Internal Use Only

SERVICE MANUAL
2.1 ch Wireless Sound Bar
SERVICE MANUAL

MODEL: SJ3 (SJ3, SPJ4B-W)

MODEL: SJ3
(SJ3, SPJ4B-W)
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.

P/NO : AFN77558553 JANUARY, 2017

 CONTENTS

SECTION 1 ........ GENERAL

SECTION 2 ........ CABINET & MAIN CHASSIS
SECTION 3 ........ ELECTRICAL
SECTION 4 ........ WIRELESS SUBWOOFER PART

1-1
 SECTION 1
GENERAL

CONTENTS

ESD PRECAUTIONS ......................................................................................................................................... 1-3

WIRELESS SUBWOOFER CONNECTION....................................................................................................... 1-4

HIDDEN KEY MODE ......................................................................................................................................... 1-5

ESS / EQ PROGRAM UPDATE GUIDE............................................................................................................ 1-6

SPECIFICATIONS ............................................................................................................................................. 1-7

1-2
 ESD PRECAUTIONS
Electrostatically Sensitive Devices (ESD)
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components
commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated
circuits and some field-effect transistors and semiconductor chip components. The following techniques should
be used to help reduce the incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off
any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a
commercially available discharging wrist strap device, which should be removed for potential shock reasons
prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive surface
such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can
generate electrical charges sufficient to damage ESD devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD
devices.
6. Do not remove a replacement ESD device from its protective package until immediately before you are
ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by
conductive foam, aluminum foil or comparable conductive materials).
7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the
protective material to the chassis or circuit assembly into which the device will by installed.

CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER
SAFETY PRECAUTIONS.

8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion
such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate
static electricity sufficient to damage an ESD device).

CAUTION. GRAPHIC SYMBOLS

THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS

INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED
“DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF
ELECTRIC SHOCK.

THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE

SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE
LITERATURE.

1-3
 WIRELESS SUBWOOFER CONNECTION
LED indicator of wireless subwoofer Note:
• It takes a few seconds (and may take longer) for the
LED Color Status main unit and the subwoofer to communicate with
each other and make sounds.
Green
Attempting to make connection. • The closer the main unit and the subwoofer, the
(Blink)
better sound quality. It is recommended to install the
Green The connection is completed. main unit and the subwoofer as close as possible
The wireless subwoofer and avoid the cases below.
Red is in standby mode - There is a obstacle between the main unit and the
or the connection is failed. subwoofer.
Off The power cord of wireless - There is a device using same frequency with this
(No display) subwoofer is disconnected. wireless connection such as a medical equipment,
a microwave or a wireless LAN device.
- Keep the sound bar and the subwoofer away from
Setting up the wireless subwoofer the device (ex. wireless router, microwave oven,
etc.) over 1m to prevent wireless interference.
for the first time

1. Connect the power cord to the subwoofer and plug

the power cord into a power outlet.
2. Turn on the main unit : The sound bar and wireless
subwoofer will be automatically connected.
- Green LED on the rear of wireless subwoofer
turns on.

Manually pairing wireless subwoofer

When your connection is not completed, you can

check red LED on the wireless subwoofer and the
wireless subwoofer does not make sound. To solve
the problem, follow the steps below.

1. Press Pairing button on the rear of the wireless

subwoofer.

- The green LED on the rear of the wireless

subwoofer blinks quickly.

2. Turn on the main unit.

3. Pairing is completed.
- The green LED on the rear of the wireless
subwoofer turns on.

1-4
 HIDDEN KEY MODE
HIDDEN MODE KEYS
Option EDIT Main unit 'VOL-' + Remote Control 'NIGHT ON'
Initialize Main unit 'VOL-' + Remote Control 'ASC'
Version Check Main unit 'VOL-' + Remote Control 'Play'
Clip Off
Clip On Main unit 'VOL-' + Remote Control 'Function'
Clip On Gain Monitoring
Enter : Main unit 'VOL-' + Remote Control 'B.Skip'
Wireless RF Change Setting : B.Skip/F.Skip
Exit : Play/Pause"
BYPASS Sound Effect Main unit 'VOL-' + Remote Control 'AUTO POWER OFF'
APD Time Display Main unit 'VOL-' + Remote Control 'WOOFER LEVEL -'
APD On/Off Main unit 'VOL-' + Remote Control 'F.Skip'
Up Play/Pause
Down B.Skip
Right F.Skip
Left WOOFER LEVEL+
Enter AUTO POWER ON
Main unit 'Volume minimum state' + Remote Control 'function'
Demo Mode (Play)
For 7seconds
Wireless Demo Mode Main unit 'VOL-' + Remote Control 'B.Skip'
TV Remocon On/Off Remote Control 'NIGHT OFF' + Remote Control '+' For 3seconds
BT Name Display Remote Control 'B.Skip' + Remote Control '+' For 2seconds
Remote Control 'AUTO POWER OFF' + Remote Control '+'
BT Lock
For 2seconds
Main unit 'Volume minimum state' + Remote Control 'MUTE'
Wireless Factory
For 3seconds
BT SIG Critification Main unit 'VOL-' + Remote Control 'NIGHT OFF' For 3seconds

1-5
 ESS / EQ PROGRAM UPDATE GUIDE
1. Preparation
- Remote control.
- Do format USB Memory to FAT32 File system.
- USB : Update file exist only in the USB Memory stick.
Ex ) SJ3 :
ESS  E:\DSP_SJ3_*.rom (if USB driver is E:\)
EQ  E:\EQ_PRG.BIN (if USB driver is E:\)
Wireless Tx  E:\WIRELESS_TX.bin (if USB driver is E:\)
Wireless Rx  E:\WIRELESS_RX.bin (if USB driver is E:\)

2. Update
1) Power on.
2) Select the USB function.
3) Insert USB.

4) Never remove USB or AC cord while updating.

5) After update finish, power will be off automatically.
6) Power cord un-plug.

1-6
 SPECIFICATIONS
• GENERAL
Power requirements Refer to main label.
Power consumption Refer to main label.
Networked standby : 0.5 W
(If all network ports are activated.)
Dimensions (W x H x D) Approx. 950 mm x 71 mm x 47 mm
Operating temperature 5 °C to 35 °C
Operating humidity 5 % to 90 %
Bus Power Supply 5V 500 mA
Available Digital Input Audio Sampling Frequency 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz
Available Digital Input Audio format Dolby Digital, DTS Digital Surround, PCM

• INPUTS
OPTICAL IN (Digital audio in) 3 V (p-p), Optical jack x 1
PORT. IN (Portable in) 0.5 Vrms (3.5 mm stereo jack) x 1

• AMPLIFIER (RMS Output power)

Total 300 W RMS
Front 50 W RMS x 2 (4 Ω at 1 kHz, 10 % THD)
Subwoofer 200 W RMS (3 Ω at 80 Hz, 10 % THD)

• WIRELESS SUBWOOFER
Power requirements Refer to main label on the subwoofer.
Power consumption Refer to main label on the subwoofer.
Type 1 Way 1 Speaker
Impedance 3Ω
Rated Input Power 200 W RMS
Max. Input Power 400 W RMS
Dimensions (W x H x D) Approx. 171 mm x 320 mm x 252 mm

• Designs and specifications are subject to change without prior notice.

1-7
1-8
 SECTION 2
CABINET & MAIN CHASSIS

CONTENTS

EXPLODED VIEWS ........................................................................................................................................... 2-3

1. MAIN SET SECTION ................................................................................................................................ 2-3
2. WIRELESS SUBWOOFER SECTION ...................................................................................................... 2-5
3. PACKING ACCESSORY SECTION ......................................................................................................... 2-7

2-1
2-2
EXPLODED VIEWS
1. MAIN SET SECTION
NOTES) THE EXCLAMATION POINT WITHIN AN
EQUILATERAL TRIANGLE IS INTENDED
TO ALERT THE SERVICE PERSONNEL
TO THE PRESENCE OF IMPORTANT
SAFETY INFORMATION IN SERVICE
A44B LITERATURE.
261

263

264
502

SPK703
B

C 502 262

CABLE2
A47
B
463 F 502
254 E
502 261
SMPS A
CABLE3
A44A
MAIN
502

258 D
A43

253
A46
463 264

FRONT
A

CABLE1 D 256
252

251 SPK704
F
A42
B/T E

255
A52 A54
502

461 WIRELESS 300

253
C

254
2. WIRELESS SUBWOOFER SECTION
NOTES) THE EXCLAMATION POINT WITHIN AN
EQUILATERAL TRIANGLE IS INTENDED
TO ALERT THE SERVICE PERSONNEL
TO THE PRESENCE OF IMPORTANT
SAFETY INFORMATION IN SERVICE
LITERATURE.

A900

A900W 950

952
951

955 SMPS & AMP

A B

B A45W

960
953
A
960
A54W
961

955
954

959 956
300W

958
3. PACKING ACCESSORY SECTION

801 Owner’s manual 835 Wall bracket

808 Batteries (2) 900 Remote control

803 Packing, Main

804 Bag

802 Box
2-8
 SECTION 3
ELECTRICAL

CONTENTS
ONE POINT REPAIR GUIDE ............................................................................................................................ 3-2
1. NO POWER PROBLEM (PVDD) ............................................................................................................ 3-2
2. POWER ON ERROR .............................................................................................................................. 3-3
3. NO SOUND (PORTABLE FUNCTION) .................................................................................................. 3-4
4. NO WIRELESS ....................................................................................................................................... 3-5
5. NO BLUETOOTH .................................................................................................................................... 3-6
6. NO SOUND (OPTICAL) .......................................................................................................................... 3-7
7. D(DC) PROTECTION ............................................................................................................................. 3-8
8. S(SHUT DOWN) PROTECTION............................................................................................................. 3-9
9. B(BURNT) PROTECTION .................................................................................................................... 3-10

WAVEFORMS OF MAJOR CHECK POINT.................................................................................................... 3-11

1. CRYSTAL .............................................................................................................................................. 3-11
2. FLASH MEMORY ................................................................................................................................. 3-11
3. TACT KEY............................................................................................................................................. 3-12
4. REMOTE CONTROL ............................................................................................................................ 3-13
5. OPTICAL ............................................................................................................................................... 3-14
6. PORTABLE ........................................................................................................................................... 3-15
7. AUDIO PWM ......................................................................................................................................... 3-16

WIRING DIAGRAM .......................................................................................................................................... 3-17

BLOCK DIAGRAMS ........................................................................................................................................ 3-19

1. SYSTEM BLOCK DIAGRAM ................................................................................................................ 3-19
2. POWER BLOCK DIAGRAM ................................................................................................................. 3-21

CIRCUIT VOLTAGE CHART ........................................................................................................................... 3-23

1. CONNECTORS ..................................................................................................................................... 3-23
2. OTHERS ............................................................................................................................................... 3-25

PRINTED CIRCUIT BOARD DIAGRAMS ....................................................................................................... 3-27

1. SMPS P. C. BOARD DIAGRAM ........................................................................................................... 3-27
2. MAIN P. C. BOARD DIAGRAM ............................................................................................................ 3-29
3. FRONT P. C. BOARD DIAGRAM ......................................................................................................... 3-31

3-1
 ONE POINT REPAIR GUIDE
1. NO POWER PROBLEM (PVDD)
No power problem occurs when you power on the unit.

1-1. Solution
Replace SMPS board.

1-2. How to troubleshoot (Countermeasure)

1) Check the PVDD voltage 24.5 V at pin4, 5, 6.
When you check the no power at this point, then replace SMPS board.

1-3. Service hint (Any picture / Remark)

< PVDD circuit >

PVDD
CN601 pin4, 5, 6

< MAIN board top view >

3-2
 ONE POINT REPAIR GUIDE
2. POWER ON ERROR
No display or Not working.

2-1. IC608 (NO 12 VA)

1) Check 12 VA at L604.
2) If 12 VA is not checked at the point, then find 24.5 V at pin2 of IC608.
3) 1), 2) is NG.  Replace IC608.

L604

IC608

< MAIN board top view >

2-2. IC605 (NO 5.1 VA)

1) Check 5.1 VA at L603.
2) If 5.1 VA is not checked at the point, then find 12 VA at pin3 of IC605.
3) 1), 2) is NG.  Replace IC605.

IC605

L603

< MAIN board top view >

2-3. IC609 (NO 3.3 VA/ 1.3 VA)

1) Check 3.3 VA at the L606 and 1.3 VA at the L605.
2) If 3.3 VA, 1.3 VA is not checked at the point, then find 5.1 VA at pin7 of IC609.
3) 1), 2) is NG.  Replace IC609.

IC609

L606

L605
< MAIN board top view >

3-3
 ONE POINT REPAIR GUIDE
3. NO SOUND (PORTABLE FUNCTION)
3-1. Solution
Replace IC508 or portable jack (JK500).

3-2. How to troubleshoot (Countermeasure)

1) Please check the soldering status of JK500.
2) Please check L507, L508 (PORT_L, PORT_R signal) of portable jack (JK500).
If you can’t find input signal, replace JK500.

3-3. Service hint (Any picture / Remark)

L507

JK500
L508

< Portable circuit >

L508
L507

< MAIN board top view >

3-4
 ONE POINT REPAIR GUIDE
4. NO WIRELESS
4-1. Solution
Replace WIC500 on MAIN board.(No 3.3 V)

4-2. How to troubleshoot (Countermeasure)

1) Please check externally status of Wireless cable connection on your eyes.
(at CN503 and Wireless module)
2) Please check 3.3 V of WL_3V3 (at WL501).
If 3.3 V is ok at WL501, please check SPI signal (WL_SPI_CS/D0/WP/DI/CLK) of WIC500 (pin1, 2, 3, 5, 6).
3) If you can’t have no signal, please replace WIC500.
4) If 3) is OK, then proceed S/W update.
Update Wireless TX (Main set) and Wireless RX (Subwoofer) each.

4-3. Service hint (Any picture / Remark)

WL501

CN503

< Wireless Interface circuit >

CN503

WIC500

< MAIN board top view >

3-5
 ONE POINT REPAIR GUIDE
5. NO BLUETOOTH
5-1. Solution
Replace IC501 on MAIN board.(No 3.3 V)

5-2. How to troubleshoot (Countermeasure)

1) Please check externally status of Bluetooth cable connection on your eyes.(at CN504 and Bluetooth module)
2) Please check 3.3 V at L509.
If 3.3 V is OK at L509, please check BT_RST, BT_CLK, BT_DAT, UART_RX, UART_TX of IC501 (pin27,
23, 24, 67, 68).
If you have no signal, please replace IC501.

5-3. Service hint (Any picture / Remark)

L509

CN504

< Bluetooth Interface circuit >

CN504

L509

IC501

< MAIN board top view >

3-6
 ONE POINT REPAIR GUIDE
6. NO SOUND (OPTICAL)
6-1. Solution
Replace IC501 on MAIN board.

6-2. How to troubleshoot (Countermeasure)

1) Please check 3.3 V of 3.3VA at R549.
If you can check 3.3 V, please confirm OPT_IN signal (R528) when optical mode.
2) In spite of process 1), set has abnormal output, then replace IC501.

6-3. Service hint (Any picture / Remark)

R549

JK502

R528

< Optical circuit >

R549

JK502

R528

< MAIN board top view >

3-7
 ONE POINT REPAIR GUIDE
7. D(DC) PROTECTION
7-1. Solution
Replace IC703 (AMP IC) on MAIN board.

7-2. How to troubleshoot (Countermeasure)

1) Check DC Voltage of speaker out FL+/- (CN703 pin1, 2), FR+/- (CN704 pin1, 3).
2) Check resistor crack, cold solder of IC501 out (R570 ~ R573).
3) If IC501 out is ok and speaker out (FL+/-, FR+/-) has DC Voltage,
Replace IC703 (AMP IC) on MAIN bottom board.

7-3. Service hint (Any picture / Remark)

CN704 CN703

IC501

R570 ~ R573
< MAIN board top view >

IC703

< MAIN board bottom view >

3-8
 ONE POINT REPAIR GUIDE
8. S(SHUT DOWN) PROTECTION
8-1. Solution
Replace IC703 (AMP IC) on MAIN board.

8-2. How to troubleshoot (Countermeasure)

1) Check PVDD voltage (24 V) of IC703 pin36, 37, 38.
- If PVDD voltage has 8.5 V under, refer to “1. NO POWER PROBLEM (PVDD)” on page 3-2.
2) Check GVDD, VDD voltage (12 V) of IC703 pin1, 2.
- If GVDD, VDD voltage has 8.5 V under, refer to “2. POWER ON ERROR” on page 3-3.
3) Check impedance (4 Ω) of speaker unit.
- If impedance of speaker unit has 1 Ω under, replace speaker unit.
4) If check point 1), 2), 3) is ok, replace IC703 (AMP IC) on MAIN bottom board.

8-3. Service hint (Any picture / Remark)

IC703

< MAIN board bottom view >

3-9
 ONE POINT REPAIR GUIDE
9. B(BURNT) PROTECTION
9-1. Solution
Replace IC703 (AMP IC) on MAIN board.

9-2. How to troubleshoot (Countermeasure)

1) Check voltage 12 V of IC703 at pin1, if 12 V has problem, refer to “2. POWER ON ERROR” on page 3-3.
2) If 12 V is OK, replace IC703 (AMP IC) on MAIN bottom board.

9-3. Service hint (Any picture / Remark)

IC703

< MAIN board bottom view >

3-10
 WAVEFORMS OF MAJOR CHECK POINT
1. CRYSTAL 2. FLASH MEMORY

1 2 VCC

CS#
3

CLK
4
DO
5

FIG 1. X500 (27 MHz) FIG 2. VCC, CS#, CLK, DO

3 2
1

5 4

3-11
3. TACT KEY

6 7

1 ~ 1.13 V
0.72 ~ 0.82 V

FIG 3-1. Press Power Key FIG 3-2. Press FUNC Key

8 6 7 8 9

0.424 ~ 0.485 V

FIG 3-3. Press - Key

0V

FIG 3-4. Press + Key

3-12
4. REMOTE CONTROL

10

FIG 4-1. Input Voltage

11 10 11 12

FIG 4-2. Low Timing

12

Item Measured Spec.

IR Receiver Spec:
Input Level 3.3 V
2.7 ~ 5.5 V
“ Low” Timing 4.4 ms 3.6 ms ~ 5.04 ms
“ High” Timing 4.48 ms 4.08 ms ~ 5.04 ms
FIG 4-3. High Timing

3-13
5. OPTICAL

13 14

FIG 5-1. SPDIF_IN FIG 5-2. OPT_DET

13

14

3-14
6. PORTABLE

15

1.27 Vrms

FIG 6. Analog Input Voltage

15

3-15
7. AUDIO PWM

16 17

FL+ FL- FR+ FR-

384.14 kHz
384.17 kHz

FIG 7-1. Front L FIG 7-2. Front R

16

17

3-16
WIRING DIAGRAM

FRONT
(CEM-1 1.6T 128.5x55)
Array size: 257x128
CN300

Powercord
10P FFC

CN502

SMPS MAIN
PN900

CN900

CN601
(FR1 1layer 1.6T 167x59.5) (FR4 Epoxy 4layer 1.2T 234x59.5)
Array size: 167x147 Array size: 242x133
6P BtoB

CN703

CN704
CN504 CN503

2P 3P 10P FFC 26P FFC

Harness Harness

SPK(FL) SPK(FR) BT Wireless

3-17 3-18
BLOCK DIAGRAMS
1. SYSTEM BLOCK DIAGRAM
27 MHz

BT_UART LPF FL
Bluetooth
Module AMP_PROTECT/FAULT/PDN
BT_RST/CLK / DAT DC_PROTECTION

Audio
Optical In
FL_OUT_P/N, FR_OUT_P/N AMP
SPDIF /OPT_DET FR

Potable In
Potable_L / R, Potable_DET

USB
USB+/-
I2S(BCK/LRCK/ADATA2)

Wireless Wireless
MAIN DSP WL_MUT/RST/INT Module Sub
MSG_RDY/I2C Woofer

SPI

Serial
Flash 1 MB
RMC Front PCB
IR -Receiver RCU_IN P_CTRL
DCDCs
TACT-KEY

KEY (POWER/FUNC/VOL+/ -)
CLK/DAT Serial Flash
2 MB (DSP)
SMPS
LED 4EA
LED_CTRL CLK/DAT Serial Flash 25 V
1 MB (EQ)

3-19 3-20
2. POWER BLOCK DIAGRAM
SMPS PVDD
(24.5V) Q602
AMP
Switching +12 V 10 mA
TR
P_CTRL IC611
USB5V 500 mA
Switch USB

IC602
VD33ADAC 10 mA
LDO
VD33AADC 5 mA
VD33ADAC
IC608 IC605 IC609

DCDC 12 VA 5.1 VA 1.35 V VD13 350 mA

DCDC Duel -DCDC
[2 A] Main DSP
VD13ADC 1 mA

3.3 VA VD33 100 mA

VD33PLL 10 mA

VD33USB 20 mA

VD33 100 mA
BT Module

3.3 VA 10 mA
OPTICAL

3.3 VA 20 mA
RCU, STB-LED
IC610
VCC33 100 mA AMP,
Alive VCC Switch
DCDC Front LED*3ea
Ctrl_VCC
LDO or Switch WL_3V3 100 mA WIRELESS
P_CTRL
WL_CTRL Module
WL_CTRL

3-21 3-22
CIRCUIT VOLTAGE CHART
1. CONNECTORS
Mearsured Voltage
Part Designator Description Pin Number Voltage Spec Remark
(Main)
2 12 V 11.87 V
CN501 Connector,FFC/FPC/PIC 3 5V 5.13 V DISPLAY JIG
4 3.3 V 3.32 V
9 VCC_3.3V 3.29 V
Main Board CN502 Connector, FFC FRONT Interface
8 3.3 VA 3.3 V
CN503 Connector,FFC/FPC/PIC 26 3.3 V 3.31 V WIRELESS Interface
CN504 Connector,Wafer, FFC 10 3.3 V 3.31 V BLUETOOTH Interface
CN601 Connector,BtoB 4, 5, 6 PVDD 24 V from SMPS
Front Board CN300 Connector, FFC 2 VCC_3.3V 3.29 V from MAIN

3-23 3-24
2. OTHERS
Designator Description Pin Number Voltage Spec. Measured Voltage
Main Board
C502 Capacitor,AL,Chip 2 16 V 3.37 V
C744 Capacitor,AL,Chip 2 25.7 V(PVDD) 25.64 V
C747 Capacitor,AL,Chip 2 25.7 V(PVDD) 25.63 V
CN503 Connector,FFC 26 3.3 V(Wireless) 3.37 V
7, 18, 25, 54, 61, 71, 81, 82 VD33 3.34 V
41 VD33PLL 3.357 V
19, 38, 42, 53, 80, 116, 98, 117, 118, 116,
VD33ADAC 3.356 V
127, 128
IC501 IC,Digital Signal Processors
126 VD33AAAC 3.248 V
83, 52, 20 VD13 1.246 V
121 VD13ADC 1.246 V
37 VD33USB 3.33 V
IC503 IC,Serial Flash Memory 8 3.3 VA 3.37 V
IC504 IC,Serial Flash Memory 8 3.3 VA 3.4 V
3 12 VA 11.96 V
IC605 IC,DC,DC Converter
2 5.1 VA 5.06 V
2 25.7 VA 25.55 VA
IC608 IC,DC,DC Converter
3 12 VA 12.11 VA
7 5.1 VA 5.18 V
IC609 IC,DC,DC Converter 6 3.3 VA 3.25 V
3 1.3 V 1.27 V
1 3.3 VA 3.38 V
IC610 IC,Analog Switch
6 3.3 V(Wireless) 3.38 V
1 5.1 VA 5.17 V
IC611 IC,Analog Switch
6 5 V(USB) 5.16 V
29, 30, 31, 36, 37, 38 25.7 V(PVDD) 25.64 V
2 VDD 12.27 V
IC703 IC, AMP
13 AVDD 8.02 V
1, 22 GVDD 12.08 V
JK502 Jack,Optical 3 3.3 VA 3.25 V
WIC500 IC,Serial Flash Memory 8 3.3 VA 3.39 V
Front Board
RC300 Receiver Module 3 3.3 VA 3.25 V

3-25 3-26
PRINTED CIRCUIT BOARD DIAGRAMS
1. SMPS P. C. BOARD DIAGRAM
(TOP VIEW) NOTE) Warning
Parts that are critical with respect to risk
of fire or electrical shock.

(BOTTOM VIEW)

3-27 3-28
2. MAIN P. C. BOARD DIAGRAM
(TOP VIEW)

(BOTTOM VIEW)

3-29 3-30
3. FRONT P. C. BOARD DIAGRAM
(TOP VIEW) (BOTTOM VIEW)

3-31 3-32
 SECTION 4
WIRELESS SUBWOOFER PART

CONTENTS

ONE POINT REPAIR GUIDE ............................................................................................................................ 4-2

1. POWER ON ERROR .............................................................................................................................. 4-2
2. WIRELESS CONNECTION .................................................................................................................... 4-4

WAVEFORMS OF MAJOR CHECK POINT...................................................................................................... 4-5

1. CRYSTAL ................................................................................................................................................ 4-5
2. FLASH MEMORY ................................................................................................................................... 4-5
3. VOLTAGE ............................................................................................................................................... 4-6
4. AMP VOLTAGE ...................................................................................................................................... 4-7
5. PWM ....................................................................................................................................................... 4-8
6. LED ......................................................................................................................................................... 4-9

WIRING DIAGRAM .......................................................................................................................................... 4-11

BLOCK DIAGRAM .......................................................................................................................................... 4-13

CIRCUIT VOLTAGE CHART ........................................................................................................................... 4-15

PRINTED CIRCUIT BOARD DIAGRAMS ....................................................................................................... 4-17

1. WOOFER SMPS & AMP P. C. BOARD ............................................................................................... 4-17

4-1
 ONE POINT REPAIR GUIDE
1. POWER ON ERROR
Fundamental power check points.

1-1. 12 V
1) Check 12 V at WL708.
2) If 12 V is not checked at the point, then find PVDD at pin7 of WIC704.
3) 1), 2) is NG  Replace WIC704.

If you can’t check PVDD voltage, then replace the PCB board.

WIC704

WL708

< Woofer SMPS & AMP board top view >

1-2. 3.3 VA
1) Check 3.3 VA at WL707 coil.
2) If 3.3 VA is not checked at the point, then find 12 VA at pin3 of WIC705.
3) 1), 2) is NG  Replace WIC705.

If you can’t check 12 VA voltage, following the step 1-1.

WL707

WIC705

< Woofer SMPS & AMP board top view >

4-2
 ONE POINT REPAIR GUIDE
POWER ON ERROR
Fundamental power check points.

1-3. 3.3 VA
1) Check 3.3 VA at pin1 of WIC703.
2) Check 3.3V_PWM at pin6 of WIC703.
3) 1), 2) is NG  Replace WIC703.

If you can’t check PVDD voltage, then replace the PCB board.

WIC703

< Woofer SMPS & AMP board bottom view >

4-3
 ONE POINT REPAIR GUIDE
2. WIRELESS CONNECTION
Wireless connection malfunction.

2-1. 3.3 VA
1) Check 3.3 VA at WFB604.

2-2. Connection
1) Wireless module connection closely.
2) Implement Wireless Factory Reset.
 MAIN SET : Soundbar vol MIN and push Mute key (sustain 3 ~ 5 seconds).
 Subwofer :  Push Pairing key on the back case of the wireless subwoofer.
    The LED of of the wireless subwoofer blink red and green, pull out power cord.
    The main set and the wireless subwoofer are factory reset mode, then power on.

WFB604
Wireless module
Connection check

< Woofer SMPS & AMP board top view >

4-4
 WAVEFORMS OF MAJOR CHECK POINT
1. CRYSTAL

FIG 1. WX601 (24.576 MHz)

2. FLASH MEMORY

VCC
2

CS#
3

CLK 3 5
4

DO
5

FIG 2. VCC, CS#, CLK, DO

2 4

4-5
3. VOLTAGE

6 7

FIG 3-1. Woofer PVDD FIG 3-2. Woofer 12 VA

8 6

FIG 3-3. Woofer 3.3 VA

FIG 3-4. Woofer 3.3V_PWM

4-6
4. AMP VOLTAGE

10 11

FIG 4-1. AMP PVDD FIG 4-2. AMP_12V

11 10

4-7
5. PWM

12 13

FIG 5-1. Woofer PWM SW+ Signal FIG 5-2. Woofer PWM SW- Signal

12

13

4-8
6. LED

14 15

FIG 6-1. Pairing Off Status  Red LED FIG 6-2. Pairing On Status  Green LED

14

15

4-9
4-10
WIRING DIAGRAM

2P, 3.96 mm
ST, Non Lock SMD

Wireless
26P, 0.5 mm
ST, Non Lock SMD

2P, 3.96 mm
ST, Non Lock , SMD

Power

Top Bottom

FFC
C Harness

4-11 4-12
BLOCK DIAGRAM

Wireless
TX

LED (RED, GREEN)

Wireless AMP_PDN

RX AMP_SD
PAIRING

Reset KEY
I2C I2S

FL
LPF

SW+/SW-
AMP FR
LPF
PWM IC

4-13 4-14
CIRCUIT VOLTAGE CHART

Location No. Description Pin Number Specification Real Value (#1, #2)
VDD _IO: VDD_IO:
3.37 V 3.37 V
#17, 43, 52 2.97 V ~ 3.63 V
IC,
VDD_CORE: VDD_CORE: 1.08 V
WIC601 Sound/Audio Pro- 1.27 V 1.27 V
#6, 25, 63 ~ 1.32 V
cessor
VDD_PLL:
VDD_PLL: #68 1.28 V 1.28 V
1.08 V ~ 1.32 V
PVDD:
PVDD:
#29, 30, 31, 20.61 V 20.64 V
12 V ~ 34 V
36, 37, 38
IC,
WIC701 GVDD:
Audio Amplifier GVDD: #1, 22 12.41 V 12.42 V
10.8 V ~ 13.2 V
VDD:
VDD: #2 12.47 V 12.47 V
10.8 ~13.2V
VIN:
VIN: #1 3.42 V 3.42 V
IC, 2.8 V ~ 5.5 V
WIC703
Analog Switch VOUT:
VOUT: #6 3.41 V 3.41 V
2.8 V ~ 5.5 V
VIN:
VIN: #7 34.61 V 34.64 V
IC, 4.5 V ~ 45 V
WIC704
DC,DC Converter VOUT:
SW: #1 12.53 V 12.53 V
0.8 V ~ 42 V
VIN:
VIN: #3 12.52 V 12.52 V
IC, 4.5 V ~ 17 V
WIC705
DC,DC Converter VOUT:
SW: #2 3.42 V 3.42 V
0.76 V ~ 7 V

4-15 4-16
PRINTED CIRCUIT BOARD DIAGRAMS
1. WOOFER SMPS & AMP P. C. BOARD
(TOP VIEW) (BOTTOM VIEW)

NOTE) Warning
Parts that are critical with respect to risk
of fire or electrical shock.

4-17 4-18