
and D40.

2-7
Printed Circuit Boards
Function Overview

ScanPort interface to Pitch and Mod wheels

(page 1, zone B4–C5)
The pots in the Pitch/Mod wheel assembly turn through only a small part of their
rotation range. U20 and associated components amplify the resulting small voltage swing
approximately 4X to make a full 0-5V swing for the ScanPort analog multiplexor (described
below). Additionally VR3 is used to center the range of the pitch wheel. If the scanner
diagnostic reports a center reading less than 120 or more than 136, VR3 should be adjusted to
make it as close to 128 as possible.

Volume Control and control sliders

(page 2, zone D2–D6)
These sliders connect between the +5.1V reference voltage and ground. Each wiper is filtered
by a 0.1uF capacitor and the resulting voltage passed to the ScanPort analog multiplexor
described below.

Audio differential amplifiers for Left/Right output jacks

(page 2, zone A5–C1)
Stereo audio from the Engine PCB comes in as a low-level, unfiltered, balanced signal. U18A
(left) and U18B (right) lowpass filters and amplifies this and converts it to single-ended left
and right signals with typically 50dB of common-mode rejection. U19A and U19B phase-
inverts the single-ended signal then present that plus the non-inverted signal to the output
jacks (J14 and J15) as a balanced output signal. Transistors Q7–Q10 mute the outputs during
power-up and power-down to prevent clicks. D43, D44, D47–D52 protect against static
discharge damage.

Amplifier for Headphones jack

(page 2, zone A1–A2)
U17 amplifies the single-ended left and right audio signals 2X then presents them to J16 for
driving headphones. U17 is a special high-current op-amp to better drive low-impedance
headphones. Q11 and Q12 mute the phones during power transitions while D53–D56 protect
the phones amplifier from static discharge.

ScanPort analog multiplexor

(page 2, zone D2–D4)
There are 8 different sources of analog voltage that are selected one at a time by U15 then
passed to the balanced output amplifier U14 which then drives the selected source voltage
through the Control Panel Bridge connector to the ScanPort on the Right Front Panel PCB.
The balanced outputs are symmetrical around 1/2 of the reference voltage as set by R42, R46,
and C32. U16 holds the address of the analog voltage being read during A-to-D conversion
by the Engine PCB.

2-8
 Printed Circuit Boards
Automatic Shutdown (ERP Control) PCB

Audio Muting circuits

(page 1 Zone A3–A6)
Each of the 6 muting transistors requires an isolated current source to turn them on and
prevent crosstalk and distortion when off. Q13–Q19 provide this function and are driven
together by Q20. Q21 and Q22 sense the incoming DC voltage and ensure that muting is
activated whenever the incoming voltage is less than approximately 10V. The MUTE signal
from the Engine PCB further extends the mute time at power up until the sound generator
circuits are initialized and stable.

Automatic Shutdown (ERP Control) PCB

The following function summary descriptions reference the ERP Control PCB, Rev D,
schematic circuit drawing (Chapter 7, page 7-12).

Instruments imported into Europe beginning in 2013 must, by law, automatically shut down
after a period of inactivity. SP5-8 units exported to Europe implement this by means of a
small Automatic Shutdown PCB installed on the rear panel near the DC Power jack. This PCB
will interrupt DC power to the Right Front Panel PCB if the unit fails to send any MIDI data
for more than approximately four hours. As required by the ERP regulation, this function
must be enabled by default from the factory however the user may disable it.

This PCB consists of a timer, a MIDI activity sensor, and a switch transistor. It measures
about 30x50mm and is mounted above the MIDI jacks. Two cables connect to the Right Front
Panel PCB and one to the power switch. The timer is reset when power is first turned on and
whenever a keystroke or sound program change causes MIDI to be sent. The timer may be
defeated by pressing the Defeat switch so that it pops out.

2-9
Printed Circuit Boards
Automatic Shutdown (ERP Control) PCB

2-10
Chapter 3
Diagnostics

Diagnostic Tests
The following lists the diagnostic tests available for the SP5-8.

•  SDRAM Refresh
•  MIDI Loopback
•  Internal Flash
•  MARA Validity
•  MARA Delay RAM
•  MARA Sound ROM
•  Audio Output
•  Scanner Diag
•  Burn-in Test

Entering Diagnostics
is one of the available menu options included in the SP5-8 Boot Loader.
The following procedure describes entering the boot loader to run the diagnostic tests. The
boot loader’s other available menu options and their procedures can be found in Chapter 5
beginning on page 5-2.

1.  Press and hold the Shift button and apply power to the unit. When appears
in the display, release the Shift button. You should see and the
version number momentarily in the display then first available Boot Loader menu
option, .
2.  Press the Chan / Param Up or Down button to move through the menu options until the
display shows .
3.  Press the Next button to enter the diagnostic test menu.
4.  The display shows the first test in the diagnostic menu, .

3-1
Diagnostic Test Modes
Display and Front Panel Buttons

Display and Front Panel Buttons

In the Diagnostics menu, the display shows the currently selected test, test modes, actions,
and test results.

Press the Chan / Param Up or Down button to move through the available tests. To select a
test, press the Next button. Press a Chan / Param Up or Down button to select the Test Mode:
Run Once, Loop or Continuous. Then press the Next button to begin the test. While some
tests are processing, shows in the display.

Some tests have additional test options. In this case, use the Chan / Param Up or Down
button to move through the available test options and press the Next button to choose the
option and run the test. To return to the previous menu or option, press the Previous button.

To return to the Boot Loader, press the Previous button.

Test Results
At the completion of an individual test, the display shows the results of the test; the test name
and for a passed test or for a failed test. When a test fails, additional lines of
test results may scroll across the display. Use the Chan / Param Down button to review each
line of test results.

Diagnostic Test Modes

Run Once
The Run Once test mode allows you to select and run an individual test. With
selected in the display, press the Next button to select and run the test once.

At the completion of a test, whether pass or fail, press the Previous button to exit the test and
return to the Diagnostics menu.

To exit the Diagnostics menu, press the Previous button to return to the Boot Loader.

Loop
Loop continuously runs an individual test. The display continuously displays the number of
tests performed in the run field ( ), and displays the number of failed tests performed in
the fail field, ( ).

Loop stops if a failure is detected.

Continuous
Continuous is the same as Loop, but does not stop if a failure is detected. Continuous runs
the selected test until you press the Previous button.

3-2
 Description of Tests
SDRAM Refresh

Description of Tests
SDRAM Refresh
This test verifies the write/read functionality and accuracy of the SDRAM chip (U2) attached
to the microprocessor, SH7203 (U1).

A failure of this test indicates a problem with the SDRAM chip or associated circuitry on the
Engine PCB.

MIDI Loopback
This test performs a loop-back of the serial port by sending a 23-byte pattern over the
external MIDI link. This test requires a MIDI loop (a MIDI cable that connects the MIDI Out
jack to MIDI In jack on the SP5-8‘s rear panel).

If a MIDI cable is not connected between SP5-8‘s two MIDI jacks, the display scrolls
.

A failure of this test could be caused by failure of the serial port, other MIDI circuitry, or a
problem on the Engine PCB.

Internal Flash
This test verifies the manufacturer ID and the size of the NAND Flash installed. The test
then writes and reads back one or more blocks not occupied by the file system. This test also
indicates if the NAND Flash is formatted or unformatted.

A failure of this test may indicate a problem with the microprocessor (U1), NAND Flash (U3),
CPLD (U11), or related circuitry on the Engine PCB.

MARA Validity
Note: Throughout this manual many references are made to the MARA IC. MARA is the
name given to the Kurzweil Custom Sound IC.

This test verifies the proper content of certain read-only registers and the read/write accuracy
of certain read/write registers on MARA. It also writes and reads back the various register
blocks in MARA that are implemented as RAM cells.

A failure of this test may indicate a problem with the microprocessor (U1), MARA (U5), or
related circuitry on the Engine PCB.

3-3
Description of Tests
MARA Delay RAM

MARA Delay RAM

This is a write/read test to check the Delay RAM connected to MARA. The Delay RAM test
first checks address and databus connectivity and then reports which bits are not functioning
to aid troubleshooting.

Error reporting for this test identifies whether the error is likely to have occurred during
writing or during reading. Data value mismatch errors are reported in hexadecimal values
starting with “0x” followed by 8 hex digits. If the data value that was ReadBack differs
greatly from the value Wrote, it could mean there was an address bit error, or one or more of
the control signals are bad.

A failure of this test would indicate a problem with the DDR SDRAM (U12), MARA (U5), or
the connections between them.

MARA Sound ROM

This test calculates and verifies the checksum of the on-board Sound (Sample) ROM. It also
tests the data and address lines from MARA to the Sound ROM. This test may also report
errors when the MARA Validity Test fails.

A failure of this test may indicate a problem with the Sound ROM (U13) or its connections to
MARA.

Audio Output

Warning: This test produces loud sine and sawtooth waves. Before beginning this test, turn
the volume on your sound system down to minimum. During this test, the volume slider on
the SP5-8 is disabled.

This is not a test that fails. It is an interactive test for the entire audio chain. However for this
test to pass reliably, the MARA Validity, MARA Delay RAM, and MARA Sound ROM tests
should pass. MARA plays back sine wave samples from ROM and sawtooth waveforms from
Delay RAM. Therefore, MARA and the Delay RAM need to be functioning for this test to
produce a clean audio waveform.

Use the Chan / Param Up or Down button to select or ,

then press the Next button to play the selected waveform.

While playing each waveform, use the Chan / Param Up or Down button to move through a
parameter menu for each waveform. Parameters include Output, Amplitude, and Frequency.
With any of these parameters shown in the display, press the Next button to adjust the
parameter. Once the parameter value is shown, use the Chan / Param Up or Down button to
adjust the parameter value. Refer to the following table for each parameter’s range of values.

3-4
 Description of Tests
Scanner DIAG

Note: The Output parameter controls which of the left and right Audio Outputs that the
audio will play from. Audio always plays from the Headphones output despite how the
Output parameter is set.

After adjusting a parameter, press the Previous button below the LCD to return to the menu
of parameters. From the menu of parameters, press the Previous button below the LCD to
stop playing the waveform and return to the Audio Output menu.

Parameter Default Available Values

Waveform Sine Sine, Sawtooth

Output Both Both, Left, Right

Frequency (Sawtooth) 500Hz 30, 40, 50, 70, 100, 200, 500Hz

Frequency (Sine) 1KHz 30, 40, 50, 70, 100, 200, 500Hz, 1, 2, 5, 10, 15, 20KHz

Amplitude -20db -60,-40, -20, -10, 0dB

Scanner DIAG
The Scanner DIAG tests the functionality of the front panel buttons, LEDs , Volume and other
controls, keyboard contacts, and pedals.

When Scanner DIAG is selected, the display shows the scanner version, keyboard size and
ADC calibration, and keyboard model.

To exit the Scanner DIAG and return to the Diagnostics menu, simultaneously press the
Keypad and Enter buttons.

Scanner DIAG tests

LEDs—Simultaneously press the Previous and Next buttons, to turn on all LEDs. Press both
buttons again to turn off all LEDs.

Front Panel Buttons—To test a button, press any front panel button. The button number and
name shows in the display. Most of the 44 buttons on the SP5-8’s front panel have LEDs. The
LED should turn on each time a button is pressed and turn off when the button is released.
The Previous, Next, Chan / Param Up and Down, and Shift buttons do not have LEDs.
Although the Shift button does not have an LED, pressing it tests one of the three LEDs
above it. Each time you press the Shift button one of the three LEDs will light.

Volume and Control Sliders—Move the volume or one of the five control sliders to test
its operation. The control name and numeric value result (current position of the slide
potentiometer) shows in the display. The expected test result is— at its lowest position,
approximately at its center position, and at its highest position.

Alpha Wheel—To test the Alpha Wheel, turn it clockwise or counterclockwise. Doing so,
increases or decreases the value by one. The expected test result when the Spin knob is turned
is one of four values– , , , or .

3-5
Description of Tests
Burn-in Test

Pitch and Mod Wheels—To test the Pitch or Mod wheel, move the wheel up and down. The
wheel name and numeric value result (current position of the wheels) shows in the display.
You should see at its lowest position and approximately at its highest position.
When you release the Pitch wheel, it returns to center and you should see approximately
(normal pitch).

Pedals—The Scanner DIAG for the SW Pedals and the CC Pedal tests and displays the pedal
name and whether or not the pedal is open or closed. For example, connect a pedal to the SW
Pedal jack and press the pedal, you should see . Release the pedal, you should see

Keyboard—To test the keyboard, press and hold any key. The test name ( ), key name
(i.e. C4) and key number (front or rear contact) are shown in the display. The key name and
number are shown twice. The first key number test result is for the front key contact switch
and the second is for the rear key contact switch. The two key numbers should always match.

To test Pressure (Aftertouch), press the key harder. The display shows the test result on
an additional line below the key test results. With slight pressure applied, you should
see approximately . As you add pressure, the display shows an increasing range of
pressure values. The highest expected value should be at least .

Burn-in Test
Burn-in Test continuously runs the following sequence of tests.

•  SDRAM Refresh
•  MIDI UART
•  Internal Flash
•  MARA Validity
•  MARA Delay RAM
•  MARA Sound ROM

This test requires a MIDI loop (a MIDI cable that connects the MIDI Out jack to MIDI In jack
on the SP5-8‘s rear panel). During Burn-In Loop if a MIDI cable is not connected between
SP5-8‘s two MIDI jacks, the test stalls and the display scrolls .
While running Burn-in Continuous, the test continues but displays a failure.

While running Burn-in Loop, the display shows the total number of tests run and the number
of the current test number one through 6. For example, . While running Burn‑in
Continuous, the display shows the total number of tests run and the number of failures
detected. For example, .

To exit the Burn-in Test and return to the Diagnostics menu, simultaneously press and hold
the Keypad and Enter buttons, then press the Previous button..

3-6
Chapter 4
Disassembly/Assembly

Introduction
This chapter contains the procedures and illustrations for the disassembly and reassembly of
the SP5-8. There are three sections: Opening the SP5-8, Top Enclosure, and Bottom Enclosure.

Notes, Cautions, Warnings

Please pay special attention to all Notes, Cautions, and Warnings as they not only point out
specific instructions.

Cables, Connectors
Most of the cables with connectors are keyed, and therefore cannot be reversed. If a cable’s
connector is not keyed, the disassembly instructions will caution you.

Throughout the top and bottom enclosures some cable assemblies are bundled together and
secured to the enclosure(s) with mounted head cable wraps. These cable wraps have flexible
tabs and do not need to be cut; just unwrap the flexible tab to release the bundled cables.
Unless otherwise noted, you do not need to unscrew the cable wrap from its position.

Standard plastic tie wraps are also used to bundle cables. Unless the service you are
performing requires it, do not cut the tie wraps. Should you need to do so, be sure to install
new tie wraps.

In some cases, tape fastens cables to PCBs or the enclosure. When disconnecting cable(s),
always peel back the tape from one side so that the tape remains properly positioned.

Required Tools and Materials

•  No. 1 Phillips head screwdriver
•  No. 2 Phillips head screwdriver
•  7/16” nut driver
•  needle-nose pliers
•  Small blunt-end tool (Q-Tip, toothpick, etc.)
•  Foam or soft surface to protect the control panel, the keyboard and other delicate pieces

4-1
Top Enclosure
Opening the SP5-8

Top Enclosure
Opening the SP5-8
Refer to Figure 4-1. Arrows indicate the locations of the enclosure support wall and endcap
screws.

1.  Position the SP5-8 so that its rear panel portion hangs over the edge of your work
surface. This should give you enough room to access the six screws that secure the
enclosure support walls.
2.  Remove the six enclosure support wall screws.
3.  Slide the unit back on your work surface.

Caution: At this point of the procedure, do not remove the endcap screws or the screws
located in the “grayed out” portion of the illustration below.

Keyboard
Endcap screws

Endcap screws
Enclosure Support Wall screws

* *

Rear Panel *Endcap locking bracket screws

Figure 4-1 SP5-8 bottom enclosure, hardware locations

Endcap Endcap
screws screws
guide Rear Panel screws guide
screws screws

Figure 4-2 SP5-8 rear panel, hardware locations

4-2
 Top Enclosure
Removing the Endcaps

Removing the Endcaps

1.  Move the unit so that one end hangs over the edge of your work surface.
2.  Refer to Figure 4-2. Remove the two screws that secure the endcap to the rear panel
portion of the SP5-8.

Caution: While performing the following steps, be sure to hold onto the endcap as you
remove the screws.

Endcap Locking Bracket

Figure 4-3 SP5-8 endcap

3.  Refer to Figure 4-1. Remove the four screws that secure the endcap to the bottom
enclosure. One screw (noted with an * in Figure 4-1) secures the endcap locking bracket
into the endcap clamping bracket (see Figure 4-4). When you remove the endcap locking
bracket screw, it should remain in the endcap. If the bracket is still “locked” into the
top enclosure, pull it slightly to unlock it and remove the endcap. Set the endcap safely
aside.
4.  Slide the SP5-8 back on to your work surface.
5.  Repeat Steps 1– 4 for the other endcap.

Removing the Top Enclosure

Warning: Prepare your work surface. This includes placing foam blocks
behind the unit. When the top enclosure is removed, place it on the foam
blocks to avoid damaging the Alpha Wheel, front panel buttons, sliders,
and other components. The following procedure requires enough room
behind the rear of the unit to place the top enclosure face down on your
work surface.

4-3
Top Enclosure
Replacing the Top Enclosure

1.  Refer to Figure 4-2. Loosen the two guide screws. You do not need to remove these
screws.
2.  Remove the remaining six screws that secure the top enclosure to the bottom enclosure.
3.  Lift the top enclosure straight up a few inches.

Caution: Table 4-1 lists the cables that connect assemblies from the bottom enclosure to
the top enclosure. Unless the service you are performing requires it, you do not need to
disconnect these cables

4.  Turn the top enclosure over and place it face down on your work surface.

endcap clamping
bracket

Figure 4-4

Bottom Enclosure Top Enclosure

Keyboard Bass Right Front Panel PCB

Keyboard Treble Right Front Panel PCB

Wheels Left Front Panel PCB

Key Pressure (white) Left Front Panel PCB

Key Pressure (black) Left Front Panel PCB

Table 4-1 Top and bottom enclosure cables

Replacing the Top Enclosure

1.  Position the top enclosure behind the bottom enclosure.
2.  All cables should be connected and bundled.
3.  Lift the top enclosure over the bottom enclosure, then lower it on to the bottom
enclosure. Use the guide screws to correctly position the top enclosure.

4-4
 Top Enclosure
Replacing the Endcaps

Caution: Verify that all the cables are properly routed and are not caught between the
top and bottom enclosures or the enclosure support wall.

4.  Install the six screws in the SP5-8 bottom enclosure (see Figure 4-2).
5.  Tighten the guide screws.

Replacing the Endcaps

Warning: The following procedure assumes that you have completed the steps
in Replacing the Top Enclosure. If you have not completed these steps, do so before
continuing.

Note: In addition to the screws on the rear panel, the endcap locking bracket secures
the endcap to the top enclosure. When the endcap locking bracket is in position, it rests
against a clamping bracket located on the underside of the top enclosure. See 4-4 for
the location of the endcap locking bracket.

1.  Slide one end of the unit off of your work surface and hold the appropriate endcap and
endcap locking bracket in position.
2.  Install the endcap locking bracket screw in the bottom enclosure.
3.  Install the three remaining endcap screws in the bottom enclosure.
4.  Refer to 4-2. Install the two endcap screws in the rear panel.
5.  Slide the unit back onto your work surface.
6.  Repeat for the other endcap.

Closing the SP5-8

Warning: The following procedure assumes that you have completed the steps in
Replacing the Top Enclosure and Replacing the Endcaps. If you have not completed these
steps, do so before continuing.

1.  Position the SP5-8 so that its rear panel portion hangs over the edge of your work
surface.
2.  Install the six enclosure support wall screws.
3.  Slide the unit back on your work surface.

4-5
Top Enclosure
Removing the Engine PCB

Removing the Engine PCB

Figure 4-5 Engine PCB

1.  Following Steps 2, 3, and 4 disconnect the cables listed in Table 4-2.

Ref. Name Cable Type Destination

J11 Audio A shielded wire Left Front Panel PCB

J31 MIDI/CPU stranded wire Right Front Panel PCB
J14 USB Control stranded wire Right Front Panel PCB
J26 USB Data shielded wire Right Front Panel PCB
J19 Char LCD flat ribbon LCD
J7 ScanPort flat ribbon Right Front Panel PCB
J23 Power Conn stranded wire Right Front Panel PCB

Table 4-2 Engine PCB cables

2.  Disconnect stranded wire and shielded wire cables at the following locations:
J11, J14, J26, and J31.
3.  Disconnect the flat ribbon cable from J19 and J7.

Note: If the flat ribbon cables have connectors with tabs to secure them, squeeze the tabs
inward and disconnect the cables. If the flat ribbon cables uses locking cable clips, remove the
clips and set them safely aside.

4.  Disconnect the stranded wire cable from J23.

4-6
 Top Enclosure
Replacing the Engine PCB

cable wrap

J26
J31 J23
MIDI/CPU Power Conn
J14
J11
Audio A Engine PCB
J19
Char LCD J7 ScanPort

plate

do not remove

Figure 4-6 Engine PCB connector and hardware locations

5.  Unwrap the cable wraps at the locations noted in Figure 4-6.
6.  The front edge (normally closest to the keyboard) of the Engine PCB is mounted on
plate that is secured to the top enclosure. When you remove the Engine PCB, it is not
necessary to remove the plate.
7.  Remove the six screws that secure the Engine PCB to the top enclosure and mounting
plate. Two of these screws also secure a cable wrap. When you remove the screws, keep
the cable wraps with them.
8.  Remove the Engine PCB.

Replacing the Engine PCB

1.  Place the Engine PCB in position on the top enclosure and mounting plate.
2.  Install the six screws to secure it. Be sure to install the cable wraps at the locations noted
in Figure 4-6.
3.  Connect the stranded wire cable to J23.
4.  Connect flat ribbon cable from J1 on the Right Front Panel PCB to J7 on the Engine PCB.
5.  Connect flat ribbon cable from the LCD to J19 on the Engine PCB.

Note: If the flat ribbon cables use locking cable clips, be sure to install them.

6.  Connect the stranded wire and shielded wire cables in the following order:
J26, J14, J31, and J11
7.  Be sure the cables are properly routed and bundled. Wrap the flexible tab of the cable
wraps to secure the cables.

4-7
Top Enclosure
Removing the Right Front Panel PCB

Removing the Right Front Panel PCB

1.  Follow the procedure to remove the top enclosure.

Note: Prepare your work surface. Be sure to place the top enclosure on foam or other
soft surface to prevent damage or scratches to the rotary and slide potentiometers,
switch buttons, the LCD, and front panel.

2.  Place the top enclosure face down on your work surface.
3.  Remove the three screws that secure the enclosure support wall and set the wall aside.
4.  Following Steps 5 and 6, disconnect the cables listed in Table 4-3.

Ref. Name Cable Type Destination

J1 ScanPort flat ribbon Engine PCB

J3 Keyboard Treble flat ribbon Keyboard Assembly

J4 MIDI stranded wire Engine PCB

J5 Keyboard Bass flat ribbon Keyboard Assembly

J6 Power Switch stranded wire Power Switch Assembly

J8 USB stranded wire Engine PCB

J9 DC Power Out shielded wire Engine PCB

J10 USB stranded wire Engine PCB

J19 Control Panel Bridge flat ribbon Left Front Panel PCB
Table 4-3 Right Front Panel PCB cables

Note: If a flat ribbon cable has a connector with tabs to secure it, squeeze the tabs
inward and disconnect the cable. If a flat ribbon cable uses a locking cable clip, remove
the clip and set it safely aside.

5.  Disconnect the flat ribbon cables in the following order:

J19, Control Panel Bridge; J1, Scan Port; J5, Keyboard Bass; J3, Keyboard Treble.

Note: When you disconnect the Bass and Treble flat ribbon cables, feel free to mark
the cables designating B for Bass and T for Treble to avoid reversing the cables when
reconnecting.

6.  Disconnect the remaining shielded and stranded wire cables in the following order:
J4, J10, J8, J6, and J9.
7.  Unwrap the tab of the cable wrap (see Figure 4-7) so that you can move the bundled
cables.
8.  Remove the five remaining screws that secure the Right Front Panel PCB to the top
enclosure. One screw also secures the cable wrap. Keep the cable wrap with the screw.

4-8
 Top Enclosure
Replacing the Right Front Panel PCB

cable wrap

J10
J6 USB
Power Data J3 Treble
Switch
J8
USB J4 MIDI J5 Bass J1 ScanPort
Control
J19
Control
Panel
Bridge
J9

DC
Pwr
Out enclosure support wall

Figure 4-7 SP5-8 Right Front Panel PCB hardware locations

9.  Remove the Right Front Panel PCB. The LEDs, switches, Spin knob, and other
components are now accessible.

Note: Each switch button has a shroud that positions and locks the switch in place on
the Right Front Panel PCB. To remove a switch squeeze the legs (two positions) that
secure the shroud to the Right Front Panel PCB. To install the shroud and switch button,
position the shroud and switch over its location on the Right Front Panel PCB and apply
slight pressure to insert the legs back into place.

Replacing the Right Front Panel PCB

1.  Place the Right Front Panel PCB on the top enclosure.
2.  Hold the Right Front Panel PCB in position and tilt the top enclosure up to verify that
the Spin knob, LCD contrast potentiometer, and switch buttons are positioned correctly
and can move freely. Lower the top enclosure.
3.  Install the five screws that secure the Right Front Panel PCB to the top enclosure.
4.  Connect the shielded and stranded wire cables in the following order:
J9, J6, J8, J10, and J4.
5.  Connect flat ribbon cables in the following order:
J3, Treble; J5, Bass; J1, ScanPort; J19, Control Panel Bridge.

Note: If the flat ribbon cables use locking cable clips, be sure to install them.

6.  Be sure the cables are properly routed and bundled. Wrap the flexible tab of the cable
wrap to secure the cables.
7.  Position the enclosure support wall over the edge of the Right Front Panel PCB and
install the three screws to secure it.

4-9
Top Enclosure
Removing the LCD

Removing the LCD

The LCD is secured to a bezel connected to the Left Front Panel PCB.

1.  Follow the procedure to open the top enclosure.

2.  Remove the four screws that secure the LCD to the top enclosure.
a.  If you are replacing the LCD with a new one, continue to Step 3.
b.  If you are removing the LCD to access the Left Front Panel PCB or to perform
another operation, lift the LCD up from the bezel and turn it over so that it rests
above the Right Front Panel PCB. Be sure to place a piece of anti-static material
between the LCD and the Right Front Panel PCB.
3.  Disconnect the flat ribbon cable from J19 on the Engine PCB.
4.  The flat ribbon cable that connects the LCD to the Engine PCB is bundled with other
cables. To remove the LCD, you need to cut the tie wraps and unwrap the tabs of the
two cable wraps (one on the Right Front Panel PCB and one on the Engine PCB) to free
the cable.
5.  Remove the LCD.

Replacing the LCD

1.  Place the LCD in position on the LCD bezel.
2.  Install the four screws to secure the LCD to the bezel.
3.  If the service performed required removing the LCD completely, connect the flat ribbon
cable to the to J19 on the Engine PCB.
4.  Bundle the flat ribbon cable with the other cables and wrap the flexible tabs of the two
cable wraps (one on the Right Front Panel PCB and one on the Engine PCB) to secure
them. Replace cut tie wraps.

Removing the Left Front Panel PCB

The Left Front Panel PCB is mounted on the SP5-8 top enclosure. In addition to the screws
securing the Left Front Panel PCB to the inside of the top enclosure, there is hardware on the
rear panel portion of the top enclosure (securing the rear panel jacks) and slider knobs on the
front panel.

From the Rear Panel

1.  Position the SP5-8 top enclosure so that the rear panel jacks and connectors are
accessible.
2.  Remove the nuts and star washers from the audio and pedal jacks.

From the Front Panel

3.  Tilt the top enclosure up and remove the knobs from the Master Volume and control
sliders. Place the top enclosure back on to your work surface.

4-10
 Top Enclosure
Removing the Left Front Panel PCB

Inside the Top Enclosure

4.  Removing the Left Front Panel PCB requires removing the LCD. Follow the procedure
on page 4-10 and remove the LCD.
5.  Following Steps 6–9, disconnect the cables listed in Table 4-2.

Ref. Name Cable Type Destination

J1 Key Pressure (White) stranded wire Keyboard Assembly

J2 Key Pressure (Black) stranded wire Keyboard Assembly

J7 Audio from Engine shielded wire Engine PCB

J20 Wheels stranded wire Wheels Assembly

J25 Control Panel Bridge flat ribbon Right Front Panel PCB
Table 4-4 Left Front Panel PCB cables

Note: If a flat ribbon cable has a connector with tabs to secure it, squeeze the tabs
inward and disconnect the cable. If a flat ribbon cable uses a locking cable clip, remove
the clip and set it safely aside.

6.  Disconnect the flat ribbon cable from J25.

7.  Disconnect the stranded wire cables in the following order:
J2, J1, and J20.
8.  Disconnect the shielded wire cable from J7.

cable wrap cable wrap

J1 Pressure White J7 Audio from Engine

J25

LCD
Control
Panel
Bridge J20
opening J2 Pressure Black
Wheels
enclosure support wall

Figure 4-8 Left Front Panel PCB connector and hardware locations

9.  Remove the three screws that secure the enclosure support wall and set the wall aside.
10.  Remove the eight remaining screws that secure the Left Front Panel PCB to the top
enclosure. Two of these screws also secure cable wraps. Keep the cable wraps with the
screws.
11.  Remove the Left Front Panel PCB. The LEDs, switch buttons, sliders, and other
components are now accessible.

4-11
Top Enclosure
Replacing the Left Front Panel PCB

Note: Each switch button has a shroud that positions and locks the switch in place
on the Left Front Panel PCB. To remove a switch squeeze the legs (two positions) that
secure the shroud to the Left Front Panel PCB. To install the shroud and switch button,
position the shroud and switch over its location on the Left Front Panel PCB and apply
slight pressure to insert the legs back into place.

Replacing the Left Front Panel PCB

Steps 1–8 describe the procedure to secure the Left Front Panel PCB to the inside of the top
enclosure. Steps 9–11 describe the procedure to install its hardware on the rear panel and
front panel of the top enclosure.

1.  Align the mounting holes on the Left Front Panel PCB over their positions on the top
enclosure. Be sure the rear panel jacks and connectors are correctly positioned at their
openings in the rear panel portion of the top enclosure.
2.  Hold the Left Front Panel PCB in position and tilt the top enclosure up to verify that the
switch buttons and sliders are positioned correctly and can move freely. Lower the top
enclosure.
3.  Install the eight screws that secure the Left Front PCB to the top enclosure. Cable wraps
should be at two of these locations (see Figure 4-8).
4.  Position the enclosure support wall over the edge of the Left Front Panel PCB and install
the three screws to secure it.
5.  Follow the procedure on page 4-10 to replace the LCD.
6.  Connect the flat ribbon cable from J25.

Note: If the flat ribbon cable uses a locking cable clip, be sure to install it.

7.  Connect the shielded wire cable from J7. Wrap the flexible tabs (two positions) of the
cable wraps to secure this cable.
8.  Connect the stranded wire cables in the following order:
J1, J2, J20.

On the Rear Panel

9.  Position the SP5-8 top enclosure so that the rear panel jacks and connectors are
accessible.
10.  Install the nuts and star washers to secure the audio and pedal jacks.

On the Front Panel

11.  Tilt the top enclosure up and install the knobs for the Master Volume and control sliders.
Lower the top enclosure back on to your work surface.

4-12
 Bottom Enclosure
Removing the Wheels Assembly

Bottom Enclosure
The bottom enclosure includes the Wheels Assembly and Keyboard Assembly.

Keyboard

front keyboard screws

rear keyboard screws

Rear Panel
Wheels screws

Figure 4-9 Wheels Assembly and Keyboard Assembly hardware locations

Removing the Wheels Assembly

The following procedure assumes that you have completed the instructions on page 4-2
through page 4-4 to open the SP5-8 and remove the top enclosure.

1.  Refer to Figure 4-9. Slide the left front corner of the SP5-8 forward off of your work
surface to access the four screws securing the Wheels Assembly to the bottom enclosure.
Remove the four screws.
2.  Slide the unit back onto your work surface.

Note: The stranded wire cable connecting the Mod and Pitch wheels to the Left Front
Panel PCB is bundled (using tie wraps) with the Aftertouch stranded wire cables. Tape
secures the cable bundle to the bottom enclosure. Tape also secures the Aftertouch flex
cables and their connection to the Aftertouch stranded wire cables. Always peel back the
tape from one side to free the cable(s).

3.  Lift the Wheels Assembly up, approximately two inches. Tape (at two locations) secures
the Aftertouch flex cable(s) to the bottom enclosure. Peel back the tape from one side
to free the cable(s). Disconnect the Aftertouch flex cables from the Aftertouch stranded
wire cables. Be sure to mark one or both cables and connectors to distinguish between
the white and black pressure strips.
4.  Disconnect the J20 from the Left Front Panel PCB.
5.  Remove the tape, cut the tie wraps, and free the Wheels Assembly stranded wire cable.
6.  Remove the Wheels Assembly.

4-13
Bottom Enclosure
Replacing the Wheels Assembly

Replacing the Wheels Assembly

1.  Hold the Wheels Assembly in position over the bottom enclosure.
2.  Connect the Aftertouch flex cables to the Aftertouch stranded wire cables.
3.  Reapply the tape to the Aftertouch flex cables.
4.  Lower the Wheels Assembly into position.
5.  Move the unit forward and install the four screws to secure the Wheels Assembly to the
bottom enclosure.
6.  Slide the unit back onto your work surface.
7.  Connect the Wheels Assembly stranded wire cable to J20 on the Left Front Panel PCB.
8.  Bundle the Wheels Assembly stranded wire cable and the Aftertouch stranded wire
cables with tie wraps then reapply the tape to secure the bundle to the bottom enclosure.

Removing the Keyboard Assembly

The following procedure assumes that you have completed the instructions on page 4-2
through page 4-4 to open the SP5-8 and remove the top enclosure.

1.  Follow the procedure to remove the Wheels Assembly.

2.  The flat ribbon cables that connect the Keyboard Assembly to the Right Front Panel PCB
were disconnected while removing the top enclosure. Before proceeding, verify that the
cables are not bundled with other cables and that they can move freely.
3.  Refer to Figure 4-9.

Caution: Step 4 instructs you to lift the back edge of the SP5-8 up to access the three screws
secure the back edge of the Keyboard Assembly. You should be in position at the front edge of
the SP5-8 to provide added support and protection with your body.

4.  Slide the SP5-8 toward the middle of your work surface (away from the front edge).
While continuously supporting the SP5-8, tilt its the back edge up and remove the three
screws securing the back edge of the Keyboard Assembly to the bottom enclosure, then
lay the SP5-8 flat on your work surface.
5.  Slide the SP5-8 bottom enclosure forward so that the front edge hangs over your work
surface and remove the six front keyboard screws. Slide the SP5-8 back onto your work
surface.
6.  Remove the Keyboard Assembly from the SP5-8 bottom enclosure and place it on your
work surface.

4-14
 Bottom Enclosure
Replacing the Keyboard Assembly

Replacing the Keyboard Assembly

Note: Before proceeding, verify that the Keyboard Assembly cables are connected (Bass and
Treble flat ribbon cables and the flat flex cables connecting the Keyboard Contact PCBs).

1.  Place the Keyboard Assembly on the bottom enclosure. Make sure the Bass and Treble
flat ribbon cables are visible.
2.  Slide the SP5-8 bottom enclosure forward so that the front edge hangs over your work
surface. Install the six front screws. Slide the SP5-8 back on to your work surface.

Caution: Step 3 instructs you to lift the back edge of the SP5-8 up to access the three screws
that secure the back edge of the Keyboard Assembly. You should be in position at the front
edge of the SP5-8 to provide added support and protection with your body.

3.  Slide the SP5-8 toward the middle of your work surface (away from the front edge).
While continuously supporting the SP5-8, tilt the SP5-8 up and install the three screws
securing the back edge of the Keyboard Assembly to the bottom enclosure, then lay the
SP5-8 flat on your work surface.
4.  If the service to the SP5-8 is complete, follow the procedure on page 4-3, Replacing the
Top Enclosure.

Removing Keys
The following procedure assumes that you have completed the instructions on page 4-2
through page 4-4 to open the SP5-8 and remove the top enclosure.

1.  Follow the procedure to remove the Keyboard Assembly.

2.  The following diagrams show the outline of the natural and sharp keys and illustrate
how their design interacts with the keyboard chassis and Key Contact PCBs.

Clips on the
keyboard Hammer location–strikes
chassis pivot the front and rear key
Key Spring contact on key depression
Location Hooks under the front
of the keyboard chassis

Figure 4-10 Natural/white key

4-15
Bottom Enclosure
Removing Keys

Clips on the
keyboard Hammer location–strikes Hooks through the
chassis pivot the front and rear key front of the keyboard
Key Spring contact on key depression chassis
Location

Figure 4-11 Sharp/black key

3.  Insert a small pair of needle-nose pliers between the key clips and the chassis pivot.
4.  Use the needle-nose pliers to spread the clips outward. The key pops up when it clears
the pivot.

Caution: Some keys pop up quicker than others. Make sure the Keyboard Assembly is
positioned so that a key does not fall off of your work surface.

Figure 4-12 Key clips

5.  The key should now be free of the pivot. Be sure the key is free from the keyboard
chassis before removing the key.

4-16
 Bottom Enclosure
Replacing Keys

To remove a natural key, lift the key up slightly, then forward. The front edge of the
key hooks under the keyboard chassis.
To remove a sharp key, lift the key up slightly, then forward. The front edge of the
key hooks through the keyboard chassis.

6.  Remove the key.

Caution: Each key has a key spring (silver springs for natural keys and black springs for
sharp keys). The key spring slips over a post on the keyboard chassis and is held in place
when the key is installed. When you remove a key, the key spring is free. Leave the spring in
its position on the keyboard chassis or set it safely aside.

Replacing Keys
1.  Verify the placement of the key spring on the keyboard chassis.
2.  If you are replacing a natural key, hook the front end of the key under the keyboard
chassis. For a sharp key, hook the front end through the keyboard chassis.
3.  Lower the key into position. Make certain the key post is correctly positioned in the key
spring.
4.  Align the pivot with the hole at the rear of the key. Apply pressure to the back of the key.
The key clips separate and clip on the pivot.

Key Spring

Hammer

Pivot Key Contact PCB

Figure 4-13 Key Spring and pivot locations

4-17
Bottom Enclosure
Keyboard Contact PCBs

Keyboard Contact PCBs

The SP5-8 Keyboard Assembly has three Keyboard Contact PCBs: Lo (A0 to E3), Mid (F3‑C6),
and Hi (C#6 to C8).

1.  Place the keyboard upside down on a flat soft surface. Be sure that the keys are resting
on a soft surface to avoid scratching or other damage. The Lo, Mid, and Hi Contact PCBs
are now visible.

Removing the Lo Contact PCB

1.  Disconnect the flat flex cable that connects the Lo and Mid Contact PCBs. Gently tug on
the flat flex cable to disconnect it.
2.  Remove the 11 screws that secure the Lo Contact PCB to the keyboard chassis.
3.  There is a small flat plate connecting the Lo and Mid Contact PCBs. Two screws secure
it. The screw on the Lo side is one of the 11 screws described in Step 2. The second screw
is on the Mid Contact PCB. Remove the screw from the plate on the Mid Contact PCB
and set the plate safely aside.
4.  Carefully lift and remove the Lo Contact PCB.

Replacing the Lo Contact PCB

1.  Position the Lo Contact PCB over the keyboard chassis. The flat flex cable connector and
the keyboard diodes should be positioned closest to the back of the keyboard chassis.

Post Tab

Figure 4-14 Keyboard chassis tabs and posts

2.  Refer to Figure 4-21. In addition to the 11 screws that secure the Lo Contact PCB to the
keyboard chassis, there are tabs positioned along the length of the keyboard chassis and
alignment posts that help secure and correctly position the Lo Contact PCB.
c.  Angle the PCB so that its front edge is positioned under the tabs and align the screw
holes in the PCB over their location on the keyboard chassis.

4-18
 Bottom Enclosure
Keyboard Contact PCBs

d.  Apply slight pressure to the back end of the Lo Contact PCB. Doing so, lowers the
PCB so that it is laying flat on the keyboard chassis.
e.  Make sure the alignment posts are positioned through the holes provided for them
on the Lo Contact PCB.

Caution: If you need to reposition the PCB, be careful you do not dislodge or damage the
keyboard contacts.

f.  Install the 11 screws to secure the Lo Contact PCB to the keyboard chassis. While
doing so, include the small flat plate that connects the Lo and Mid Contact PCBs.
Install the screw to secure the small flat plate on the Mid Contact PCB.
3.  Insert the flat flex cable from the Mid Contact PCB into the connector on the Lo Contact
PCB.

Removing the Mid Contact PCB

1.  Disconnect the flat flex cables that connect the Mid Contact PCB to the Lo and Hi
Contact PCBs. Gently tug on the flat flex cables to disconnect them.
2.  Disconnect the flat ribbon cables from J6 (Bass) and J7 (Treble) on the Mid Contact PCB.
Should the flat ribbon cables have tape securing them to the contact PCB, peel back the
tape from one side so that the tape remains properly positioned.
3.  Remove the ten screws that secure the Mid Contact PCB to the keyboard chassis.
4.  There is a small flat plate connecting the Mid to the Lo Contact PCBs. Two screws secure
it. The screw on the Mid side is one of the ten screws described in Step 3. The second
screw is on the Lo Contact PCB. Remove the screw from the plate on the Lo Contact PCB
and set the plate safely aside.
5.  Carefully lift and remove the Mid Contact PCB.

Replacing the Mid Contact PCB

1.  Position the Mid Contact PCB over the keyboard chassis. The flat flex cable connector
and the keyboard diodes should be positioned closest to the back of the keyboard
chassis.
2.  Refer to Figure 4-21. In addition to the ten screws that secure the Mid Contact PCB to the
keyboard chassis, there are tabs and alignment posts on the keyboard chassis that help
secure and correctly position the Mid Contact PCB.
a.  Angle the PCB so that its front edge is positioned under the tabs and align the screw
holes in the PCB over their location on the keyboard chassis.
b.  Apply slight pressure to the back end of the Mid Contact PCB. Doing so, lowers the
PCB so that it is laying flat on the keyboard chassis.
c.  Make sure the alignment posts are positioned through the holes provided for them
on the Mid Contact PCB.

4-19
Bottom Enclosure
Keyboard Contact PCBs

Caution: If you need to reposition the PCB, be careful you do not dislodge or damage the
keyboard contacts.

d.  Install the ten screws to secure the Mid Contact PCB to the keyboard chassis. While
doing so, include the small flat plate that connects the Lo and Mid Contact PCBs.
Install the screw to secure the small flat plate on the Lo Contact PCB.
3.  Insert the flat flex cable from the Lo Contact PCB into the connector on the Mid Contact
PCB.
4.  Connect the flat ribbon cables; Bass (J6) and Treble (J7). Be sure to reapply the tape to
secure the ribbon cable(s).

Note: The Bass flat ribbon cable is longer.

Removing the Hi Contact PCB

1.  Disconnect the flat flex cable that connects the Mid and Hi Contact PCBs. Gently tug on
the flat flex cable to disconnect it.
2.  Remove the eight screws that secure the Hi Contact PCB to the keyboard chassis.
3.  Carefully lift and remove the Hi Contact PCB.

Replacing the Hi Contact PCB

1.  Position the Hi Contact PCB over the keyboard chassis. The flat flex cable connector and
the keyboard diodes should be positioned closest to the back of the keyboard chassis.
2.  Refer to Figure 4-21. In addition to the eight screws that secure the Hi Contact PCB to
the keyboard chassis, there are tabs and alignment posts on the keyboard chassis that
help secure and correctly position the Hi Contact PCB.
a.  Angle the PCB so that its front edge is positioned under the tabs and align the screw
holes in the PCB over their location on the keyboard chassis.
b.  Apply slight pressure to the back end of the Hi Contact PCB. Doing so, lowers the
PCB so that it is laying flat on the keyboard chassis.
c.  Make sure the alignment posts are positioned through the holes provided for them
on the Hi Contact PCB.

Caution: If you need to reposition the PCB, be careful you do not dislodge or damage the
keyboard contacts.

3.  Install the eight screws to secure the Hi Contact PCB to the keyboard chassis.
4.  Insert the flat flex cable from the Mid Contact PCB into the connector on the Hi Contact
PCB.

4-20
 Bottom Enclosure
Removing the Keyboard Contact Strips

Removing the Keyboard Contact Strips

1.  Place the keyboard upside down on a flat soft surface. Be sure that the keys are resting
on a soft surface to avoid scratching or other damage.
2.  Follow the procedure to remove the Keyboard Contact Board(s).
3.  Examine the keyboard contact strips and look at the design of an individual contact.
The top portion of the contact has two indentations. One indentation is deeper than the
other. When replacing the keyboard contact strips, the deeper indentation is positioned
closest to the edge of the contact PCB.
4.  The keyboard contact strips have mounting pegs that secure the contact strips to the
Keyboard Contact PCBs.
5.  To remove a keyboard contact strip, gently lift and free the strip from its position. Be
careful not to rip or damage any contact in the process.

Replacing the Keyboard Contact Strips

1.  Position the contact strip on the Keyboard Contact PCB that you are servicing.

Note: Be sure that the deeper indentation is positioned closest to the edge of the contact PCB.

Key Contact side view

Contact Board

Deeper
contact
Contact top view
indent

Figure 4-15 Key Contacts

2.  Line up the contact strip mounting pegs with their respective mounting holes on the
Keyboard Contact PCB.
3.  Using a small blunt-end tool (Q-Tip, toothpick, etc.), gently push the mounting pegs
through the holes. Do not use too much force or use a tool that can poke a hole through
the mounting pegs. However, be sure that the mounting pegs are installed through the
holes and the contact strip is flat against the Keyboard Contact PCB at each peg location.

4-21



4-22
Chapter 5
Troubleshooting & Maintenance

Introduction

Surface-Mount Devices
The removal and replacement of surface-mount devices requires training and proper
equipment. If you do not have the training or equipment to remove and replace surface-
mount devices, contact the Service Department to order a replacement PCB. International
service technicians should contact their appropriate Young Chang Distributor.

Cables, Connectors
Most of the cables with connectors are keyed, and therefore cannot be reversed. If a cable’s
connector is not keyed, the disassembly instructions will caution you.

Throughout the top and bottom enclosures some cable assemblies are bundled together and
secured to the enclosure(s) with mounted head cable wraps. These cable wraps have flexible
tabs and do not need to be cut; just unwrap the flexible tab to release the bundled cables.
Unless otherwise noted, you do not need to unscrew the cable wrap from its position.

Standard plastic tie wraps are also used to bundle cables. Unless the service you are
performing requires it, do not cut the tie wraps. Should you need to do so, be sure to install
new tie wraps.

In some cases, tape fastens cables to PCBs or the enclosure. When disconnecting cable(s),
always peel back the tape from one side so that the tape remains properly positioned.

Required Tools and Materials

•  No. 1 Phillips head screwdriver
•  No. 2 Phillips head screwdriver
•  7/16” nut driver
•  needle-nose pliers
•  Small blunt-end tool (Q-Tip, toothpick, etc.)
•  Foam or soft surface to protect the front panel, the keyboard and other delicate pieces

5-1
Troubleshooting & Maintenance
Boot Loader

Boot Loader
Use the SP5-8 Boot Loader to enter Diagnostics or perform a hard reset to the unit. You can
also install operating system updates and objects into Flash memory.

Entering the Boot Loader

Press and hold the Shift button and apply power to the unit. When appears in
the display, release the Shift button. You should see and the version
number momentarily in the display then first available Boot Loader menu option,
. Press the Chan / Param Up or Chan / Param Down button to move through the
available menu options, then press the Next button to select it.

The following is a brief description of the five available menu options in the SP5-8 Boot
Loader.

Run SP5-8—Exits the Boot Loader and returns the unit to normal operation.

Update Software—Select this to install new system software and objects.

Run Diagnostics—Enters the diagnostic test menu. For a complete list of tests and the
procedure to execute the diagnostic tests, refer to Chapter 3, Diagnostics.

System Reset—Clears user memory and restores the unit to factory default settings.

File Utilities—Use this to save and restore SP5-8 files, or execute an SP5-8 image via USB.

Resets
There are three ways to perform a hard reset to the SP5-8.

1.  While holding down the C8 key, apply power to the SP5-8. Release the key when
appears in the display.
2.  Press the Global button. Press the Chan / Param Up or Chan / Param Down button to
move through the available parameters until you see in the display. Press
the Next button. The display shows .
To erase all user objects and restore the unit to factory settings, press the Next button to
confirm. To cancel the Hard Reset, press Previous or any other function button.
3.  Boot Loader—When appears in the display, release the Shift button. You
should see and the version number momentarily in the display
then first available Boot Loader menu option, .
Press the Chan / Param Up or Chan / Param Down button to move through the
available menu options until is in the display, then press the Next button
to select it. The display prompts , press the Next button.
When complete, the display shows .

5-2
 Troubleshooting & Maintenance
Software Updates

Software Updates
1.  Go to www.kurzweil.com and follow the links to download the latest software version
to your computer desktop.

Note: The Operating System and Object files are combined in one file type (.KUF).

2.  Connect a USB cable from a computer to the USB port on the SP5-8 rear panel.
3.  When appears in the display, release the Shift button.
4.  You should see in the display.
5.  Check the computer desktop and verify that the SP5-8 USB device/window is present.
(This should appear on the desktop as an icon or window.)
6.  Press the Param / Chan Down button. The display shows, .
7.  Press the Next button. The display shows . Press the Next button again.
8.  The display shows the following message:
.
9.  Drag and drop the update file(s) directly to the SP5-8 icon on the computer desktop.
Note: Be sure to always read the downloaded release notes and installation instructions in
case they have changed since this manual was written.

10.  Press the Next button on the SP5-8 to begin the update. The display shows:
.
11.  When the update is complete, the display shows: .
12.  Unmount or “safely remove” the SP5-8 icon from your computer.
13.  Turn the SP5-8 off, then on again to test the software updates.

5-3
Troubleshooting & Maintenance
Power Problems

Power Problems

Dead: LCD, LEDs not lit

Before opening the unit, verify the following:

1.  The AC outlet is supplying power.

2.  The AC cord is good and properly connected to the unit.
3.  Check the power switch, DC power jack, and DC power adapter. The adapter rating
must be 15VDC, 1.0A minimum, center pin +.
4.  Open the unit. Follow the procedures on pages 4-2 through 4-3 to remove the top
enclosure.
5.  Refer to the Right Front Panel PCB schematics and check all supply voltages.

Audio Problems

No Audio
1.  Try playing a demo to rule out a keyboard problem. Press the Demo buttons
(simultaneously press the User and All category buttons).
2.  Follow the instructions outlined in Chapter 3 Diagnostics and run the Scanner DIAG
tests to check the volume control operation.
3.  If a volume pedal is plugged in, make sure it is not set to minimum. Or, power-off,
unplug the volume pedal, them power on again.
4.  Refer to the Interconnect Diagram. Check the flat ribbon cable from J11 on the Engine
PCB to J7 on the Left Front Panel PCB.
5.  Check the solder connections at the connectors.
6.  Refer to the Engine PCB schematics, page 7-6, and check the signal activity on the DAC,
U15.
7.  Trace the signal path from the Engine PCB through the Left Front Panel PCB to the audio
jacks.

5-4
 Troubleshooting & Maintenance
Front Panel Problems

Front Panel Problems

LCD not lit, LEDs are lit

1.  If there is audio and the keyboard plays, check LCD contrast adjustment located on the
rear panel. Turn the pot back and forth to see if there is any change.
2.  Refer to the Interconnect Diagram.
3.  Check the ribbon cable from the LCD to J19 on the Engine PCB.
4.  Disconnect and reseat the cable connectors.
5.  Check the solder connections at the connectors.
6.  Trace the signal path.
7.  Find and replace bad component(s) or order a PCB replacement.

LCD, LEDs not lit, buttons, or controllers not working

1.  Run the Scanner DIAG tests. If the tests pass, perform a hard reset.
2.  Refer to the Interconnect Diagram.
3.  Check all related cables. Disconnect and reseat the cables.
4.  Check the solder connections at the connectors.
5.  Check the Control Panel Bridge ribbon cable from the Right Front Panel PCB to the Left
Front Panel PCB.
6.  Check the ribbon cable from the Right Front Panel PCB, J1, to the Engine PCB, J7.
7.  Trace the signal path from the connector on the Engine PCB to the Right Front Panel
PCB.
8.  Find and replace bad component(s) or order a PCB replacement.

5-5
Troubleshooting & Maintenance
Keyboard Problems

Keyboard Problems

Dead Keyboard
1.  Follow the instructions outlined in Chapter 3 Diagnostics and run the Scanner DIAG
tests. If the tests pass, perform a hard reset.
2.  Check the flat ribbon cables connecting the Keyboard Bass and Treble Contact PCBs to
the Right Front Panel PCB, locations J5 and J3 respectively. Be certain that the cables are
not loose or damaged.
3.  Disconnect and re-seat the cables.
4.  Check the flat ribbon cable connectors at location J1 on the Right Front Panel PCB and J7
on the Engine PCB.
5.  Trace the signal path.
6.  Find and replace bad component(s) or order a PCB replacement.

Dead Note(s) or no velocity sensitivity

One or More in a Section

1.  Check the keyboard cables for proper seating and damage. Make sure they are not
pinched under the keyboard or elsewhere creating a short circuit.
2.  Remove related contact PCB.
3.  Check the keyboard contact strip for dirt, damage or wearing. Clean dirty contacts with
denatured alcohol. Replace a damaged or worn keyboard contact strip.
4.  Install keyboard contact strip.
5.  If section is still dead, remove strip and check contact PCB for shorts, cold solder joints,
etc.
6.  Find and replace bad component(s) or order a replacement PCB.

5-6
 Troubleshooting & Maintenance
Interconnect Diagram

Interconnect Diagram

Engine J11
Audio A LCD
PCB
J7 J19
ScanPort Char LCD

J23 J14
Power Conn J31 MIDI/CPU
J26
USB Control

USB Data

J6
Pwr Sw J3 J5
I O Treble Bass
J10
J8 J4 MIDI J1 ScanPort
J19
Control
J9 Right Front Panel
Bridge
Panel PCB
DC
Pwr
Out

Control J1 Pressure
Panel (White) J7
Bridge Audio
from Engine
LCD J2
Pressure J20
Left Front
opening
J25 (Black) Wheels
Panel PCB

5-7
Troubleshooting & Maintenance
Interconnect Diagram

5-8
Chapter 6
Replacement Parts

Printed Circuit Boards and Assemblies

Part No. Description

101010643001 Engine PCB

1010302970 Right Front Panel PCB
1010302990 Left Front Panel PCB
1010600770 Power Switch Assembly
101040072001 LCD Assembly
1010900760 Automatic Shutdown (ERP Control) PCB
6990001390 Keyboard Assembly 88 LK40GH+AFT
N093LK10L6 LK Key Contact PCB LO
N093LKW0M7 LK Key Contact PCB MID
N093LKW0H8 LK Key Contact PCB HI

Keyboard Assembly
Part No. Description

N093LKW005 Key Contact Strip (12 positions)

N093LKW011 Key Natural Low A
N093LKW012 Key Natural Hi C
N093LKW013 Key Sharp
N093LKW014 Key Natural A
N093LKW015 Key Natural B
N093LKW016 Key Natural C
N093LKW017 Key Natural D
N093LKW018 Key Natural E
N093LKW019 Key Natural F
N093LKW020 Key Natural G
N093LK2030 LK Sharp/Black Hammer
N093LK2031 LK Natural/White Hammer

6-1
Replacement Parts


Right Front Panel PCB

Part No. Description Qty. Reference Destination

208010029 Cap Spinknob 1 For SW44

215010069 Switch button bracket 26 For SW13–35, SW41–SW43
6110100570 Spinknob 1 SW44
LED Blue (KB3) 1 D58
6190100460 LED 24 D20–D34, D59–D67
620010006 Jack DC power entry 1 J7
620030002 Jack MIDI 1 J2, J12
620050008 Jack USB 1 J11
629020319 Switch button (7, 8, 9, 0) 1 SW19, SW23, SW25, SW26
629020320 Switch button (4, 5, 6, JKL) 1 SW18, SW20, SW21, SW24
629020321 Switch button (1, 2, 3, ABC) 1 SW13–SW16
629020327 Switch button (DEF, GHI, Space, Insert) 1 SW17, SW28, SW29, SW30
629020328 Switch button (TUV, WXYZ, Kepad, Enter) 1 SW27, SW31, SW35, SW43
629020329 Switch button (MNO, PQRS, +/-, Delete) 1 SW22, SW32, SW33, SW34
629020335 Switch button ( ) 2 SW41, SW42

Left Front Panel PCB

Part No. Description Qty. Reference Destination

207010017 Knob Slider (Master Volume) 1 For VR2

207010025 Knob Slider (Control sliders) 5 For VR5–VR9
215010069 Switch button bracket 18 For SW0–SW12, SW36–SW40
6110100460 Potentiometer Slider 6 VR2, VR5–VR9
6190100460 LED 18 D0-D17
620020011 Jack Stereo (Audio, Headphones, Pedal) 2 J12 J13 J14 J15 J16 J18
SW1–SW4; SW37, SW5, SW6,
629020317 Switch button (4, blank w/LED window) 3
SW11; SW39, SW9, SW10, SW7
629020318 Switch button (single, blank w/LED window) 3 SW0, SW8, SW12
629020326 Switch button (single, blank) 1 SW36
629020333 Switch button (-) 1 SW40
629020334 Switch button (+) 1 SW38

Miscellaneous
Part No. Description Qty. Reference Destination

102990080 Right Endcap Assy 1

102990081 Left Endcap Assy 1
6380101350 SMPS Adaptor 1

6-2
Chapter 7
Schematics

Description Page No.

Engine PCB­—SH7203 CPU, Memory, and Debug UART Header (1 of 5) page 7-3

Engine PCB—MARA (2 of 5) page 7-4

Engine PCB—MARA Clock, Delay Memory, ScanPort, CPLD (3 of 5) page 7-5

Engine PCB—Sound ROM, LCD INTF, Audio Outputs, USB I/F (4 of 5) page 7-6

Engine PCB—Power Circuitry, Test Headers , Reset (5 of 5) page 7-7

Front Panel Right PCB—Button, LED (1 of 2) page 7-8

Front Panel Right PCB (2 of 2) page 7-9

Front Panel Left PCB (1 of 2)) page 7-10

Front Panel Left PCB (2 of 2) page 7-11

Automatic Shutdown (ERP Control) PCB page 7-12

7-1



7-2
 SP5-8 Service Manual
Engine PCB­—SH7203 CPU, Memory, and Debug UART Header (1 of 5)

5 4 3 2 1

VCC33 VCC12
RN1 CPU_A_[22:0]
1 8 PB7_IN CPU_A_[22:0] sh.2,3,4,5
2 7 PB6_IN
3 6 CPU_IRQ_1_L C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 CPU_D_[31:0]
4 5 CPU_IRQ_0_L CPU_D_[31:0] sh.2,3,4,5
10K 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF SDRAM BYPASS CAPS
VCC33 VCC33 VCC33
VCC33
RN2
VCC12 VCC33
1 8 FLASH_CS_L
2 7 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 NAND FLASH C25 C26
VCC33 3 6 PB2_IN
RN3
4 5 SCAN_CS_L 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF

127
141
154
168
191
204
224

123
133
146
159
173
183
184
198
209
218
229
237
1 8 CPU_WAIT_L 10K
CPU U1 U3

16
51
74
89

21
29
43
54
67
80
95

12
37
4

9
2 7 IACK_L
3 6 M1_DACK_L

VCC33
VCC33
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC

PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
PVCC
4 5 M1_DREQ_L 44 CPU_D_7
D VCC33 CPU_A_2 16 I/O_7 43 CPU_D_6 D
10K CPU_A_3 17 CLE I/O_6 42 CPU_D_5 VCC33
57 ALE I/O_5 41
SDRAM
interrupts address bus CPU_D_4
sh.5 CPU_NMI_L NMI I/O_4
VCC33 48 CPU_A_22 8 32 CPU_D_3
RN4 A22/PE3 sh.3 FLRD_L RE I/O_3
182 47 CPU_A_21 18 31 CPU_D_2
sh.4 USB_HOST_FLAG_L PB3/IRQ3/SDA1 A21/PE2 sh.3 FLWR_L WE I/O_2
1 8 PB2_IN 181 46 CPU_A_20 U2 30 CPU_D_1 R2

15
29
43

35
41
49
55
75
81
PB2/IRQ2/SCL1 A20 I/O_1

3
9
2 7 FLWP_L 180 SH7203 45 CPU_A_19 FLWP_L 19 29 CPU_D_0 1.0K
CPU_IRQ_1_L PB1/IRQ1/SDA0 A19 WP I/O_0
3 6 FLCS_L 179 44 CPU_A_18

VDDQ
VDDQ
VDDQ
VDDQ
VDDQ
VDDQ
VDDQ
VDDQ
sh.5 CPU_IRQ_0_L

VDD
VDD
VDD
VDD
4 5 EPROM_INST_L PB0/IRQ0/SCL0 A18 42 CPU_A_17 FLCS_L 9 7 FLRDY

GND
GND
gpio A17 40 CPU_A_16 CE R/B
10K 62 A16 39 CPU_A_15 CPU_A_13 21 56 CPU_D_31
sh.3,5 DSP_RESET_SEL_L PE8/CE2A/IRQ4/SCK2 A15 A11 DQ31
VCC33 WDT_OVRF_L 122 38 CPU_A_14 CPU_A_12 24 54 CPU_D_30
RN5 PB12/IRQOUT/AUDCK A14 A10 DQ30

13
36
BOOT_RDY 88 37 CPU_A_13 CPU_A_11 66 53 CPU_D_29 NAND512W3A2BN
1 8 DAC_CDTI FLRDY 87 PB11/CTxD1 A13 36 CPU_A_12 CPU_A_10 65 A9 QD29 51 CPU_D_28
2 7 DAC_CCLK FLWP_L 86 PB10/CRxD1 A12 35 CPU_A_11 CPU_A_9 64 A8 DQ28 50 CPU_D_27
3 6 DAC_CSN FLCS_L 85 PB9/CTxD0 A11 33 CPU_A_10 CPU_A_8 63 A7 DQ27 48 CPU_D_26
4 5 SPBLANK PB8/CRxD0 A10 30 CPU_A_9 CPU_A_7 62 A6 DQ26 47 CPU_D_25
upper addr / dma A9 28 CPU_A_8 CPU_A_6 61 A5 DQ25 45 CPU_D_24
10K 71 A8 27 60 A4 DQ24 42
IACK_L
PE10/IRQ6/TEND0 A7
CPU_A_7 CPU_A_5
A3 DQ23
CPU_D_23 BOOT FLASH VCC33
66 26 CPU_A_6 CPU_A_4 27 40 CPU_D_22
sh.2,5 M1_DACK_L 64 A24/PE5/IRQ1/DACK0 A6 25 CPU_A_5 CPU_A_3 26 A2 DQ22 39 CPU_D_21
VCC33 sh.3 SH_AVCC sh.2,5 M1_DREQ_L A23/PE4/IRQ0/DREQ0 A5 A1 DQ21
24 CPU_A_4 CPU_A_2 25 37 CPU_D_20
L1 116 adc A4 23 CPU_A_3 A0 MT48LC4M32B2P-7F DQ20 36 CPU_D_19 C28
114 AVREF A3 22 23 DQ19 34
SH_AVCC
120 AVCC A2 20
CPU_A_2
CPU_A_1
CPU_A_15
CPU_A_14 22 BA1 DQ18 33
CPU_D_18
CPU_D_17
U4 0.1uF

37
+ C29 AVSS A1/PC1 17 CPU_A_0 BA0 DQ17 31 CPU_D_16
600 OHM @ 100MHz C27 R3 1.0K DA1 119 A0/CS7/AUDSYNC 59 DQ16 85 CPU_D_15 16
sh.3,4 BRITE

VCC
22uF 0.1uF R1 1.0K DA0 118 AN7/PA7/DA1 data bus VCC33 28 DQM3 DQ15 83 CPU_D_14 CPU_A_18 17 NC/A18
sh.3 SPANA_OUT1 AN6/PA6/DA0 DQM2 DQ14 A17
117 192 CPU_D_31 71 82 CPU_D_13 CPU_A_17 48
115 AN5/PA5 D31/PD15/PINT7 193 CPU_D_30 16 DQM1 DQ13 80 CPU_D_12 CPU_A_16 1 A16 45 CPU_D_15
113 AN4/PA4 D30/PD14/PINT6 194 CPU_D_29 DQM0 DQ12 79 CPU_D_11 CPU_A_15 2 A15 DQ15/A-1 43 CPU_D_14
112 AN3/PA3 D29/PD13/PINT5 195 CPU_D_28 R25 SDRAM_CAS_L 18 DQ11 77 CPU_D_10 CPU_A_14 3 A14 DQ14 41 CPU_D_13
111 AN2/PA3 D28/PD12/PINT4 197 CAS DQ10 76 4 A13 DQ13 39
MIDI / SCAN CONN CPU_D_27 10K CPU_D_9 CPU_A_13 CPU_D_12
110 AN1/PA1 D27/PD11/PINT3 199 CPU_D_26 SDRAM_RAS_L 19 DQ9 74 CPU_D_8 R4 CPU_A_12 5 A12 DQ12 36 CPU_D_11
sh.3 SH_AN0 AN0/PA0 D26/PD10/PINT2 RAS DQ8 A11 DQ11
J31 200 CPU_D_25 13 CPU_D_7 10K CPU_A_11 6 34 CPU_D_10
uart D25/PD9/PINT1 201 CPU_D_24 CPU_WR_L 17 DQ7 11 CPU_D_6 CPU_A_10 7 A10 DQ10 32 CPU_D_9
1 MIDI_TXD 69 D24/PD8/PINT0 202 CPU_D_23 WE DQ6 10 CPU_D_5 CPU_A_9 8 A9 DQ9 30 CPU_D_8
MIDI_TXD 2 MIDI_RXD 68 PE7/DACK1/TXD2 D23/PD7/IRQ7 203 CPU_D_22 SDRAM_CS_L 20 DQ5 8 CPU_D_4 CPU_A_8 18 A8 DQ8 44 CPU_D_7
C C
MIDI_RXD 3 EPROM_INST_L 83 A25/PE6/DREQ1/RXD2 D22/PD6/IRQ6 205 CPU_D_21 CS DQ4 7 CPU_D_3 VCC33 CPU_A_7 19 A7 DQ7 42 CPU_D_6
SCAN_TXD 4 SCAN_TXD 81 PE15/RTS3 D21/PD5/IRQ5 208 CPU_D_20 67 DQ3 5 CPU_D_2 CPU_A_6 20 A6 DQ6 40 CPU_D_5
SCAN_RXD 5 SCAN_RXD 73 PE13/TXD3 D20/PD4/IRQ4 210 CPU_D_19 CKE DQ2 4 CPU_D_1 CPU_A_5 21 A5 DQ5 38 CPU_D_4 VCC33
LCD_CONT 6 PE12/RXD3 D19/PD3/IRQ3 211 CPU_D_18 SDRAM_CLK 68 DQ1 2 CPU_D_0 CPU_A_4 22 A4 DQ4 35 CPU_D_3
AES_OUT 7 LCD_CONT sh.4 78 rtc D18/PD2/IRQ2 212 CPU_D_17 CLK DQ0 R32 CPU_A_3 23 A3 DQ3 33 CPU_D_2
GND 8 79 RTC_X1 D17/PD1/IRQ1 213 24 A2 DQ2 31

VSSQ
VSSQ
VSSQ
VSSQ
VSSQ
VSSQ
VSSQ
VSSQ
CPU_D_16 10K CPU_A_2 CPU_D_1
NC M1_SDOUT_4 sh.2 RTC_X2 D16/PD0/IRQ0 A1 DQ1

VSS
VSS
VSS
VSS
214 CPU_D_15 CPU_A_1 25 29 CPU_D_0 R5
HEADER 8 132 audio clocks D15 215 CPU_D_14 A0 DQ0
1.0K
131 AUDIO_X2 D14 217 CPU_D_13 26
AUDIO_X1 D13 sh.3 BOOT_FL_CS_L CE

44
58
72
86

12
32
38
46
52
78
84
6
VCC33 128 219 CPU_D_12 sh.3 BOOT_FL_OE_L 28 15 BOOT_RDY
AUDIO_CLK D12 220 CPU_D_11 CPU_WR_L 11 OE RY/BY
dig audio D11 221 CPU_D_10 WE
R28 D10
124 222 CPU_D_9 sh.3,5 RESET_L 12
sh.3 SPBLANK PF29/SSID3 D9 RST
R6 R7 125 223 CPU_D_8 27
sh.4 MUTE PF28/SSIWS3 D8 VSS
1.0K 1.0K 126 225 CPU_D_7 47 46
1.0K sh.4 DAC_CSN 134 PF27/SSISCK3 D7 228 CPU_D_6 BYTE VSS
D1 D2 sh.4 DAC_CCLK 135 PF26/SSID2 D6 230 CPU_D_5
AP3216SURCK AP3216SURCK sh.4 DAC_CDTI 136 PF25/SSIWS2 D5 231 CPU_D_4 VCC33 S29AL004D
sh.4 DAC_PDN PF24/SSISCK2 D4 232 CPU_D_3
lcd cntrl /flash D3 233 CPU_D_2
DOTCLK 137 D2 234 CPU_D_1
sh.4 LCD_CP 138 PF18/SSISCK0/LCD_CL2 D1 235 CPU_D_0 R31
sh.4 LCD_M_DISP 139 PF19/SSIWS0/LCD_M_DISP D0
R8
sh.4 LCD_FLM
LCD VSYNC
LCD_CLK_IN 140 PF20/SSID0/LCD_FLM bus control RN6
10K J1 VCC33
PF21/SSISCK1/LCD_CLK sh.3 BOOT_E_CS_L
142 239 1 8 SDRAM_CKE
sh.4 LCD_VCC_PWC 145 PF22/SSIWS1/LCD_VCPWC CKE/PC12 2 7 1 2
DNS J2 VCC33 10K
sh.4 LCD_VEE_PWC PF23/SSID1/LCD_VEPWC 2 3 6 CPU_A_17 3 4 CPU_A_18
2 1 LCD HSYNC 147 CASL/PC9 3 4 5 SDRAM_CAS_L sh.5 5 6
BOOT DEVICE SELECTION CPU_A_15 CPU_A_16
4 3 sh.4 LCD_LP 148 PF17/FCE/LCD_CL1 RASL/PC8 RN7 22 SDRAM_RAS_L sh.5 CPU_A_13 7 8 CPU_A_14
6 5 sh.4 LCD_DISP_OFF_L 149 PF16/FRB/LCD_DON 5 1 8 SDRAM_DQM_3 CPU_A_11 9 10 CPU_A_12
R9 R10 R29 R30 150 PF15/NAF7/LCD_D15 WE3/DQMUU/AH/PC7 8 2 7 11 12 BOOT EPROM

EPROM_INST_L

BOOT_E_CS_L

BOOT_FL_CS_L
SDRAM_DQM_2 CPU_A_9 CPU_A_10
10K 10K 10K 10K 151 PF14/NAF6/LCD_D14 WE2/DQMUL/PC6 10 3 6 SDRAM_DQM_1 CPU_A_7 13 14 CPU_A_8

BOOT_CS_L
HEADER 3X2 152 PF13/NAF5/LCD_D13 WE1/DQMLU/PC5 13 4 5 SDRAM_DQM_0 CPU_A_5 15 16 CPU_A_6 MODULE

CPU_A_19
LED_1 153 PF12/NAF4/LCD_D12 WE0/DQMLL/PC4 22 CPU_A_3 17 18 CPU_A_4
155 PF11/NAF3/LCD_D11 238 19 20
DNS VCC33 LED_2
PF10/NAF2/LCD_D10 RD/WR/PC13 CPU_WR_L sh.3,5
CPU_A_1 CPU_A_2
J16 JMPR_1 158 12 RN8 22 21 22
1 JMPR_2 160 PF9/NAF1/LCD_D9 RD 1 8 CPU_RD_L sh.3,4,5 CPU_D_15 23 24 CPU_D_14
B VCC33 2 PF8/NAF0/LCD_D8 72 2 7 SCAN_CS_L sh.3,5 UART_CS_L 25 26 B
/SDCS CS6/PE11 UART_CS_L sh.3,5
0 0 0 0 1 CPU_D_13 CPU_D_12
3 SD_CS1_L 161 70 3 6 CPU_D_11 27 28 CPU_D_10
SDO 4 SD_SO1 162 PF7/FSC/LCD_D7 CS5/PE9 63 4 5 FLASH_CS_L sh.3,5 29 30
SDI PF6/FOE/LCD_D6 CS4/PE1/MRES/TXD0 LCD_CS_L sh.3,4,5
0 0 1 1 0 CPU_D_9 CPU_D_8
5 SD_SI1 163 14 4 5 CPU_D_7 31 32 CPU_D_6
SCK 6 SD_SCK1 164 PF5/FCDE/LCD_D5 CS3/PC3 15 3 6 SDRAM_CS_L sh.5 33 34
GND sh.4 LCD_D_[3:0] PF4/FWE/LCD_D4 CS2/PC2 MARA_1_CS_L sh.2,5
0 1 0 1 0 CPU_D_5 CPU_D_4
VCC12 LCD_D_3 165 82 2 7 CPU_D_3 35 36 CPU_D_2
HEADER 6 L2 LCD_D_2 166 PF3/LCD_D3 CS1/PE14/CTS3 11 1 8 VCC33 37 38
PF2/LCD_D2 CS0 BOOT_CS_L sh.3,5
0 1 1 1 0* CPU_D_1 CPU_D_0
LCD_D_1 167 RN9 22 VCC33 39 40
SPI I/F CONN 169 PF1/LCD_D1 75
LCD_D_0
PF0/LCD_D0 WAIT/PC14 CPU_WAIT_L sh.2,3,5 1 X X 1 1
C30 + C31 49
BS/PE0/ADTRG ADTRG_L sh.3,5
600 OHM @ 100MHz system clocks R27 HEADER 20X2
22uF 0.1uF SH2A_PLLVCC 60 10K R24
58 PLLVCC usb 101 USB_DP 10K sh.1,3 EPROM_INST_L
SH2A_EXTAL PLLVSS DP 100 USB_DM USB_DP sh.4
X1 56 DM USB_DM sh.4
R12 330 SH2A_XTAL 55 EXTAL 102
XTAL VBUS USB_VBUS sh.4
105 R13
C32 16.6667MHz C33 R14 50 REFRIN C34
sh.3,5 SDRAM_CLK CKIO 5.62K
93 CLK_48MHZ VCC33 J3 DNS VCC33
22 USB_X1
33pF 33pF 90 system control 94 VCC33 0.1uF L4
96 MD USB_X2 L3 OSC48_VCC
MD_CLK1 UART DEBUG
97 107 USB_APVCC 1 2
MD_CLK0 USBAPVCC 106 VCC33 C35
sh.5 RESET
3 4 CPU_A_2 MODULE
59 USBAPVSS C36 600 OHM @ 100MHz CPU_A_1 5 6 CPU_A_0
sh.3,5 RESET_L RES
VCC33 99 600 OHM @ 100MHz Y1 0.1uF R15 CPU_D_7 7 8 CPU_D_6
USBDPVCC

4
240 98 0.1uF 10K CPU_D_5 9 10 CPU_D_4
RN10 VCC33 1 PC11/BREQ/AUDATA1 USBDPVSS C37 VCC33 CPU_D_3 11 12 CPU_D_2
1 8 LCD_CS_L sh.4 USB_HOST_EN_L PC10/BACK/AUDATA0 103 3 1 CPU_D_1 13 14 CPU_D_0
2 7 DSP_RESET_SEL_L debug/emu USBAVCC 104 VCC12 0.1uF OUT EN 15 16
3 6 ASEMD0_L 61 USBAVSS GND 17 18 UART_CS_L
ASEMD sh.3 UART_WR_L
4 5 CPU_NMI_L ASEBRKAK_L 175 108 VCC12 19 20 CPU_IRQ_1_L

2
ASEBRKAK/ASEBRK USBDVCC sh.3 UART_RD_L
4.7K R16 109 L5 48.0000 MHz CPU_IRQ_0_L 21 22
CPU_TCK 178 USBDVSS USB_AVCC 23 24
RN11 CPU_TMS 172 TCK 190 PB7_IN VCC 25 26
10K TMS i2c PB7/IRQ7/SDA3
1 8 CPU_TDO CPU_TDI 174 189 PB6_IN C38 C39
2 7 CPU_TDI CPU_TDO 177 TDI PB6/IRQ6/SCL3 186 600 OHM @ 100MHz
3 6 CPU_TMS CPU_TRST_L 176 TDO PB5/IRQ5/SDA2 185 0.1uF 0.1uF HEADER 13X2
4 5 ASEBRKAK_L TRST PB4/IRQ4/SCL2
A A
4.7K
R17
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
PVSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS

R18 0 VCC33 1.0K VCC33 VCC33

DNS VCC33 VCC33

SH7203 BYPASS CAPS
129
143
156
170
188
206
226

121
130
144
157
171
187
196
207
216
227
236
18
32
52
76
91

19
31
41
53
65
77
84
92
6

H-UDI PORT J4 R19

R20 R21
VCC33
Young Chang R&D Institute
CPU_TCK 1 (1) (8) 2 0 1.0K 1.0K U29 1432 Main St.
CPU_TRST_L 3 (2) (9) 4 (GND) 4 C40 + C41 C42 C43 C44 C45 C46 C47 C48 C49 C50 C51 Waltham MA 02451
CPU_TDO 5 6 1 VCC
DNS I2C_SDA
SDA
USA Copyright 2010 Young Chang Co., Ltd.
ASEBRKAK_EM_L 7 8 J5 C77 100uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF Reproduction without the express written consent of Young Chang Co., Ltd. is prohibited.

CPU_TMS 9 10 Title PC3LE ENGINE BOARD

CPU_TDI 11 12 1 Install jumper for Lauterbach debugger I2C_SCL 3 0.1uF
RESET_L 13 (7) (14) 14 2 when in debug mode. SCL 2 SH7203 CPU, Memory, and Debug UART Header
GND Size By Document Number Rev
HEADER 7X2 24AA02E48_SOT R. Folk 021402 F V1
HEADER2
Date: Wednesday, April 04, 2012 Sheet 1 of 5
5 4 3 2 1

7-3
SP5-8 Service Manual
Engine PCB—MARA (2 of 5)

5 4 3 2 1

VCC33 VCC33 VCC25

MARA 1 DECOUPLING CAPS VCC25
L6
VCC25 VCC18 VCC18 VCC18

C76
C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C63 + + + C67 C68 C69 C70 C71 C72 C73 C74 C75 + C78 C79 C80 C81 600 OHM @ 100MHz C82 C83 C84 C85 C86 C87 C88 C89 C90 C91 +
C64 C65 C66 C92
0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 100uF 22uF 22uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 100uF 0.1uF 0.1uF 0.1uF 10uf 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 1uf 1uf 100uF
0805 0805
VCC18
L7

VCC33 VCC18 VCC18_ISO_M1

C94 C95 C96 C97 600 OHM @ 100MHz

0.1uF 0.1uF 0.1uF 10uf

D D

AC10
AC14
AC15
AC16
AC20
AC21
AC22
AC23
AC24

AD10
AD14
AD15
AD16
AD20
AD21
AD22
AD23
AD24
AD26

AC12
AC18

AD12
AD18
AA23
AA24
AC3
AC9

AD9

M23
M24

AC5
AC6
AC7

AD4
AD5
AD6
AD7
AA3
AA4
AB3
AB4

G23
G24
C24

D23
D24

H23
H24

U23
U24

C11
C13
C15
C19

D11
D13
D15
D19

C14
C16

D14
D16

C21
C22
D21

C12
C18
D12
D18
E23
E24

P23
P24

V23
V24

K23
K24

Y23
Y24
F23
F24

T23
T24

L23
L24
M3
M4
D3

R3
R4

C4
C5

D5

C9

D9

H3
H4
E3
E4

K3
K4

P3
P4

Y3
Y4

V3
V4
F3
F4

T3
T4
cpu address rom address

VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33
VCC33

VCC25
VCC25
VCC25
VCC25
VCC25
VCC25
VCC25
VCC25
VCC25
VCC25
VCC25
VCC25
VCC25
VCC25
VCC25
VCC25
VCC25

VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
VCC18
sh.1,3,4,5 CPU_A_[22:0] ROM_A_[26:0] sh.4
CPU_A_16 AF16 B20 ROM_A_26
CPU_A_15 AE15 A_16 ROM_A_26 A21 ROM_A_25
CPU_A_14 AF15 A_15 ROM_A_25 B21 ROM_A_24
CPU_A_13 AE14 A_14 ROM_A_24 A22 ROM_A_23
CPU_A_12 AF14 A_13 ROM_A_23 B22 ROM_A_22
CPU_A_11 AF13 A_12 ROM_A_22 A23 ROM_A_21
CPU_A_10 AE13 A_11 ROM_A_21 B23 ROM_A_20
CPU_A_9 AF12 A_10 ROM_A_20 A24 ROM_A_19
AE12 A_9 ROM_A_19 B24
MARA
CPU_A_8 ROM_A_18
CPU_A_7 AF11 A_8 ROM_A_18 A25 ROM_A_17
CPU_A_6 AE11 A_7 ROM_A_17 B25 ROM_A_16
CPU_A_5 AE2 A_6 ROM_A_16 A26 ROM_A_15
CPU_A_4 AF1 A_5 ROM_A_15 B26 ROM_A_14
CPU_A_3 AE1 A_4 ROM_A_14 C25 ROM_A_13
CPU_A_2 AD2 A_3 ROM_A_13 C26 ROM_A_12
CPU_A_1 AD1 A_2 ROM_A_12 D25 ROM_A_11
CPU_A_0 AC2 A_1 ROM_A_11 D26 ROM_A_10
A_0 U5 ROM_A_10 E25 ROM_A_9
cpu data ROM_A_9 E26 ROM_A_8
sh.1,3,4,5 CPU_D_[31:0] ROM_A_8
CPU_D_31 M2 F25 ROM_A_7
CPU_D_30 M1 DHI_15 ROM_A_7 F26 ROM_A_6
CPU_D_29 L1 DHI_14 ROM_A_6 G25 ROM_A_5
CPU_D_28 L2 DHI_13 ROM_A_5 G26 ROM_A_4
CPU_D_27 K1 DHI_12 ROM_A_4 H25 ROM_A_3
CPU_D_26 K2 DHI_11 ROM_A_3 H26 ROM_A_2
CPU_D_25 J1 DHI_10 ROM_A_2 J25 ROM_A_1
CPU_D_24 J2 DHI_9 ROM_A_1 J26 ROM_A_0
CPU_D_23 H1 DHI_8 ROM_A_0
CPU_D_22 H2 DHI_7 rom data
DHI_6 ROM_D_[15:0] sh.4
CPU_D_21 G1 M25 ROM_D_15
CPU_D_20 G2 DHI_5 ROM_D_15 M26 ROM_D_14
CPU_D_19 F1 DHI_4 ROM_D_14 N25 ROM_D_13
CPU_D_18 F2 DHI_3 ROM_D_13 N26 ROM_D_12
CPU_D_17 E1 DHI_2 ROM_D_12 P25 ROM_D_11
C C
CPU_D_16 E2 DHI_1 ROM_D_11 P26 ROM_D_10
CPU_D_15 Y2 DHI_0 ROM_D_10 R26 ROM_D_9
CPU_D_14 Y1 DLO_15 ROM_D_9 R25 ROM_D_8 VCC33
CPU_D_13 W2 DLO_14 ROM_D_8 T26 ROM_D_7
CPU_D_12 W1 DLO_13 ROM_D_7 T25 ROM_D_6 RN12
CPU_D_11 V2 DLO_12 ROM_D_6 U26 ROM_D_5 ROM_D_4 1 8
CPU_D_10 V1 DLO_11 ROM_D_5 U25 ROM_D_4 ROM_D_3 2 7
CPU_D_9 U2 DLO_10 CFG_4/ROM_D_4 V26 ROM_D_3 ROM_D_2 3 6
CPU_D_8 U1 DLO_9 CFG_3/ROM_D_3 V25 ROM_D_2 ROM_D_0 4 5
CPU_D_7 T2 DLO_8 CFG_2/ROM_D_2 W26 ROM_D_1 10K
CPU_D_6 T1 DLO_7 CFG_1/ROM_D_1 W25 ROM_D_0 M1_ROM_D_1 is Don't Care on Power Up
CPU_D_5 R2 DLO_6 CFG_0/ROM_D_0
CPU_D_4 R1 DLO_5 rom control RN13
CPU_D_3 P2 DLO_4 L25 1 8
CPU_D_2 P1 DLO_3 ROM_WE_EVN_L K26 2 7
CPU_D_1 N2 DLO_2 ROM_CS_1/WE_ODD_L L26 3 6 ROM_CS1_L sh.4
CPU_D_0 N1 DLO_1 ROM_CS_0/QSA_EVN_L K25 4 5 ROM_CS0_L sh.4
DLO_0 ROM_OE_L 22 ROM_OE_L sh.4
cpu control ddr sdram address DDR_BA_[1:0] sh.3
AA1 B11 DDR_BA_1
sh.1,5 MARA_CS_L CE_L DDR_BA_1
AC1 A11 DDR_BA_0
sh.3 MARA_WR_L WR_L DDR_BA_0 DDR_A_[12:0] sh.3
AB2
sh.1,3,5 CPU_WAIT_L READY/DTACK_L B12 DDR_A_12
dma DDR_A_12 A12 DDR_A_11
AB1 DDR_A_11 B13 DDR_A_10
sh.1,5 M1_DREQ_L AA2 DREQ_L DDR_A_10 A13 DDR_A_9
sh.1,5 M1_DACK_L DACK_L DDR_A_9 A14 DDR_A_8
R102 standard audio DDR_A_8 B14 DDR_A_7
sh.1 M1_SDOUT_4 C93 AF20 DDR_A_7 A15 DDR_A_6
0.1uF AE19 SD_OUT_7 DDR_A_6 B15 DDR_A_5
220 SD_OUT_6 DDR_A_5
AF19 A16 DDR_A_4
sh.4 M1_SD_OUT_[3:0] M1_SD_OUT_4 AE18 SD_OUT_5 DDR_A_4 B16 DDR_A_3
M1_SD_OUT_3 AF18 SD_OUT_4 DDR_A_3 A17 DDR_A_2
M1_SD_OUT_2 AE17 SD_OUT_3 DDR_A_2 B17 DDR_A_1
M1_SD_OUT_1 AF17 SD_OUT_2 DDR_A_1 A18 DDR_A_0
R103 VCC33 M1_SD_OUT_0 AE16 SD_OUT_1 DDR_A_0
110 SD_OUT_0 ddr sdram data DDR_D_[15:0] sh.3
B R22 AD25 C1 DDR_D_15 B
AE26 SD_IN_7 DDR_D_15 C2 DDR_D_14
10K AE25 SD_IN_6 DDR_D_14 B1 DDR_D_13
AF26 SD_IN_5 DDR_D_13 B2 DDR_D_12
AE24 SD_IN_4 DDR_D_12 A1 DDR_D_11
AF25 SD_IN_3 DDR_D_11 B3 DDR_D_10
R23 AF24 SD_IN_2 DDR_D_10 A2 DDR_D_9
M1_SD_IN_0 AE23 SD_IN_1 DDR_D_9 A3 DDR_D_8
SD_IN_0 DDR_D_8 B6 DDR_D_7
10K DDR_D_7
AE20 A6 DDR_D_6
AF21 I8S_SCLK DDR_D_6 B7 DDR_D_5
AE21 I8S_SYNC DDR_D_5 A7 DDR_D_4
sh.4 M1_I2S_BCLK AF22 I2S_SCLK DDR_D_4 B8 DDR_D_3
sh.4 M1_I2S_LRCK AE22 I2S_SYNC DDR_D_3 A8 DDR_D_2
AF23 LJ_SCLK DDR_D_2 B9 DDR_D_1
LJ_SYNC DDR_D_1 A9 DDR_D_0
hi speed audio DDR_D_0
AB26 ddr sdram control
AB25 SMOOCH_OUT_3 B4
VCC33 AC26 SMOOCH_OUT_2 DDR_DQS_3 A4
AC25 SMOOCH_OUT_1 DDR_DQS_2 B5 DDR_DQS_2 sh.3
R26 SMOOCH_OUT_0 DDR_DQS_1 A5
M1_SMCH_IN Y26 DDR_DQS_0 A10 DDR_DQS_0 sh.3
Y25 SMOOCH_IN_3 DDR_CAS_L A20 DDR_CAS_L sh.3
DNS SMOOCH_IN_2 DDR_RAS_L DDR_RAS_L sh.3
TP1 10K AA26 B19
HEADER_POST 1 MARA1_GTOP AA25 SMOOCH_IN_1 DDR_WE_L DDR_WE_L sh.3
SMOOCH_IN_0 A19
AF10 DDR_CLK_H B18 DDR_CLK_H sh.3
VCC18 GTOP DDR_CLK_L B10 DDR_CLK_L sh.3
R33 pll DDR_CKE DDR_CKE sh.3
MARA1_VDDAN AE4 D2
VDDAN VREF DDR_VREF sh.3
10 DNS
C100 C98 C99 C101 AF3
+ VSSAN jtag

10uf 0.1uF 0.1uF AF4 AE7

22uF AE5 PLL_BYPASS TDO AF9
AF5 PLL_TST_1 TDI AF7
AE10 PLL_TST_0 TCK AE3
A A
TST_CLK_OUT TMS AF8 M1_TRST_L
AE9 system TRST_L
AE8 CLK internal scan
REFCLK_OUT AE6 R11
sh.3 M1_CLK12_288_IN TEST_MODE
AF6 AF2 1.0K
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND

GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND

GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND

GND
GND
GND
GND
RESET_L SCANENABLE
DNS
M1_REFCLK_OUT Young Chang R&D Institute
R34 22 1432 Main St.
W23
W24
L16

L11

L12
L13
L14
L15
J23
J24

M11
M16

M12
M13
M14
M15
AC11
AC13
AC17
AC19

AD11
AD13
AD17
AD19
C23
D22

N11
N16

R11
R16
R23
R24

W3
W4

N12
N13
N14
N15
N23
N24

R12
R13
R14
R15

C20

D20

C10
C17
D10
D17
AB23
AB24

L3
L4

P11
P16

P12
P13
P14
P15
J3
J4

T11
T12
T13
T14
T15
T16
G3
G4
AC4
AC8

AD3
AD8

N3
N4

U3
U4

C3
D4

D1
C6
C7
C8

D6
D7
D8
MARA Waltham MA 02451
USA Copyright 2010 Young Chang Co., Ltd.
sh.3,5 DSP_RESET_L Reproduction without the express written consent of Young Chang Co., Ltd. is prohibited.
Title PC3LE ENGINE BOARD
MARA
Size By Document Number Rev
R. Folk 021402 F V1
Date: Wednesday, April 04, 2012 Sheet 2 of 5
5 4 3 2 1

7-4
 SP5-8 Service Manual
Engine PCB—MARA Clock, Delay Memory, ScanPort, CPLD (3 of 5)

5 4 3 2 1

SCAN PORT INTERFACE VCC33 VCC33

VCC33

8
7
6
5

8
7
6
5
VCC33 L14
L8 RN23 RN24 600 OHM @ 100MHz
10K 10K
VCC33_ISO_U14 C102

1
2
3
4

1
2
3
4
VCC33 600 OHM @ 100MHz C103 0.1uF J7
U6

20
0.1uF sh.1,2,4,5 CPU_D_[7:0] RN25 150 1
DNS CPU_D_7 18 2 8 1 SPD_0 2

VCC
R35 CPU_D_6 17 B0 A0 3 7 2 SPD_1 3
D J8 Y2 CPU_D_5 16 B1 A1 4 6 3 SPD_2 4 D
10K B2 A2
CPU_D_4 15 5 5 4 SPD_3 5
1 1 4 CPU_D_3 14 B3 A3 6 8 1 SPD_4 6
2 EN VCC33 R36 CPU_D_2 13 B4 A4 7 7 2 SPD_5 7
2 3 CPU_D_1 12 B5 A5 8 6 3 SPD_6 8
GND OUT DAC_CLK12_288 sh.4 CPU_D_0 11 B6 A6 9 5 4 SPD_7 9
33 B7 A7
HEADER2 12.2880 MHz 10
1 RN26 150 11

GND
M1_CLK12_288_IN sh.2 DIR
OSC DISABLE OE
19 12
J9 DNS 13
14

10
1 74HC245 15
2 16
17
sh.1,5 SCAN_CS_L
18
sh.4 CPU_WR_BUF_L
HEADER2 SPANA_IN_P 19
20
FUNC GEN SPANA_IN_N 21
22
sh.1 SPANA_OUT1
23
sh.1,4 BRITE
24
(SPANA_OUT2) VCC33 25
26

C104 HEADER 13X2

VCC33
SH_AVCC sh.1
0.1uF
U8 R37

20
C105 RN27 150
18 2 8 1 B_SPRES_L R38 D3
SPRES_L 3.32K

VCC
0.1uF 17 B0 A0 3 7 2 B_SPREN_KY_L
SPREN_KY_L B1 A1 BAS70H
U7A 16 4 6 3 B_SPREN_SW_L U9A
SPREN_SW_L B2 A2 10.0K
8
1

15 5 5 4 B_SPEN_AN_L 2 - R41
SPEN_AN_L B3 A3
14 6 8 1 B_SPREN_LED_L 1
SPWEN_LED_L B4 A4 SH_AN0 sh.1
2 6 R39 22 R40 10K 13 7 7 2 B_SP_TBD1 R42 3
MARA_WR_L sh.2 B5 A5 + 1.00K
12 8 6 3 NJM4580E
11 B6 A6 9 5 4 B_SPBLANK_L D4
C 10.0K C
B7 A7 R43 BAS70H
4

NC7WZ125 1 RN28 150

GND
sh.1,5 CPU_WR_L DIR SH_AVCC sh.1
19
OE 6.65K
U7B R44 Connect to SH-2A AVREF pin

10
7

8
7
6
5

8
7
6
5
74HC245 6.65K
RN29 RN30
5 3 R45 22 10K 10K
CPU_WR_BUF_L sh.4
SPEN_L VCC33

1
2
3
4

1
2
3
4
NC7WZ125 Place Circuit Close to SH-2A ADC pins
VCC33

B_SP_TBD2

C106

U10 0.1uF +12V

5
VCC25

1
2 4 SPBLANK_L C107
sh.1 SPBLANK

8
U9B
6 - 0.1uF

2
C113 C112 C114 C115 C116 C117 NC7S04 7

3
5 +
0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF NJM4580E

1
SPEN_L C111

0.1uF

2
VCC33
sh.2 DDR_D_[15:0] -12V

sh.2 DDR_A_[12:0]
ARPY C108 C109 C110
B DDR RAM VCC25 VCC25
CPLD 0.1uF 0.1uF 0.1uF B
VCC25

U11

15
35

26
U12
18
33

15
55
61
1

3
9

C118

VCCIO
VCC
VCC
R46 R101
VDDQ
VDDQ
VDDQ
VDDQ
VDDQ
VDD
VDD
VDD

10K SPREN_KY_L 38 28
0.1uF SPREN_SW_L 37 I/O I/O 27 FLWR_L sh.1 0
49 65 DDR_D_15 SPWEN_LED_L 32 I/O I/O 23
sh.2 DDR_VREF VREF DQ15 I/O I/O MARA_1_CS_L sh.1, 5
63 DDR_D_14 31 22
17 DQ14 62 DDR_D_13 SPRES_L sh.1 BOOT_FL_CS_L 30 I/O I/O 21 MARA_CS_L sh.2
C119 DDR_A_12 42 A13* DQ13 60 DDR_D_12 29 I/O I/O 20 UART_RD_L sh.1
R47 DDR_A_11 41 A12* DQ12 59 DDR_D_11 sh.1 BOOT_E_CS_L I/O I/O 19 UART_WR_L sh.1
A11 DQ11 I/O DSP_RESET_SEL_L sh.1,5
10K DDR_A_10 28 57 DDR_D_10 3 18
A10 DQ10 sh.1,5 ADTRG_L I/O I/O CPU_A_21 sh.1,5
0.1uF DDR_A_9 40 56 DDR_D_9 2
DDR_A_8 39 A9 DQ9 54 DDR_D_8 sh.1 BOOT_FL_OE_L 42 I/O 16
A8 DQ8 sh.1,5 FLASH_CS_L I/O I/O FLRD_L sh.1
DDR_A_7 38 13 DDR_D_7 41 14
A7 DQ7 sh.1,4,5 CPU_RD_L I/O I/O BOOT_CS_L sh.1,5
DDR_A_6 37 11 DDR_D_6 40 13
A6 DQ6 sh.4 LCDE I/O I/O LCD_CS_L sh.1,4,5
DDR_A_5 36 10 DDR_D_5 SPEN_AN_L 39 12
A5 DQ5 I/O I/O CPU_A_19 sh.1,5
DDR_A_4 35 8 DDR_D_4 8 DSP_RESET_L sh.2,5
DDR_A_3 32 A4 DQ4 7 DDR_D_3 I/O 7
A3 DQ3 I/O CPU_WR_BUF_L sh.4
DDR_A_2 31 5 DDR_D_2 1 6
A2 DQ2 sh.1,5 RESET_L I/O/GCK3 I/O
DDR_A_1 30 4 DDR_D_1 44 5
sh.2 DDR_BA_[1:0] A1 DQ1 sh.1,5 SDRAM_CLK BiDir I/O/GCK2 I/O EPROM_INST_L sh.1
DDR_A_0 29 2 DDR_D_0 sh.1,2,5 CPU_WAIT_L 43
A0 DQ0 34 I/O/GCK1
sh.1,5 SCAN_CS_L I/O/GTS2
DDR_BA_1 27 51 36
BA1 UDQS DDR_DQS_2 sh.2 sh.1,5 UART_CS_L I/O/GTS1
DDR_BA_0 26 16 33
BA0 LDQS DDR_DQS_0 sh.2 sh.1,5 CPU_A_20 I/O/GSR
22 47 9 24
sh.2 DDR_CAS_L CAS UDM TDI TDO
23 20 VCC33 11
sh.2 DDR_RAS_L RAS LDM TCK
21 10

GND
GND
GND
sh.2 DDR_WE_L WE TMS
sh.2 DDR_CLK_L
24
sh.2 DDR_CLK_H CS MT46V8M16P-75 C120 XC9536XL

17
25
4
46
sh.2 DDR_CKE CK
45 0.1uF
CK
A A
44 J10
CKE
1 2
VSSQ
VSSQ
VSSQ
VSSQ
VSSQ
VSS
VSS
VSS

3 4 CPLD_TMS
5 6 CPLD_TCK
7 8 CPLD_TDO
Young Chang R&D Institute
34
48
66

12
52
58
64
6

9 10 CPLD_TDI
11 12 1432 Main St.
13 14 Waltham MA 02451
USA Copyright 2010 Young Chang Co., Ltd.
Reproduction without the express written consent of Young Chang Co., Ltd. is prohibited.

HEADER 7X2 Title PC3LE ENGINE BOARD

MARA CLOCK, DELAY MEMORY, SCAN PORT, CPLD
Xilinx Parallel Cable
Size By Document Number Rev
R. Folk 021402 F V1
Date: Wednesday, April 04, 2012 Sheet 3 of 5
5 4 3 2 1

7-5
SP5-8 Service Manual
Engine PCB—Sound ROM, LCD INTF, Audio Outputs, USB I/F (4 of 5)

5 4 3 2 1

VCC33
sh.2 ROM_A_[24:0]
R48 DNS U15
R104 0 TWEET_LEFT_P

23 2 R86 100 LINE_LEFT_P J11

VCC33 VCC33 10K 24 DSDL4 LOUT1+ 1
DNS DSDR4 LOUT1-
R87 100 LINE_LEFT_M
R105 0 TWEET_LEFT_M 29 1
30 DSDL3 48 R88 100 LINE_RIGHT_P 2 Line/Phones L+
27 DSDR3 ROUT1+ 47 3 Line/Phones L -
DNS DSDL2 ROUT1-
R89 100 LINE_RIGHT_M
AGND
C121 C124 C122 C123 DNS 28 4
25 DSDR2 46 5 Line/Phones R+
ROM BASE-0 ROM BASE-1 R106 0 TWEET_RIGHT_P
DSDL1 LOUT2+
R90 100 WOOF_LEFT_P
Line/Phones R-
U13 0.1uF 0.1uF U14 0.1uF 0.1uF 26 45 R91 100 WOOF_LEFT_M 6

20
26
45

20
26
45
22 DSDR1 LOUT2- 7 Mute
DCLK 44 R92 100 WOOF_RIGHT_P 8 Spkr/Woof L+

VCC
VCC
VCC

VCC
VCC
VCC
sh.2 M1_SD_OUT_[3:0] ROUT2+ Spkr/Woof L-
43 R93 100 WOOF_RIGHT_M 9
36 36 13 ROUT2- 10 Spkr/Woof R+
ROM_A_24
A24(NC)
ROM_A_24
A24(NC)
M1_SD_OUT_3
SDTI4 DNS Spkr/Woof R-
ROM_A_23 12 50 ROM_A_23 12 50 M1_SD_OUT_2 16 42 R94 100 DNS TWEET_LEFT_P
D ROM_A_22 37 A23 CE ROM_A_22 37 A23 CE M1_SD_OUT_1 15 SDTI3 LOUT3+ 41 R95 100 TWEET_LEFT_M D
ROM_A_21 39 A22 35 ROM_A_21 39 A22 35 M1_SD_OUT_0 14 SDTI2 LOUT3-
A21 OE A21 OE SDTI1 DNS HEADER 10
ROM_A_20 40 ROM_A_20 40 40 R97 100 DNS TWEET_RIGHT_P
41 A20 14 41 A20 14 9 ROUT3+ 39 R96 100
ROM_A_19 ROM_BHE ROM_A_19 ROM_BHE
sh.2 M1_I2S_BCLK
TWEET_RIGHT_M AUDIO OUT A
ROM_A_18 42 A19 BHE ROM_A_18 42 A19 BHE 17 BICK ROUT3-
A18 A18 sh.2 M1_I2S_LRCK LRCK DNS
ROM_A_17 43 ROM_A_17 43 10 38 R98 100 DNS SUBW_P
A17 A17 sh.3 DAC_CLK12_288 MCLK LOUT4+
ROM_A_16 44 ROM_A_16 44 31 37 R99 100 SUBW_M
ROM_A_15 46 A16 34 ROM_D_15 ROM_A_15 46 A16 34 ROM_D_15 DIF0 LOUT4-
A15 D15 A15 D15 sh.1 DAC_PDN
ROM_A_14 47 32 ROM_D_14 ROM_A_14 47 32 ROM_D_14 6 33 DNS J12
ROM_A_13 48 A14 D14 30 ROM_D_13 ROM_A_13 48 A14 D14 30 ROM_D_13 21 CAD0 ROUT4+ 32
A13 D13 A13 D13 sh.1 DAC_CSN CSN/CAD1 ROUT4-
ROM_A_12 49 28 ROM_D_12 ROM_A_12 49 28 ROM_D_12 20 DNS 1
A12 D12 A12 D12 sh.1 DAC_CDTI CDTI/SDA Tweet L+
ROM_A_11 1 24 ROM_D_11 ROM_A_11 1 24 ROM_D_11 19 DAC_CCLK R107 0 2
A11 D11 A11 D11 sh.1 DAC_CCLK CCLK Tweet L-
ROM_A_10 2 22 ROM_D_10 ROM_A_10 2 22 ROM_D_10 18 3
3 A10 D10 19 3 A10 D10 19 I2C 4 Tweet R+
ROM_A_9
A9 D9
ROM_D_9 ROM_A_9
A9 D9
ROM_D_9 DNS Tweet R-
ROM_A_8 4 17 ROM_D_8 ROM_A_8 4 17 ROM_D_8 8 3 DAC_CDTI R108 0 5
ROM_A_7 5 A8 D8 33 ROM_D_7 ROM_A_7 5 A8 D8 33 ROM_D_7 PDN DZF3 4 6 SubW +
ROM_A_6 6 A7 D7 31 ROM_D_6 ROM_A_6 6 A7 D7 31 ROM_D_6 7 DZF2 5 7 SubW -
ROM_A_5 7 A6 D6 29 ROM_D_5 ROM_A_5 7 A6 D6 29 ROM_D_5 R49 ACKSN DZF1 AGND
ROM_A_4 8 A5 D5 27 ROM_D_4 ROM_A_4 8 A5 D5 27 ROM_D_4 VCC_DAC 11
ROM_A_3 9 A4 D4 23 ROM_D_3 ROM_A_3 9 A4 D4 23 ROM_D_3 12 DVDD
1.0K DNS HEADER 7

600 OHM @ 100MHz

ROM_A_2 10 A3 D3 21 ROM_D_2 ROM_A_2 10 A3 D3 21 ROM_D_2 C125 DVSS R109 0
ROM_A_1 11 A2 D2 18 ROM_D_1 ROM_A_1 11 A2 D2 18 ROM_D_1 35 Caps placed to provide return AUDIO OUT B

GND
GND
GND

GND
GND
GND
ROM_A_0 15 A1 D1 16 ROM_D_0 ROM_A_0 15 A1 D1 16 ROM_D_0 L9 0.1uF 36 AVDD
A0 D0 A0 D0 AVSS path for traces crossing plane splits.
For EMI reduction only.
34
VREFH

13
25
38

13
25
38
MR26T51203L MR26T51203L VCC

+12V
DNS DNS
U16 AK4358VQ C165 470pF R110 0 R111 0
+5VANA
8 1 +5VANA
IN OUT
DNS

GND
GND
GND
GND
C126 + C129 R50 0 VCC33
C127 C128 VCC
MC78L05 10uF 0.1uF C167 470pF

2
3
6
7
0.1uF 0.1uF
sh.2 ROM_D_[15:0] VCC33
C C
sh.2 ROM_OE_L GND Join should be placed C168 470pF
as close to AK4382 DAC as
sh.2 ROM_CS0_L possible.
R51
sh.2 ROM_CS1_L
20K
sh.1 MUTE
VCC
VCC33
VCC
USB CABLE CONNS
U17 J13
20

sh.1 LCD_D_[3:0] RN31 100 R57

LCD_D_0 9 11 4 5 QVGA_D0 1 10K J14
VCC

LCD_D_1 8 A7 B7 12 3 6 QVGA_D1 2 D0 R56 0 1

LCD_D_2 7 A6 B6 13 2 7 QVGA_D2 3 D1 2 VBUS
A5 B5 D2 sh.1 USB_HOST_EN_L /HOST_EN
6 14 1 8 4 3
LCD_D_3
5 A4 B4 15 4 5
QVGA_D3
QVGA_DISP_OFF_L 5 D3 Controllerless VCC33 4 /HOST_FLG
sh.1 LCD_DISP_OFF_L A3 B3 /DISPOFF GND
sh.1 LCD_FLM 4
A2 B2
16 3 6 6
GND LCD I/F
sh.1 LCD_LP 3 17 2 7 QVGA_FLM 7 HEADER 4
2 A1 B1 18 1 8 QVGA_CP QVGA_LP 8 FLM R55 0
sh.1 LCD_CP A0 B0 LP
R52 QVGA_CP_O 9 C131 R53 0 J26
10K 1 RN32 100 QVGA_M_DISP 10 CP 1
VCC
GND

19 DIR VCC QVGA_VCC_PWC 11 M_DISP 0.1uF 2 DM

G VCC_PWC DP
8
7
6
5
8
7
6
5

QVGA_VEE_PWC 12 VCC VCC 3

13 VEE_PWC U30 SHLD
VCC
10

5
RN37 RN38 R54 74HCT245 C130 14 DNS HEADER 3
100K 100K 330 L17 GND 1
U18 DNS L11 DNS
0.1uF 4 R59 Shielded Twisted Pair
sh.1 USB_HOST_FLAG_L
1
2
3
4
1
2
3
4

1 3 HEADER 7X2 2 2.0K

7 6
NC7SZ08 IN OUT1 8
OUT2

3
8
7
6
5

1 DNS DNS 600 OHM @ 100MHz

VCC 100pF EXC-CET101U 2 EN C133 + 1500mA
FLAG_OUT
2

RN39 C134
100K 3 0.1uF 100uF
C135 GND
1
2
3
4

U19 DNS DNS

20

B RN33 100 0.1uF MIC2025-2YM B

sh.1 LCD_M_DISP 9 11 4 5 C170

VCC

8 A7 B7 12 3 6
sh.1 LCD_VCC_PWC USB PORTS
7 A6 B6 13 2 7 1000pF
sh.1 LCD_VEE_PWC A5 B5
6 14 1 8 J17 DNS
5 A4 B4 15 4 5
4 A3 B3 16 3 6 VCC33 1 5
sh.1,2,5 CPU_A_1 A2 B2 VBUS S1
3 17 2 7 DNS U20 DNS USB_A_DM 2
sh.3 CPU_WR_BUF_L A1 B1 D-
2 18 1 8 R60 USB_A_DP 3
sh.3 LCDE A0 B0 D+
10 4 6
R61 1 RN34 100 VCC 2 GND S2
VCC DNS
GND

DIR 100 HSD1+

19 VCC 8
10K G DNS 4 HSD1- C171 USB-A
sh.1 USB_DP 6 D+ 3
DNS VCC
sh.1 USB_DM D- HSD2+
10

R62 74HCT245 C136 DNS 7 1000pF

C137 HSD2-
330 DNS
0.1uF C132 DNS L10 1 DNS
0.1uF 5 S 9 J18
J15
0.1uF GND OE DEVICE_VBUS 1 5
1 FBEAD_SMT USB_B_DM 2 VBUS S1
2 VCC D-
GND
2.5 Turn Ferrite Bead
DNS FSUSB30MUX
3 R64 0
sh.1,3 BRITE BRITE USB_B_DP 3
4 D+ 6
HEADER 3 GND S2
DNS
LCD_CONT VCC USB-B
DNS
VCC33 C138 C139 DNS
DNS VCC
25V
J19 DNS
0.1uF 0.1uF C140 R65 Install for
C144 VCC33 1 0 USB-B Only Products
2 VSS U22 0.1uF
VDD 5
0.1uF U21 DNS 3
24

VEE
1

DNS LCD_RS 4
5 RS 1 VCC 4
LCD_R_W
CHARACTER
VCCA

VCCB

RN35 100 LCD_E 6 R/W IN1 Z USB_VBUS sh.1

sh.1,2,3,5 CPU_D_[31:0] E
A CPU_D_0 10
A7 B7
14 4 5 LCD_D0 7
D00 LCD INTERFACE 3
IN0 A
CPU_D_1 9 15 3 6 LCD_D1 8
CPU_D_2 8 A6 B6 16 2 7 LCD_D2 9 D01
CPU_D_3 7 A5 B5 17 1 8 LCD_D3 10 D02 6
A4 B4 D03 DNS S GND
CPU_D_4 6 18 4 5 LCD_D4 11
CPU_D_5 5 A3 B3 19 3 6 LCD_D5 12 D04 VCC J20
4 A2 B2 20 2 7 13 D05 2
CPU_D_6
CPU_D_7 3 A1 B1 21 1 8
LCD_D6
LCD_D7 14 D06 DNS
R66 3
NC7SZ157
Young Chang R&D Institute
A0 B0 15 D07 2 1432 Main St.
2 VCC RN36 100 16 BKLT+ 1 Waltham MA 02451
GND
GND
GND

sh.1,3,5 CPU_RD_L DIR BKLT- 10

22 DNS DNS C142 USA Copyright 2010 Young Chang Co., Ltd.
sh.1,3,5 LCD_CS_L OE DNS 0.1uF Reproduction without the express written consent of Young Chang Co., Ltd. is prohibited.

C141 HEADER 8X2 L13 25V +12V HEADER3 Title PC3LE ENGINE BOARD
11
12
13

74LVX4245 DNS
0.1uF LCD Backlight LED voltage. SOUND ROM, LCD INTF, AUDIO OUTPUTS, USB I/F
Size By Document Number Rev
600 OHM @ 100MHz R. Folk 021402 F V1

Date: Wednesday, April 04, 2012 Sheet 4 of 5

5 4 3 2 1

7-6
 SP5-8 Service Manual
Engine PCB—Power Circuitry, Test Headers , Reset (5 of 5)

5 4 3 2 1

VCC

J22 DNS
C143
VCC +
VCC33
220uF

3
2
1
HEADER3 L12
C145 FBEAD_SMT
+ C146 U23
R67 2.5 Turn Ferrite Bead
22uF 0.1uF 3 2 HEADER 6
VIN VOUT L15
D 0 D
1 1206 6 PWRUPRST_L
ADJ R68 /PWRUPRST 5
+ +12V +12V
4 600 OHM @ 100MHz
LM1086-ADJ 121 C147 AGND 3 L16
100uF -12V 2
5VDIG 1
DGND -12V
600 OHM @ 100MHz

C149 R69 J23

DNS 200 Molex 26-60-4060
10uf
POWER CONN

VCC33 J25 DNS

VCC25

3
2
1
HEADER3

C150 U24
R70
0.1uF 1 5
VIN VOUT
0
3 C151
ON_OFF Low ESR
4 10uf

GND
BYPASS
C C
C152
LP2992-V2_5

2
10000pF

VCC
J27 DNS VCC33 J28 DNS
DNS DNS DNS DNS DNS
VCC VCC33 VCC33
TP2 TP3 TP4 TP5 TP7
HEADER_POST HEADER_POST HEADER_POST HEADER_POST HEADER_POST VCC18 C153 C154 VCC12

3
2
1

3
2
1
DNS DNS HEADER3 0.1uF 10uf HEADER3
1

1
C155
+ C156 U26
U25
1

TP8 TP9 R71 R72

22uF 0.1uF 3 2 2 4
HEADER_POST HEADER_POST VIN VOUT VIN VOUT
0 0
1 4 5

GND
ADJ/GND PAD R73 1 BIAS
+ R74 SD C157
LM1117-ADJ 10K
121 C158 22uf

3
100uF C159 LP3891-V1_2

0.1uF

C160 R75
TP11 TP12 TP13 TP14 TP15 TP16 TP17 TP18 TP19 DNS
10uf 60.4
PTH PTH PTH PTH PTH PTH PTH PTH PTH

B B
1

TP21 TP22 TP23 TP24 TP25 TP26 TP27 TP28 TP29

PTH PTH PTH PTH PTH PTH PTH PTH PTH

VCC
1

C161

0.1uF

U27A

14

14
U28A
1 2
1 2

VCC VCC VCC VCC VCC

Reset 74VHC05 74HC14

7
DNS VCC33 VCC33 DNS
DNS C162 U27B

14
R76 R77 R78 DNS R79
J29 2.0K 20K 0.1uF 1.0K 2.0K 3 4 U28F
J30
1 R80 R81 13 12
2 1.0K 1.0K 1
NMI 74VHC05

7
U28B U28C U28D U27C U27D U27E 2 74HC14
14

14

14

D5
R82
HEADER 2 3 4 3 1 5 6 9 8 5 6 9 8 11 10 U27F 1.0K

14
RESET sh.1 HEADER 2 U28E D6
74HC14 74HC14 74HC14 13 12
R83 + BAS16 74VHC05 74VHC05 74VHC05 11 10 3 1
7

A A
20K C163 CPU_NMI_L sh.1
10uF + 74HC14 74VHC05

7
RESET_L sh.1,3

2
R84 C164 R85
20K 10uF BAS40 1.0K

PWRUPRST_L Young Chang R&D Institute

1432 Main St.
Waltham MA 02451
USA Copyright 2010 Young Chang Co., Ltd.
Reproduction without the express written consent of Young Chang Co., Ltd. is prohibited.
Title PC3LE ENGINE BOARD
Power Circuitry, Test Headers, Reset
Size By Document Number Rev
R. Folk 021402 F V1
Date: Wednesday, April 04, 2012 Sheet 5 of 5
5 4 3 2 1

7-7
SP5-8 Service Manual
Front Panel Right PCB—Button, LED (1 of 2)

6 5 4 3 2 1
REVISION RECORD
VCC5
LTR ECO NO: APPROVED: DATE:
RN7 6.8K
VCC5 1 8
2 7 COL[0:5]
3 6
4 5
Q1 MMBT2907

COL0

COL1

COL2

COL3

COL4

COL5
COL0

2
3
VCC33
C1

1
0.1uF
U1 Q2 MMBT2907
74HCT164 COL1

2
3
14
D 1
2
A Q0
3
4
D

1
B Q1
5
C2 + Q2 Q3 MMBT2907
8 6
100uf CLK Q3

2
COL2

3
10
Q4
9 11
CLR Q5
12

1
Q6

VCC5
13
Q7
Q4 MMBT2907

LR[0:7]
COL3

2
3
L1

7
FBEAD_2.5T_SMT

1
R6 6.8K
C3 Q5 KB3
MMBT2907
COL4

2
3
0.1uF D58

R7 6.8K 1 2

1
R5
LR7 BLVE
10K
Q23 MMBT2907
COL5 PIANO LEADS STRINGS GUITAR VOICES USER

2
3
D20 D21 D22 D23 D24 D59
1 2 1 2 1 2 1 2 1 2 1 2

1
U7-F LR3
13 12 E.PIANO PADS BRASS BASS MALLETS ALL
D25 D26 D27 D28 D29 D60
1 2 1 2 1 2 1 2 1 2
74LS05 1 2
VCC5
LR2
CLAVIER SYNTHS WINDS DRUMS HYBRID CANCEL
LR[0:7] D30 D31 D32 D33 D34 D61
1 2 1 2 1 2 1 2 1 2 1 2
U3
C C
LR1
74HCT374

20
C4 ORGAN SYN BASS ENSEMBLE PERCUSSION MISC. ENTER
D62 D63 D64 D65 D66 D67

VCC
0.1uF 1 2 1 2 1 2 1 2 1 2 1 2
1 OE LR0

SCAN PORT 11
CLK 47
J1 1 RN1
VCC33
2 SPD7 SPD7 18 19 5 4 LR7
D7 D7 Q7
3 SPD6 SPD6 17 16 6 3 LR6
D6 D6 Q6
4 SPD5 SPD5 14 15 7 2 LR5
D5 D5 Q5
5 SPD4 SPD4 13 12 8 1 LR4
D4 D4 Q4
6 SPD3 SPD3 8 9 1 8 LR3
D3 D3 Q3
7 SPD2 SPD2 7 6 2 7 LR2
D2 D2 Q2
8 SPD1 SPD1 4 5 3 6 LR1
D1 D1 Q1

GND
9 SPD0 SPD0 3 2 4 5 LR0
D0 D0 Q0
10
DGND1 RN2
11 SPRES_L
RES

10
12 47
BLANK SWR7
13
DGND2
14 SPREN_KY_L VCC5
REN_KY
15
REN_SW
16 SPREN_AN_L
EN_AN
17
WEN_LED
SPD[0:7]

18 SWR6 RN8
AGND1 VCC33 1 8
19 SPANAIN_P
ANAIN_P 2 7
20 SPANAIN_N
ANAIN_N 3 6
21
AGND2 4 5
22
ANAOUT1
23
ANAOUT2 SWR5 6.8K
24
DGND3 PIANO ORGAN LEADS
25 C60 E.PIANO CLAVIER CHAN
RFU1
26 2 1 2 1 2 1 2 1 2 1 2 1
RFU2 0.1uF
3 4 3 4 3 4 3 4 3 4 3 4
26PIN

B B
SWR4 SW13 SW14 SW15 SW16 SW17 SW41
U4 STRINGS MALLETS WINDS ENSEMBLE GUITAR
20

CHAN
SPD7 2 18 SWR7 2 1 2 1 2 1 2 1 2 1 2 1
VCC

A0 B0
SPD6 3 17 SWR6 3 4 3 4 3 4
A1 B1 3 4 3 4 3 4
SPD5 4 16 SWR5
A2 B2
SPD4 5 15 SWR4 SW18 SW19 SW20 SW21 SW22 SW42
A3 B3
SPD3 6 14 SWR3 SWR3 VCC5
A4 B4
SPD2 7 13 SWR2 VOICES BRASS HYBRID MISC. USER ENTER
A5 B5

SWR[0:7]
SPD1 8 12 SWR1
Control Panel Bridge
A6 B6
SPD0 9 11 SWR0 2 1 2 1 2 1 2 1 2 1 2 1
A7 B7
3 4 3 4 3 4 3 4 3 4 3 4 RN9
J19 19
OE
GND

1 74LVC245A 1 8
1 T/R SW23 SW24 SW25 SW26 SW27 SW43
SPANAIN_P SPANAIN_P SWR[0:7] SWR2 2 7
2 PADS SYNTH SYN BASS CANCEL 3 6
AGND
3
10

SPANAIN_N SPANAIN_N 2 1 2 1 2 1 2 1 4 5
4
AGND 3 4 3 4 3 4 3 4
5 6.8K
LR4 LR4
6
LR5 LR5 SWR1 SW28 SW29 SW30 SW31
7
LR6 LR6
8 BASS DRUMS PERCUSSION ALL
LR7 LR7
9
SWR5 SWR5 2 1 2 1 2 1 2 1
10
SWR6
SWR7
11
12
SWR6
SWR7 Mounting Holes 3 4 3 4 3 4 3 4

RESERVED
COL0 COL0
13 SWR0
SW32 SW33 SW34 SW35
COL1 COL1 1 1 1 1 1 1 1 1
14
COL2 COL2
15
COL3 COL3 L10
16 1
COL4 COL4 FBEAD_2.5T_SMT 1 1 1 1 1 1 1
17
COL5 COL5
18
SPREN_AN_L SPREN_AN_L
19 C73 VCC5 1 1 1 1 1 1 1 1
SPD0 SPD0
20
SPD1 SPD1 L7
21 0.1uF
SPD2 SPD2 FBEAD_2.5T_SMT COMPANY:
SPD3
SPD4
22
23
24
SPD3
SPD4
+15V Young Chang R&D Institute
VCC5 C70
A A
25
+15V
26 0.1uF
-10V TITLE:
27
+10V
POWEROK
GND
28
29
30
POWEROK
L9
FBEAD_2.5T_SMT
L8
FBEAD_2.5T_SMT SP5 FRONT PANEL RIGHT BOARD
DRAWN: DATED:
Buttons, LED
GND -10V
C72 C71 M1 1 M3 1 QQG 2012-6-28
0.1uF
0.1uF

M2 1 M4 1
MARK-SMD CHECKED: DATED:
CODE: SIZE: DRAWING NO: REV:

REVA
<Code> A2 <RD120546>
+10V QUALITY CONTROL: DATED:
<QC By> <QC Date>
RELEASED: DATED:
<Released By> <Release Date> SCALE: <Scale> SHEET: 1 OF 2

7-8
 SP5-8 Service Manual
Front Panel Right PCB (2 of 2)

6 5 4 3 2 1
VCC5 REVISION RECORD

LTR ECO NO: APPROVED: DATE:

MIDI_OUT J2 MIDI_IN J12

FROWN

6
7

7
R17
3 1 3 1 10K Usage table for U12, R23, R24, R107
R18
270 Use only one row
KeyID

5
4

4
2

2
R15 R16 U6 R18 R17 R107 J22
D70 LL4148
D D
VCC33

7
8
2
56 56 PC910 3K 10K 5.6K VCC33 D71 LL4148 J23
6
R20 C7 3 C5 D72 J24

D35
LL4148
VCC5 110 1000PF
R107 6N138 270 DNS 510 0.1uf
U6 510

5
6N139 D73 LL4148 J25
R21 R22
6N139 270 DNS 510 U5 J3 TREBLE

14
R19
13 KBR7 16
T7

VCC
110 QH KBR6 14
56 9 12 KBCOL22 T6
56 CLR QG KBR5 12
11 T5
QF KBR4 10
C11 8 10 T4
C8 CLK QE KBR3 8
6
1000PF VCC5
1000PF IN QD
5 KBR2 6
T3
T2
QC KBR1 4
2 4 T1
B QB KBR0 2

GND
1 3 T0
A QA
C9 1 MIDI_TXD
18

7
R24
220
1000PF OUT 2 MIDI_RXD
74HC164
20
BR10
MK10
R23 19
BR9
VCC5 3 SCAN_TXD 17
10K MK9
15
BR8
4 SCAN_RXD 13
VCC5 MK8
11
VCC33 BR7
5 LCD_CONT 9
MK7
14

R25 7
C10 BR6
6 AES_OUT 5
30.1K MK6
2 1 4 3 0.1uf 3
U7-A U7-B BR5
7 GND 1
U8 MK5

14
8 NC 13

VCC
QH
9 12
J4 CLR QG
74LS05 74LS05 11

KBR[0:7]
CONTRAST VR1 QF

1
8 10
C C
6 5 4 HEADER8 CLK QE
U7-C 10K 6
QD
2 5
QC
2 4
B QB
J5

GND
11 10 5 1 3
U7-E A QA
74LS05 3 TP4 KBR7 16

7
T7
D36 74HC164 KBR6 14
T6
7

8 9 R119 -10V KBR5 12

U7-D T5
KBR4 10
74LS05 DNS T4
KBR3 8
T3
C13 KBR2 6
220uf T2
+ SMB5817 KBR1 4
74LS05 T1
TP2 220UF SMB5817 KBR0 2

D37
+ C14 VCC33 T0

+15V +15V C12

0.1uf 18 NC
R27 20
-10V NC
POWER SWITCH TP5
22 U9 19

14
BR4
17
J6 MK4
13 15

VCC
+10V VCC5 QH BR3
1 3 2 TP3 9 12 13
VIN VOUT 2W CLR QG MK3
2 PQICZ41H2Z 11 11
U11 QF BR2
L2 L3 8 10 9
CLK QE MK2
HEADER2 1 4 1 2 6 7
ADJ VOUT + VIN OUT QD BR1
VCC5 5 5
C16 QC MK1
U10 100UH 1.1A 100UH 1.1A SPRES_L 2 4 3
B QB BR0

GND
LM317 100uf R28 1 3 1
R29 A QA MK0
C15 + 5 4 3.01K
ON/OFF FB + 20PIN-P

7
C17 74HC164
GND

GND

240 220uf
220uf
VCC33 BASS
C19
R31
3

+
6

470uF/25V C20
0.1UF C18
SS24
D38

J7 1.69K
+

10uf R30 0.1uf

L4 TP6 1.00K VCC33
1 SPD[0:7]
B FBEAD_2.5T_SMT
C21
U12 B

20
R110 RN3 150 RN4 3.3K
2 L5 SPD7 5 4 2 18 KBR7 KBR7 5 4

VCC
A0 B0
SPD6 6 3 3 17 KBR6 KBR6 6 3
0 A1 B1
SPD5 7 2 4 16 KBR5 KBR5 7 2
1.5V FBEAD_2.5T_SMT A2 B2
SPD4 8 1 5 15 KBR4 KBR4 8 1
A3 B3
5 4 6 14 5 4
1.0A
USB CONTROL SPD3
SPD2 6 3 7
A4
A5
B4
B5
13
KBR3
KBR2
KBR3
KBR2 6 3
SPD1 7 2 8 12 KBR1 KBR1 7 2
A6 B6
J8 SPD0 8 1 9 11 KBR0 KBR0 8 1
A7 B7
DC POWER OUT VBUS
1 RN5 150 1
DIR
RN6 3.3K

GND
19
TO ENGINE BOARD /HOST_EN
2
VCC33 SPREN_KY_L OE
R32
MINIMUM VCC5 74HC245 D68 LL4148

10
VCC5 3
/HOST_FLG 1
B
LOAD=0.25A 4 10K
GND VCC33 VCC5 +10V +15V C 2 KBCOL22
HEADER6 3
A
L6 HEADER4 D69 LL4148
1 SW44
DGND
2
VCC SPINKNOB
3
CHOKE HASH 1.0MH 0.4R -10V -VANA
4 R36 R38 R35 R37
AGND
5 2 1
+10V +VANA 510 1K 2.2K 3.9K
6
POWEROK /PWRUPPST 1 D- VBUS
D-
C22 J9
103 2 5 S1 6
D+ S2
3
SHLD D+ GND VCC33 VCC5V 10V 15V
2

J10 J11 3 4
HEADER3
Young Chang R&D Institute
COMPANY:
USB-B
1

A TITLE:
A
Only used for debug, DNS for mass production DRAWN: DATED:
SP5 FRONT PANEL RIGHT BOARD
QQG 2012-6-28
CHECKED: DATED:
CODE: SIZE: DRAWING NO: REV:

REVA
<Code> A2 <RD120546>
QUALITY CONTROL: DATED:
<QC By> <QC Date>
RELEASED: DATED:
<Released By> <Release Date> SCALE: <Scale> SHEET: 2 OF 2

7-9
SP5-8 Service Manual
Front Panel Left PCB (1 of 2))

6 5 4 3 2 1
REVISION RECORD
COL5
Control Panel Bridge COL4
COL3
LTR ECO NO: APPROVED: DATE:

1
SPANAIN_P SPANAIN_P
2 COL2
AGND
3
SPANAIN_N SPANAIN_N COL1
4
AGND COL0
5
LR4 LR4
6
LR5 LR5
7
LR6 LR6
8
LR7 LR7
9
SWR5 SWR5
10
SWR6 SWR6 NOMINAL VARIATION
11
SWR7
12 SWR7 LEFTBOARD +5REF 5.1V
ZONE1 ZONE2 ZONE3 ZONE4
COL0 COL0 D0 D1 D2 D3
13 D4
D D
COL1 COL1 +15V
14 LM78L05
COL2 COL2 U13 1 2 1 2 1 2 1 2
15 1 2
COL3 COL3 +15V +5REF
16 8
COL4 COL4 OUT 1
17 IN LR7
Mounting Holes
COL5 COL5
18 SAVE

2 GND

7 GND
3 GND

6 GND
SPREN_AN_L SPREN_AN_L PROGRAM SETUP EDIT SETUP GLOBAL
19 D5 D6
SPD0 SPD0 C24 D7 D8 D9
20
SPD1 SPD1 R33 1 2 1 2 1 2 1 2 1 1 1 1 1 1
21 0.1UF 1 2
SPD2 SPD2
22 2.7K
SPD3 SPD3 LR6 1 1 1 1 1 1
23
SPD4 SPD4 TRANSPOSE- TRANSPOSE+
24 VCC5 SPLIT LAYER OCTAVE SHIFT
VCC5 1 1 1 1 1 1
25 +15V D10 D11 D12
+15V D13 D14
26 1 2 1 2 1 1 1
-10V -10V 1 2 1 2 1 2 1 1 1
27
+10V +10V
28 LR5 1 1 1 1 1 1
POWEROK POWEROK
29 SHIFT3
GND SHIFT1 SHIFT2
30 D16 D17 1 1 1
GND D15
R34 1 2 1 2 1 2
J25 33
LR4

VARIATION ZONE1 ZONE2 ZONE3 ZONE4 CONTROL SHIFT

2 1 2 1 2 1 2 1 2 1 2 1
3 4 3 4 3 4 3 4 3 4 3 4

SW0 SW1 SW2 SW3 SW4 SW36

SWR7
M1 1 M3 1
PROGRAM SETUP EDIT SETUP TRANSPOSE+ SAVE +

+5REF C57 0.1uf

2
3
1
4
2
3
1
4
2
3 4
1 2
3
1
4 3
2
4
1 2
3
1
4
M2 1 M4 1
MARK-SMD
SWR6 SW37 SW5 SW6 SW7 SW8 SW38
SPLIT LAYER TRANSPOSE- GLOBAL OCTAVE SHIFT -
R101
2 1 2 1 2 1 2 1 2 1 2 1
C 10.0K
R100 130.0k
3 4 3 4 3 4 3 4 3 4 3 4 C
SW39 SW9 SW10 SW11 SW12 SW40
3

SWR5
Pitch Center R102 R103
VR3 2 -
50K 2 1
30.1K PITCH
30.1K
3 + U20-A
TLC2272A
1

R104
PITCH 10.0K
1
LOW
2
WIPER
J20 HIGH
3 These components are DNS
4 +5REF
Wheels NC
C58 0.1uf if the instrument does not
MOD
LOW
5 have Aftertouch Pressure
6 R105
WIPER 7
HIGH
R113
130.0k +5REF
C66
2.49K
+5REF
0.1uf
Sensitivity
C59
0.1uf

8
5 U22-B
+
8

5 R111 - 2 U22-A 7 KPSSR

+ -

1
R106 30.1K 7 MOD 1.00k 1 6
VR4 - TLC2272A
6 - U20-B 2 3

4
100K +
TLC2272A
B R116 is DNS B
TLC2272A
4

R116

3
+ 0
R114 4.99k if the instrument has
Aftertouch Pressure
R112 J1 J2
1 1 C67 0.1uf
1.50K
+15V R115
2 2
4.99k
3 3
+15V
4 4

R87 Pressure Sensor(white key) Pressure Sensor2(black key)

2.2K +5REF

2 Q13 2 Q14 2 Q16 2 Q17 2 Q18 2

POWEROK Q15 2
MMBT2907
Q19 Keyboard Pressure
MMBT2907 MMBT2907 MMBT2907 MMBT2907 MMBT2907
1 1 3 1 1 1 1 1
3 3 3 3 3 3
MMBT2907
R93 R94
Q20 R91 R92
R90
R88 MMBT2222 R89 2.2K 2.2K
2.2K 2.2K
2.2K
47K 2.2K
R96
R95 3 1.0K
DNS
Young Chang R&D Institute
150k Q21 COMPANY:
1
MMBT2222 C1
R98 LLPMUTE LLNMUTE RLPMUTE RLNMUTE PHLMUTE PHRMUTE
0.1uf R97
A 3 2
10K
4.7K
TITLE:
A
1 Q22
MMBT2222
C56
+
DRAWN: DATED:
SP5 FRONT PANEL LEFT BOARD
2
R99 47uf QQG 2012-6-26
10k MUTE
CHECKED: DATED:
CODE: SIZE: DRAWING NO: REV:

REVA
<Code> A2 <RD120545>
QUALITY CONTROL: DATED:
<QC By> <QC Date>
RELEASED: DATED:
<Released By> <Release Date> SCALE: <Scale> SHEET: 1 OF 2

7-10
 SP5-8 Service Manual
Front Panel Left PCB (2 of 2)

6 5 4 3 2 1
REVISION RECORD

LTR ECO NO: APPROVED: DATE:

U14-A
R117 2 R35
+5REF -
TP1 1.00K 1
U15
TESTPOINTDNS
3 3 + 150
4 X SPANAIN_P
+5REF Volume PITCH X7
2 NJM4580E R39
MOD X6
5 VCC5
X5 10.0K 1.00%
3 R37 2.2K 1
X4

CTLC
CTLA

CTLB

CTLD
3
Q6 12 +5REF
VR2 X3
MMBT2907 R118 15 +5REF
1 X2
2 14
14.0K X1 16 U21 +10V C27
2 13 VDD
X0 8 +10V
C26 GND 3 C28 22PF
10K 7 4 X
9
D D
1000pF A2 VEE 2 X7 R42 0.1uf
10 A1 X6 R41
R45 11 5

1
A0 CTLE X5 VCC5 10.0K 1.00%
D39 6 EN 1 10.0K 1.00%

8
1.0M CTLD X4 U14-B
LL4148 CTLC 6 -
X3 7 R43
C29 R120 CTLB 15 VR5 VR6 VR7 VR8 VR9 SPANAIN_N
X2
CTLA 14 CTLE
CCPedal 0.1uf 1.00K 74HC4051
KPSSR
13
X1
X0 VDD
16 2 C22 2 C23 2 C25 2 C68 2 C69
5 +
NJM4580E
150
J12 8 10K 10K 10K 10K 10K

4
GND
9 7 0.1uf 0.1uf 0.1uf 0.1uf 0.1uf
A2 VEE
R44 1.0K 10 A1 C32 +
C33

1
1/4* 3 11 R46 -10V
A0 10uf
4 6 EN 0.1uf
5 10.0K 1.00%
2 C31
-10V
6 0.1uf D40
1 C30 EXPDL1 74HC4051 +10V
1000pF LL4148

Sustain R47 D43 D44 Left Line Out

LL4148 LL4148
J13 D42 J14
R49 D41
10K LEFT_ LINE _OUT_P MAIN_ L+
R50 200
100R LL4148 LL4148 SW1 3 1/4*
1/4* 3 4
4 5
R51 MAIN_ L- R53 200
5 C34 2
2 VCC5
1000pF LLPMUTE 2SC3326 6
6 1
1 2.2k/1206 Q7
R48 C36 C37
R52 D47 D48 1000PF 1000PF
10K
100R LL4148 LL4148
SW2 C62 LEFT_LINE_OUT_N C63
VCC5
C 0.1uf 1000PF
C

20
Sustenuto C35
U16
R54 -10V
+10V

VCC
74HCT374
1000pF
J18 LLNMUTE 2SC3326
1/4* D46 D45 1 Q8
3 OE 2.2k/1206
4 LL4148 LL4148
5 11
2 SPREN_AN_L CLK
D49 D50
6
1 18 19
LL4148 LL4148 Right Line Out
D7 Q7 J15
17 16
14
D6 Q6
15 RIGHT_LINE_OUT_P MAIN_ R+
R55 200
D5 Q5 1/4*
13 12 3
SPD4 D4 Q4
8 9 4
SPD3 D3 Q3
7 6 R56 R57 200 5
SPD2 D2 Q2 MAIN_ R-
4 5 2
SPD1 D1 Q1
GND

3 2 RLPMUTE 2SC3326 6
SPD0 D0 Q0
2.2K/1206 Q9 1
C39 C40
10

D51 D52
LL4148 LL4148 C64
1000PF 1000PF
RIGHT_LINE_OUT_N 1000PF

R67
RLNMUTE 2SC3326 -10V
2.2K/1206 Q10
L_LINE

R58
11.8K R59 LEFT_ LINE _OUT_P
R63 R64
1.00K
B R61 R62 C41
270pF 10.0K +10V 0 DNS C38 270PF
+10V
B
LINE_LEFT- 4.53K 4.53K

C50
Keep this ->
U18-A R66 R60
C42 2 - 10.0K R68 node short
8

R70 1 6 U18-B 0.1UF

R71 - 1.00K
1000pF 7 20.0K
AUDIO FROM ENGINE 4.53K 4.53K 3 +
NJM4580E 5 D53 D54
J17 + NJM4580E LEFT_LINE_OUT_N
1 LINE_LEFT+ R108 U17-A LL4148 LL4148
Headphones
4

L+ C43 C55 J16

L_LINE 2 R65 47 ohm/2010
R73 270pF 0.1UF - 3 1/4*
2 1
L- 10.0K
11.8K 3 4
3 + NJM4556 R69 47 ohm/2010 5
GND 2
R_LINE
4 6
R+ 1
R74 11.8K
5 R75 -10V RIGHT_LINE_OUT_P
R-
C44 C45
6 MUTE R72 Q11 D55
MUTE 1.00K C46 270PF D56 C65
PHLMUTE 2SC3326 1000PF 1000PF
R78 R79 LL4148 LL4148
C47 1.5K/1206
1000PF
10.0K 0 DNS R76 20.0K 3
R80 270pF +10V R77
R81 +10V Q12
LINE_RIGHT- 4.53K 4.53K C49
Keep this-> PHRMUTE 1
2SC3326
1.5K/1206 -10V

C51 2 U19-A
R82 0.1UF
node short +10V
2
- 10.0k R83
8

R84 R85 1 6 U19-B

1000pF - 1.00K
LINE_RIGHT+ 4.53K 4.53K 7
Young Chang R&D Institute
3 COMPANY:
+ NJM4580E
5 + NJM4580E C48

A A
4

0.1UF
C52
R86 R109 TITLE:
0.1UF
8

6 U17-B
SP5 FRONT PANEL LEFT BOARD
11.8K C53 R_LINE -
-10V 7
270pF 10.0K 5 + DRAWN: DATED:
-10V NJM4556
QQG 2012-6-26
4

CHECKED: DATED:
CODE: SIZE: DRAWING NO: REV:

C54
REVA
<Code> A2 <RD120545>
QUALITY CONTROL: DATED:
0.1UF
<QC By> <QC Date>
RELEASED: DATED:
-10V <Released By> <Release Date> SCALE: <Scale> SHEET: 2 OF 2

7-11
SP5-8 Service Manual
Automatic Shutdown (ERP Control) PCB

KURZWEIL

ERP CONTROL BOARD

(NOTE: This PCB is present only in units exported to Europe.)

7-12
 SP5-8 Service Manual
Index

Index Disassembly instructions

Engine PCB 4-6
Keyboard Assembly 4-14
LCD 4-10
Left Front Panel PCB 4-10
Right Front Panel PCB 4-8
Disassembly instructions, Keyboard
A Keyboard Contact PCBs 4-18, 4-19, 4-20
removing contact strips 4-21
Assembly instructions Double Press buttons 1-5
Engine PCB 4-7
Keyboard Assembly 4-15
LCD 4-10 E
Left Front Panel PCB 4-12 Engine PCB
Right Front Panel PCB 4-9 cables 4-6
Top Enclosure 4-4 diagram 4-7
Assembly instructions, Keyboard diagram schematic 7-3, 7-4, 7-5, 7-6, 7-7
Keyboard Contact PCBs 4-18, 4-19, 4-20 Function Summary 2-1
replacing contact strips 4-21 photo 4-6
replacing keys 4-17 removing 4-6
Audio Problems:troubleshooting 5-4 replacing 4-7
Automatic Shutdown (ERP Control) PCB Entering Diagnostic Tests 3-1
Function Summary 2-9 Entering the Boot Loader 3-1, 5-2
schematic diagram 7-12

B F
Front Panel
Boot Loader 3-1, 5-2 features 1-2
Bottom Enclosure 4-13 Front Panel PCBs
diagram 4-2, 4-13 Function Summary 2-5
Front Panel Problems
D troubleshooting 5-5
Diagnostic Test Descriptions
Audio Output 3-4 H
Burn-in Test 3-6 Hard Reset 5-2
Internal Flash 3-3
MARA Delay RAM 3-4
MARA Sound ROM 3-4 I
MARA Validity 3-3
Interconnect Diagram 5-7
Scanner DIAG 3-5
SDRAM Refresh 3-3
Diagnostic Test Modes: descriptions 3-2 K
Diagnostic Tests
Keyboard Assembly
entering 3-1
removing 4-14
test results 3-2
replacing 4-15
Diagram
troubleshooting 5-6
Engine PCB 4-7
Keyboard Contact PCBs
Interconnect 5-7
contact strips
key
diagram 4-21
natural 4-15
removing 4-21
sharp 4-16
replacing 4-21
keyboard contact strips 4-21
photo 4-18
keyboard hardware 4-13
removing
Left Front Panel PCB 4-11
Hi 4-20
Right Front Panel Panel PCB 4-9
Lo 4-18
Diagram schematic
Mid 4-19
Automatic Shutdown (ERP Control) PCB 7-12
replacing
Engine PCB 7-3, 7-4, 7-5, 7-6, 7-7
Hi 4-20
Left Front Panel PCB 7-10, 7-11
Lo 4-18
Right Front Panel PCB 7-8, 7-9
Mid 4-19

i
SP5-8 Service Manual
Index

Keys Troubleshooting
diagram Audio 5-4
natural 4-15 Keyboard 5-6
sharp 4-16 Power 5-4
key clips photo 4-16
key spring photo 4-17
removing 4-15
replacing 4-17
Kurzweil International Contacts iv

L
LCD
removing 4-10
replacing 4-10
Left Front Panel PCB
cables 4-11
diagram 4-11
diagram schematic 7-10, 7-11
Function Summary 2-7
removing 4-10
replacing 4-12

P
Photo
Engine PCB 4-6
keyboard chassis 4-18
key clips 4-16
key spring 4-17
Power Problems: troubleshooting 5-4
Printed Circuit Board Descriptions
Automatic Shutdown (ERP Control) PCB 2-9
Engine 2-1
Left Front Panel PCB 2-7
Right Front Panel PCB 2-6

R
Rear Panel
diagram 1-6, 4-2
features 1-6
Resets 5-2
Right Front Panel PCB
cables 4-8
diagram 4-9
diagram schematic 7-8, 7-9
Function Summary 2-6
removing 4-8
replacing 4-9

S
Software Updates 5-3
System Reset 5-2

T
Top Enclosure
removing 4-3
replacing 4-4

ii