Service Manual

ViewSonic VX2235wm-1
Model No. VS11349
22” Color TFT LCD Display

(VX2235wm-1_SM Rev. 1a Aug. 2006)

ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
Copyright
Copyright © 2006 by ViewSonic Corporation. All rights reserved. No part of this publication
may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any
language or computer language, in any form or by any means, electronic, mechanical, magnetic,
optical, chemical, manual or otherwise, without the prior written permission of ViewSonic
Corporation.

Disclaimer
ViewSonic makes no representations or warranties, either expressed or implied, with respect to
the contents hereof and specifically disclaims any warranty of merchantability or fitness for any
particular purpose. Further, ViewSonic reserves the right to revise this publication and to make
changes from time to time in the contents hereof without obligation of ViewSonic to notify any
person of such revision or changes.

Trademarks
Optiquest is a registered trademark of ViewSonic Corporation.
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.

Revision History
Revision SM Editing Date ECR Number Description of Changes Editor

1a 8/14/2006 Initial Release J. Chang

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 TABLE OF CONTENTS

1. Precautions and Safety Notices 1

2. Specification 3
3. Front Panel Function Control Description 13
4. Circuit Description 19
5. Adjustment Procedure 20
6. Troubleshooting Flow Chart 54
7. Recommended Spare Parts List 62
8. Exploded Diagram and Exploded Parts List 64
9. Block Diagram 67
10. Schematic Diagrams 68
11. PCB Layout Diagrams 74

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1. Precautions and Safety Notices
1. Appropriate Operation
(1) Turn off the product before cleaning.
(2) Use only a dry soft cloth when cleaning the LCD panel surface.
(3) Use a soft cloth soaked with mild detergent to clean the display housing.
(4) Use only a high quality, safety approved AC/DC power cord.
(5) Disconnect the power plug from the AC outlet if the product will not be used for a long period of time.
(6) If smoke, abnormal noise, or strange odor is present, immediately switch the LCD display off.
(7) Do not touch the LCD panel surface with sharp or hard objects.
(8) Do not place heavy objects on the LCD display, video cable, or power cord.
(9) Do not use abrasive cleaners, waxes or solvents for your cleaning.
(10) Do not operate the product under the following conditions:
- Extremely hot, cold or humid environment.
- Areas containing excessive dust and dirt.
- Near any appliance generating a strong magnetic field.
- In direct sunlight.
2. Caution
No modification of any circuit should be attempted. Service work should only be performed after you are thoroughly
familiar with all of the following safety checks and servicing guidelines.
3. Safety Check
Care should be taken while servicing this LCD display. Because of the high voltage used in the inverter circuit, the voltage is
exposed in such areas as the associated transformer circuits.
4. LCD Module Handling Precautions
4.1 Handling Precautions
(1) Since front polarizer is easily damaged, pay attention not to scratch it.
(2) Be sure to turn off power supply when connecting or disconnecting input connector.
(3) Wipe off water drops immediately. Long contact with water may cause discoloration or spots.
(4) When the panel surface is soiled, wipe it with absorbent cotton or other soft cloth.
(5) Since the panel is made of glass, it may break or crack if dropped or bumped on hard surface.
(6) Since CMOS LSI is used in this module, take care of static electricity and ensure human earth when handling.
(7) Do not open or modify the Module Assembly.
(8) Do not press the reflector sheet at the back of the module in any direction.
(9) In the event that a Module must be put back into the packing container slot after it was taken out of the container, do
not press the center of the CCFL Reflector edge. Instead, press at the far ends of the CFL Reflector edge softly.
Otherwise the TFT Module may be damaged.
(10) At the insertion or removal of the Signal Interface Connector, be sure not to rotate or tilt the Interface Connector of
the TFT Module.
(11) After installation of the TFT Module into an enclosure (LCD monitor housing, for example), do not twist or bend the
TFT Module even momentarily. When designing the enclosure, it should be taken into consideration that no
bending/twisting forces may be applied to the TFT Module from outside. Otherwise the TFT Module may be
damaged.
(12) The cold cathode fluorescent lamp in the LCD contains a small amount of mercury. Please follow local ordinances or
regulations for disposal.
(13) The LCD module contains a small amount of materials having no flammability grade. The LCD module should be
supplied with power that complies with the requirements of Limited Power Source (IEC60950 or UL1950), or an
exemption should be applied for.
(14) The LCD module is designed so that the CCFL in it is supplied by a Limited Current Circuit (IEC60950 or
UL1950). Do not connect the CCFL to a Hazardous Voltage Circuit

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 Correct methods : Incorrect Methods :
Only touch the metal-frame of the panel or the front Surface of the panel is pressed by fingers & this may
cover of the monitor. cause “ MURA “
Do not touch the surface of the polarizer .

Take out the monitor with cushion Take out the monitor by grasping the LCD panel.
That may cause “ MURA“.

Place the monitor on a clean & soft foam pad . Place the monitor on foreign objects .
That could scratch the surface of panel

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2. Specification
2.1 INSTRUCTION
FEATURES VX2235wm
Size 22 " wide
TFTLCD PANEL Luminance (Typ) 280 cd/㎡
1st Contrast Ratio (Typ) 700:1
Colors 16.2 M (6 bits + 2 bits FRC)
CMO Response Time 5 ms(on/off)
A220Z1 Viewing Angle (H/V) 170 ° / 160 °
Recommend resolution 1680x1050@60Hz
Analog Yes (75ohms, 0.7/1.0 Vp-p)
Input Signal
Digital Yes
Separate Sync Yes
Sync Compatibility Composite Sync Yes
Sync on Green Yes
PC Yes
Compatibility Power Mac Yes
TV Box (NextVision 6) Yes
Power Voltage AC 100-240V, 50/60Hz Yes
On Mode(Typ) < 48 W
Power Consumption
Off Mode (Max) ≦1 W
Audio 3W / THD 10% (Max) Yes
Tilt ( 20 ° - -5 °) Yes
Swivel No
Ergonomics
Pivot No
Height Adjust No

OSD Control [ 1 ] [ 2 ] [ ][▼] [▲] Yes

Physical (W x H x D) 524 x 482 x 244 mm

Dimension
Package (W x H x D) 575 x 522 x 150 mm
Physical (Net Weight) 6 Kg / 13.2 lbs
Weight
Package (Gross Weight) 7.5 Kg / 16.5 lbs
Temperature (℉/℃) 41℉-95℉/+5℃-+35℃
Operating Condition
Humidity (%) 20 % - 80 %
Temperature (℉/℃) -4℉-131℉/-20℃-55℃
Storage Condition
Humidity (%) 20 % - 85 %
Global: CB, MPR II,WEEE,ROHS
VSA:UL, cUL, FCC-B, TUV-S, NOM, Energy Star
Regulation VSE:TUV/ERGO(covers ISO13406-2&MPR II),CE, GOST-R+Hygienic ,SASO , ENERGY
VSI: BSMI, CCC, PSB, C-TICK, MIC, Green Mark
VSCN:CCC

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2.2 GENERAL SPECTION

Test Resolution & Frequency 1680x1050 @ 60Hz

Test Image Size Full Size
Factory Default:
Contrast and Brightness Controls
Contrast = 70%, Brightness = 100%

2.3 VIDEO INTERFACE

Analog Input Connector DB-15 (Analog), refer the appendix A

Digital Input Connector DVI-D (Digital), refer the appendix B
Default Input Connector Defaults to the first detected input
Video Cable Strain Relief Equal to twice the weight of the monitor for five minutes
Video Cable Connector DB-15 Pin out Compliant DDC 1/2B
1. Video RGB (Analog)
Video Signals Separate, Composite, and Sync on Green
2. TMDS (Digital)
Video Impedance 75 Ohms (Analog), 100 Ohms (Digital)
Maximum PC Video Signal 950 mV with no damage to monitor
Maximum Mac Video Signal 1250 mV with no damage to monitor
Sync Signals TTL
DDC 1/2B Compliant with Revision 1.3
Sync Compatibility Separate Sync, Composite Sync, SOG
Shall be compatible with all PC type computers, Macintosh computers,
Video Compatibility
and after market video cards
640 x 350*, 640 x 480, 720 x 400* (640 x 400*), 800 x 600, 832 x 624,
1024 x 768, 1152 x 864, 1152 x 870, 1280 x 720, 1280 x 960, 1280 x
1024 , 1400 x 1050 , 1440 x 900 , 1600 x 1200, 1680 x 1050
Resolution Compatibility

* The image vertical size might not be full screen.

But the image vertical position should be at the center.
Exclusions Not compatible with interlaced video

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2.4 POWER SUPPLY

Internal Power Supply Part Number: 27-D009542

Input Voltage Range AC100~240 (Worldwide)
Input Frequency Range 50 to 60 Hertz
Short Circuit Protection OUTPUT CAN BE SHORTED WITHOUT DAMAGE
Over Current Protection 3.3~4.5A typical at 5 VDC ( PROTECT WHEN SHORT CIRCUIT )
Leakage Current 3.5MA (MAX) AT 264VAC / 50HZ
Efficiency 80 % TYPICAL AT 115VAC FULL LOAD
Fuse INTERNAL AND NOT USER REPLACEABLE
Power Dissipation < 48 WATTS (TYP)
Max Input AC Current 1.6A (max)
Inrush Current (Cold Start) 80 A Max./ 240VAC / 50Hz (Cold Start at 25℃,Full Load)
SHALL START AND FUNCTION PROPERLY WHEN UNDER
Power Supply Cold Start FULL LOAD, WITH ALL COMBINATIONS OF INPUT VOLTAGE,
INPUT FREQUENCY, AND OPERATING TEMPERATURE
SHALL BE ABLE TO WITHSTAND AN ANSI/IEEE C62.41-1980
Power Supply Transient Immunity 6000V 200 AMPERE RING WAVE TRANSIENT TEST WITH NO
DAMAGE
Shall be able to withstand 1.5 times nominal line voltage for one cycle
Power Supply Line Surge Immunity
with no damage
Shall be able to function properly, without reset or visible screen
Power Supply Missing Cycle Immunity artifacts, when ½ cycle of AC power is randomly missing at nominal
input
The power supply shall not produce audible noise that would be
detectable by the user. Audible shall define to be in compliance with
Power Supply Acoustics
ISO 7779 (DIN EN27779:1991) Noise measurements of machines
acoustics. Power Switch noise shall not be considered
Separate 3-prong NEMA 5-15P type plug. Length = 1.8m. Connects
US Type Power Cable to display.
Color = Black
Schuko CEE7-7 type plug.
European Type Power Cable Length = 1.8m, Connects to display.
Color = Black
Separate 3-prong type plug.
CCC Type Power Cable Length = 1.8m. Connects to display.
Color = Black
Separate 2-prong NEMA 1-15P type plug. Length = 1.8m. Connects
PSE Type Power Cable to display.
Color = Black
Power Saving Operation(Method) VESA DPMS Signaling
On Mode < 48 W (Typ) / 50 W (Max)
Saving Mode < 2 W@230VAC 50HZ
Power Consumption
Off Mode < 1 W @230VAC 50Hz
(DC Power Off; Meet to Energy Star Ver4.0 Tier2)
Recovery Time On Mode = N/A, Active Off < 3 sec

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2.5 ELECTRICAL REQUIREMENT
Horizontal / Vertical Frequency
Horizontal Frequency 24 – 82 kHz

Vertical Refresh Rate 50 – 85* Hz

Maximum Pixel Clock 150 MHz

Sync Polarity Independent of sync polarity.

Timing Table

Analog

Digital - TMDS
Composite
Separated
Item

Timing Remark

SOG

For Analog sync, the image vertical size image

will be not full screen (Still at the center), And the
1 640 x 350 @ 70 Hz, 31.5 KHz 　 　 　 　
OSD will be 640x350/640x400/720x400
(primary= 720x400).
For Analog sync, the image vertical size image
will be not full screen (Still at the center), And the
2 640 x 350 @ 85 Hz, 37.9 KHz 　 　 　 　
OSD will be 640x350/640x400/720x400
(primary= 720x400).
For Analog sync, switch 640x400@60Hz and
3 640 x 400 @ 60 Hz, 31.5 KHz 　 　 　 　 640x480@60Hz by [1]+[2] short cut key (primary
= 640x480@60Hz)
For Analog sync, the image vertical size image
will be not full screen (Still at the center), And the
4 640 x 400 @ 70 Hz, 31.5 KHz 　 　 　 　
OSD will be 640x350/640x400/720x400
(primary= 720x400).
For Analog sync, the image vertical size image
will be not full screen (Still at the center), And the
5 640 x 400 @ 85 Hz, 37.9 KHz 　 　 　 　
OSD will be 640x350/640x400/720x400
(primary= 720x400).
6 640 x 480 @ 50 Hz, 24.7 KHz 　 　 　
For Analog sync, switch 640x400@60Hz and
7 640 x 480 @ 60 Hz, 31.5 KHz 　 　 　 　 640x480@60Hz by [1]+[2] short cut key (primary
= 640x480@60Hz)
8 640 x 480 @ 67 Hz, 35 KHz 　 　 　 　
9 640 x 480 @ 72 Hz, 37.9 KHz 　 　 　 　

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10 640 x 480 @ 75 Hz, 37.5 KHz 　 　 　 　
11 640 x 480 @ 85 Hz, 43.3 KHz 　 　 　 　
For Analog sync, the image vertical size image
will be not full screen (Still at the center), And the
12 720 x 400 @ 70 Hz, 31.5 KHz 　 　 　 　
OSD will be 640x350/640x400/720x400
(primary= 720x400).
For Analog sync, the image vertical size image
will be not full screen (Still at the center), And the
13 720 x 400 @ 85 Hz, 37.9 KHz 　 　 　 　
OSD will be 640x350/640x400/720x400 (primary
= 720x400).
For Analog sync, the image vertical size image
14 720 x 480 @ 60 Hz, 31.5 KHz 　 　 　 　 will be not full screen (Still at the center),and the
information OSD shows 640x480
For Analog sync, the image vertical size image
15 720 x 576 @ 50 Hz, 31.3 KHz 　 　 　 　 will be not full screen (Still at the center),and the
information OSD shows 800x600
16 800 x 600 @ 56 Hz, 35.1 KHz 　 　 　 　
17 800 x 600 @ 60 Hz, 37.9 KHz 　 　 　 　
18 800 x 600 @ 72 Hz, 48.1 KHz 　 　 　 　
19 800 x 600 @ 75 Hz, 46.9 KHz 　 　 　 　
20 800 x 600 @ 85 Hz, 53.7 KHz 　 　 　 　
21 832 x 624 @ 75 Hz, 49.7 KHz 　 　 　 　
For Analog sync, Switch 1024x768@50Hz and
22 1024 x 768 @ 50 Hz, 39.6 KHz 　 　 　 　 1280x768@50Hz by [1]+[2] short cut key
(primary = 1024x768@50Hz)
23 1024 x 768 @ 60 Hz, 48.4 KHz 　 　 　 　
24 1024 x 768 @ 70 Hz, 56.5 KHz 　 　 　 　
25 1024 x 768 @ 75 Hz, 60 KHz 　 　 　 　
26 1024 x 768 @ 75 Hz, 60.2 KHz 　 　 　 　
27 1024 x 768 @ 85 Hz, 68.7 KHz 　 　 　 　
28 1152 x 864 @ 75 Hz, 67.5 KHz 　 　 　 　
29 1152 x 870 @ 75 Hz, 68.7 KHz 　 　 　 　
For Analog sync, Switch 1024x768@50Hz and
30 1280 x 768 @ 50 Hz, 39.6 KHz 　 　 　 　 1280x768@50Hz by [1]+[2] short cut key
(primary = 1024x768@50Hz)
31 1280 x 768 @ 60 Hz, 47.4 KHz 　 　 　 　
32 1280 x 768 @ 60 Hz, 47.8 KHz 　 　 　 　
For Analog sync, Switch 1024x768@75Hz and
33 1280 x 768 @ 75 Hz, 60.3 KHz 　 　 　 　 1280x768@75Hz by [1]+[2] short cut key
(primary = 1024x768@75Hz)
34 1280 x 768 @ 85 Hz, 68.6 KHz 　 　 　 　 For Analog sync, Switch 1024x768@85Hz and

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 1280x768@85Hz by [1]+[2] short cut key
(primary = 1024x768@85Hz)
35 1280 x 960 @ 50 Hz, 49.4 KHz 　 　 　 　
36 1280 x 960 @ 60 Hz, 59.7 KHz 　 　 　 　
37 1280 x 960 @ 75 Hz, 75.2 KHz 　 　 　 　
38 1280 x 1024 @ 50 Hz, 52.7 KHz 　 　 　 　
39 1280 x 1024 @ 60 Hz, 64 KHz 　 　 　 　
40 1280 x 1024 @ 70 Hz, 74.6 KHz 　 　 　 　
41 1280 x 1024 @ 72 Hz, 76.8 KHz 　
42 1280 x 1024 @ 75 Hz, 80 KHz 　 　 　 　
43 1360 x 768 @ 60 Hz, 47.7 KHz 　 　 　 　
44 1400 x 1050 @ 50 Hz, 54.1 KHz 　 　 　 　
45 1400 x 1050 @ 60 Hz, 64.7 KHz 　 　 　
For analog sync,, Switch 1400x1050@60Hz and
46 1400 x 1050 @ 60 Hz, 65.3 KHz 　 　 　 1680x1050@60Hz by [1]+[2] short cut key
(primary = 1680x1050@60Hz)
47 1400 x 1050 @ 75 Hz, 82.3 KHz 　 　 　 　
48 1440 x 900 @ 60 Hz, 55.5 KHz 　 　 　 　
49 1440 x 900 @ 60 Hz, 59.9 KHz 　 　 　 　
50 1440 x 900 @ 75 Hz, 75 KHz 　 　 　 　
51 1600 x 1200 @ 60 Hz, 75 KHz 　 　 　 　
For analog sync,, Switch 1400x1050@60Hz and
52 1680 x 1050 @ 60 Hz, 65.3 KHz 　 　 　 　 1680x1050@60Hz by [1]+[2] short cut key
(primary = 1680x1050@60Hz)
*1. Tolerance ≧ ±2KHz. (if the range dose not cover other timing mode)
*2. Any timing not in the list, it should display as normal or show on “OUT OF RANGE” OSD message with blanking.
*3. The image quality of 85Hz mode might be worse than 75Hz.

Primary Presets
1680x1050 @ 60Hz

User Presets
Number of User Presets (recognized timings) Available: 10 presets total in FIFO configuration

Changing Modes
● Maximum Mode Change Blank Time for image stability : 3 seconds (Max), excluding “Auto Image Adjust” time
● Under DOS mode (640 x 350, 720 x 400 & 640 x 400), it should recall factory setting when execute “Auto Image
Adjust”
● The monitor needs to do “Auto Adjust” the first time when a new mode is detected
(See section “0-Touch™ Function Actions”)

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2.6 FRONT PANEL CONTROLS AND INDICATORS
Front Panel Hardware Controls

Power Switch (Front Head) Power Control, soft Power Switch.

Power LED (Front Head) Blue – ON
Orange – Active Off
Dark = Soft Power Switch OFF
Front Panel Controls (Head) [ 1 ] BUTTON 1
[ 2 ] Button 2
[ 1 ] [ 2 ] [ ] [▼] [▲]
[ ] Power
[▼] DOWN ARROW BUTTON
[▲] UP ARROW BUTTON

Note: Power Button, Button 1 and Button 2 must be one-shot logic

operation. (i.e. there should be no cycling)
Reaction Time OSD must fully appear within 0.5s after pushing Button 1

Short Cuts Function from the button(s)

[1] Main Menu
[2] Input toggle (Analog or Digital)
[▼] To immediately activate Brightness/Contrast menu.
[▼] +[▲] Recall both of Contrast and Brightness to default
[1] + [2] Toggle 720x400 and 640x400 mode when input 720x400 or 640x400 mode
[1] + [▼] + [▲] White Balance. (Not shown on user’s guide)
(Keep pushing 3 sec)
[1] + [▼] Power Lock
[1] + [▲] OSD Lock
[▲] Essential mode switch
Standard ->Text -> Cinema -> Game -> Portrait -> Scenery -> Vivid
[2] + [▲] Skin tone switch
Nature -> Reddish -> yellowish
[▼] +[▲] + [ ] Factory Mode
Remark : All the short cuts function are only available while OSD off

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Main Menu Controls

Auto Image Adjust*1

Contrast/Brightness*2*4
Input Select
Analog, Digital
Audio Adjust
Volume*4, Mute*4
Color Adjust
SRGB, 9300K,7500K, 6500K(default), 5400,User Color [R, G, B]
Information [H Frequency, V Frequency, Resolution, Pixel Clock, Serial Number, Model Number,
[“www.ViewSonic.com” ]
Manual Image Adjust
Horizontal Size*1, H/V. Position*1, Fine Tune*1, Sharpness*3 , Opticolor [Standard, Text , Cinema, Game, Portrait,
Scenery, Vivid ], Opticolor Skin Tone[Nature, reddish ,yellowish]
Setup Menu
Language [English, French, German, Italian, Spanish, Finnish, Japanese, Simplified Chinese, Traditional Chinese],
Resolution Notice, OSD Position, OSD Timeout, OSD Background
Memory Recall

*1 These functions are not available in Digital Mode

*2 These functions are not available under SRGB Mode, Opticolor On, and Opticolor Skin Tone On
*3 These functions are not available under Native Resolution Mode
*4 These functions setting can be recalled to default value by pressing [▼]+[▲]

[Remark] Please refer to the detail in the Appendix C

Function descriptions

OSD Lock short cuts function for the buttons

The OSD lock will be activated by pressing the front panel control buttons "(1), & (▲)" for 10 seconds. If the user then tries to
access the OSD by pressing any of the buttons "1", "▼", "▲", "2" a message will appear on the screen for 3 seconds showing
"OSD Locked". The OSD lock will be deactivated by pressing the front panel control buttons "(1), & (▲)" again for 10
seconds.
Note1: When the OSD is locked will lock all functions, including “Volume” and “Mute”
Note 2: Status bar indicating OSD Lock or Unlock is in progress and when complete it will indicate “OSD Locked”
Note 3: OSD Lock should not lock Power Button and Power Lock function
Power Lock short cuts function for the buttons
The power button lock will be activated by pressing the front panel control buttons "(1), & (▼)" for 10 seconds. Locking the
power button means that the user won't be able to turn off the LCD while the power button is locked. If the user presses the
power button while it is locked, a message will appear on the screen for 3 seconds showing "Power Button Locked". It also
means that with the power button locked, the LCD would automatically turn back "On" when power is restored after a power

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failure. If the power button is not in the locked mode, then power should return to it's previous state when power is restored
after a power failure. The power button lock will be deactivated by pressing the front panel control buttons "(1), & (▼)" again
for 10 seconds.

Note 1: Status bar indicating Power Button lock or unlock is in progress and when complete it will indicate “Power Button
Locked”
Note 2: Power should only be lockable in the “On State”
Memory Recall Actions
Memory Recall action on the analog and digital mode as below
1. Set the factory defaults as shown in Section 4-8
2. Clean all the mode setting buffer
3. Execute Auto Image Adjust

Note: Memory Recall should have no effect for Language, Power Lock, User Color Settings or Input Priority
Resolution Notice Actions
1. Resolution Notice OSD should show on screen after changing to non-native mode for 30 sec
2. The OSD should disappear after 10 sec or by pushing button [1] or [2]
Resolution Notice function should be disabled when push button [2] under Resolution Notice OSD
0-Touch™ Function Actions
1. Execute Auto Image Adjust when new mode detected, and save the settings to buffer for further use
2. It should be reset by Memory Recall function
(Should not reset by power off, power unplug and others)
OSD Auto Save
The OSD shall save new settings when it is turned off by the user or when it times out. There shall not be a separate save

Input Priority
This function is defined the auto detect priority when the display has several inputs. Please refer to the detail flow chart as the
appendix D

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2.7 AUDIO INTERFACE (SPEAKER SPECIFICATION)
Line input signal 1.0 Vrms @1kHz
Line input impedance 10 kOhm
Maximum Amp power output (Watt) 2 W (RL=4Ω)

Amp -THD < 10 % THD @1kHz

Speaker Power rating(Ω/Watt) 4Ω/2.5 W (TYP.) ; 4Ω/ 3 W (MAX)

Signal to Noise Ratio 72 dB

Frequency response Fo – 20kHz
SPL. 85 ± 3 dB (at 0.5m)
FO 300 Hz

Line input connection 3.5 mm stereo jacks

There should be no audible vibration resonance at volume=100% &

Vibration
treble / bass in def. Value

There should be no affect on the screen image stability under any

Screen image
conditions
Connector PC99 requirement Audio in Lime Green pantone # 577C

Cable type / length 3.5mm stereo cable / 1.8m length

SPEAKERS STAY ON WHEN THE REST OF THE MONITOR IS IN
POWER SAVING
Audio DPMS NOTE: THERE IS NO GUARANTEE <1 W AT POWER
CONSUMPTION IN ACTIVE OFF MODE, WHEN THE AUDIO
CABLE IS CONNECTED

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3. Front Panel Function Control Description

Adjusting the Screen Image

Use the buttons on the front control panel to display and adjust the OSD controls which display
on the screen. The OSD controls are explained at the top of the next page and are defined in
“Main Menu Controls” on page 10.

Main Menu
with OSD controls

Front Control Panel

shown below in detail

Displays the control screen for Standby Power On/Off

the highlighted control. Power light
Also toggles between two Blue = ON
controls on some screens. Orange = Power Saving
Also a shortcut to Auto Image
Adjust.

Scrolls through menu

options and adjusts the
displayed control.
Displays the Main Also a shortcut to display
Menu or exits the the Contrast adjustment
control screen and control screen (T) /
saves adjustments. OptiColor (S)

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 Do the following to adjust the display setting:
1. To display the Main Menu, press button [1].

NOTE: All OSD menus and adjustment screens disappear automatically after about 15
seconds. This is adjustable through the OSD timeout setting in the setup menu.
2. To select a control to adjust, pressSorTto scroll up or down in the Main Menu.
3. After the desired control is selected, press button [2]. A control screen like the one shown
below appears.

The command line at the bottom of the

control screen tells what to do next from
this screen. You can toggle between control
screens, adjust the selected option, or exit
the screen.

4. To adjust the setting, press the up S or down T buttons.

5. To save the adjustments and exit the menu, press button [1] twice.

The following tips may help you optimize your display:

• Adjust the computer's graphics card so that it outputs a 1680 x 1050 @ 60Hz video signal to
the LCD display. (Look for instructions on “changing the refresh rate” in the graphics card's
user guide.)
• If necessary, make small adjustments using H. POSITION and V. POSITION until the
screen image is completely visible. (The black border around the edge of the screen should
barely touch the illuminated “active area” of the LCD display.)

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 Main Menu Controls
Adjust the menu items shown below by using the up S and down T buttons.

Control Explanation

Auto Image Adjust sizes and centers the screen image automatically.

Contrast adjusts the difference between the image background (black level)
and the foreground (white level).

Brightness adjusts background black level of the screen image.

Input Select toggles between inputs if you have more than one computer
connected to the VX2235wm.

Audio Adjust
Volume increases the volume, decreases the volume, and mutes the audio.
Mute temporarily silences audio output.

Color Adjust provides several color adjustment modes, including preset color
temperatures and a User Color mode which allows independent adjustment of
red (R), green (G), and blue (B). The factory setting for this product is 6500K
(6500 Kelvin).

sRGB-This is quickly becoming the industry standard for color management,

with support being included in many of the latest applications. Enabling this
setting allows the LCD display to more accurately display colors the way they
were originally intended. Enabling the sRGB setting will cause the Contrast and
Brightness adjustments to be disabled.

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 Control Explanation

9300K-Adds blue to the screen image for cooler white (used in most office
settings with fluorescent lighting).

7500K - Adds blue to the screen image for cooler white (used in most office
settings with fluorescent lighting).

6500K-Adds red to the screen image for warmer white and richer red.

5400K-Adds green to the screen image for a darker color.

User Color Individual adjustments for red (R), green (G), and blue (B).
1. To select color (R, G or B) press button [2].
2. To adjust selected color, pressSandT.
Important: If you select RECALL from the Main Menu when the product is
set to a Preset Timing Mode, colors return to the 6500K factory preset.

Information displays the timing mode (video signal input) coming from the
graphics card in the computer, the LCD model number, the serial number, and
the ViewSonic® website URL. See your graphics card’s user guide for
instructions on changing the resolution and refresh rate (vertical frequency).
NOTE: VESA 1680 x 1050 @ 60Hz (recommended) means that the resolution
is 1680 x 1050 and the refresh rate is 60 Hertz.

Manual Image Adjust

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 Control Explanation

Horizontal Size adjusts the width of the screen image.

H./V. Position (Horizontal/Vertical Position) moves the screen image left or

right and up or down.

Fine Tune sharpens the focus by aligning text and/or graphics with pixel
boundaries.
NOTE: Try Auto Image Adjust first.

Sharpness adjusts the clarity and focus of the screen image.

OptiColor Mode provides an optimum display environment depending on the

contents displayed. It contains 7 user-selectable presets. These 7 presets are
easily accessible from the short cut keys.

Standard is for general windows environment and monitor default setting.

Text optimized for text editing and viewing in a word processing environment.

Cinema optimized for movie and video environment.

Game optimized for PC/TV game environment.

Portrait optimized for displaying indoor portraits and enhancing pictures.

Scenery optimized for displaying outdoor scenery images.

Vivid optimized for color luster and sharpness.

These 7 presets are carefully chosen by Viewsonic, but may not suit all users'
tastes. In that case, the user can either return to the Standard setting and
manually adjust the brightness and contrast as desired.

OptiColor Skin Tone includes 3 presets (Natural / Red Tone / Yellow Tone)
which user can select according to user's preference.

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 Control Explanation

Setup Menu displays the menu shown below:

Language Select allows the user to choose the language used in the menus and
control screens.

Resolution Notice allows the user to enable or disable this notice.

If you enable the Resolution Notice shown above and your computer is set at a
resolution other than 1680 x 1050, the following screen appears.

OSD Position allows the user to move the OSD menus and control screens.

OSD Timeout sets the length of time the OSD screen is displayed. For example,
with a “30 second” setting, if a control is not pushed within 30 seconds, the
display screen disappears.

OSD Background allows the user to turn the OSD background On or Off.

Memory Recall returns the adjustments back to factory settings if the display is
operating in a factory Preset Timing Mode listed in the Specifications of this
manual.

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4. Circuit Description
1.RTD 2553V
Realtek RTD2553V series products are all-in-one LCD monitor controllers supporting UXGA / WSXGA+ / WXGA+ / SXGA
(optional), and integrate Realtek high performance ADC, TMDS Rx(optional),scaling engine, OSD engine, LVDS Tx, RSDS
Tx and so on. Moreover, all products are pin compatible in QFP128-pin package to save cost and make the design easier.

2. RTD2120
This chip is the micro-processor of LCD monitor. It uses the design ware DW8051 of Synopsys as the 8051 core of this chip
and is compatible with other industry 8051 series. Also, 96Kbyte FLASH with 8 bit bus is embedded in this chip which is
licensed from TSMC 0.18um e-FLASH process. Here we use the package of PLCC44/LQFP48 if we would like to have a
discrete MCU controller or we make a multi-chip package with our LCD monitor controller to form one chip package to save
the cost of package and PCB material.

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5. Adjustment Procedure
A. Function Test and Alignment Procedure
1. All Modes Reset
You should do “All Model Reset” (Refer to Chap 3. Hot Keys for Function Controls) first. This action will allow
you to erase all end-user’s settings and restore the factory defaults.

2. Auto Image Adjust

The Auto Adjust is aimed to offer a best screen quality by built-in ASIC. For optimum screen quality, the user
has to adjust each function manually.
A.Turn the computer and LCD monitor on.
B. Press the ‘Auto’ button on monitor keypad to Auto Adjust.
C. The LCD monitor will start the Auto Adjust process automatically and run for 10 consecutive seconds, during
which time you will notice the image change.
3. Firmware
Test Patten: Burn in Model (Refer to Chap3. Hot Keys for Function Control)
-Make sure the F/W is the latest version.

4. DCC
Test Patten: EDID program
-Make sure it can pass test program.

5. Window Shut Down

Test Signal: 1280*1024@60Hz
Test Pattern:

Checkered Pattern Every One Pixel (50%Green & 50%Blue)

Inspection Item: Flicker, Mura

6. Window BG
Test Signal: 1280*1024@60Hz
Test Pattern:

Window standard pattern

Inspection Item: Line Defect, Function Defect & Mura
7. 25 Gray
Test Signal: 1280*1024@60Hz
Test Pattern:

Full Screen 25% White (Gray)

Inspection Item: Particle, Line Defect & Mura

8. 50 Gray
Test Signal: 1280*1024@60Hz
Test Pattern:

Full Screen 50% White (Gray)

Inspection Item: Bright Dot, Particle, Line Defect & Mura

9. White Box
Test Signal: 1280*1024@60Hz
Test Pattern:

Window standard pattern

Inspection Item: Particle, Line Defect, Power, Image Remain & Mura

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 10. Black Box
Test Signal: 1280*1024@60Hz
Test Pattern:

Window standard pattern

Inspection Item: Bright Dot, Line Defect & Power

11. RED
Test Signal: 1280*1024@60Hz
Test Pattern:

Full Screen Red

Inspection Item: Bright Dot, Partial & Line Defect

12. Green
Test Signal: 1280*1024@60Hz
Test Pattern:

Full Screen Green

Inspection Item: Bright Dot, Partial & Line Defect

13. Blue
Test Signal: 1280*1024@60Hz
Test Pattern:

Full Screen Green

Inspection Item: Bright Dot, Partial & Line Defect

14. Gray_Scale_0-100_V64
Test Signal: 1280*1024@60Hz
Test Pattern:

Vertical 64 (256) Gray Scale (Right → Left，From 0 to 100% White)

Inspection Item: Line Defect & Function Defect

15. Function Test Display pattern

Item Pattern Description Remark

1 Gray_Scale_0-100_V Vertical 64 (256) Gray Scale (right→left，From 0 to 100% White) Figure 1
2 Gray_Scale_0-100_H Horizontal 64 (256) Gray Scale (up→down，From 0 to 100% White) Figure 2
3 Black Full Screen Black Figure 3
4 Red Full Screen 50% Red Figure 4
5 Green Full Screen 50% Green Figure 5
6 Blue Full Screen 50% Blue Figure6
7 White Full Screen White Figure7
8 Black_Tile Black Tile Under White Background Figure 8

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 Figure 1 Figure 2

Figure 3 Figure 4

Figure 5 Figure 6

Figure 7 Figure 8

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B BIOS update procedure

1. To setup ISP environment

Hardware:
PC or Notebook , Parallel(Printer) cable , ISP tool( Fig 1)

Software:
ISP driver .
If the O.S. was Win2000 or Win XP please have to install

PORT95NT.exe

Fig1

In order to ensure can execute ISP program, please set BIOS in PC or Notebook as Fig 2

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 Fig 2

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2. Install ISP

2.1 User could download ISP driver and PORT95NT install file from Myson Century website( //www.myson.com.tw )
2.2 After extracting the zip file, the total files list as Fig 2.2, and double click the file of setup.exe to install.

Fig 2.2

2.3 Press “Next＂ button to continue., see Fig 2.3

Fig 2.3

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2.4 Keep default setting or press “Change＂ button for selecting the path that you want , and then press“Next＂button to
continue, see Fig 2.4.

Fig 2 4

2.5 Press “Install＂ button to continue, see Fig 2.5

Fig 2.5

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2.6 The Installer Information shows package warning, press “Ignore＂ button to continue, see Fig 2.6.

Fig 2.6

2.7 Installation has finished, press “Finish＂ button, see Fig 2.7.

Fig 2.7

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3. ISP security code

3.1 After installation, we could find the shortcut in the setting path or the program bar (default setting), see Fig 3.1.

Fig 3.1

2.2 Security file is a key to use ISP function, press “確定＂ button, see Fig 3.2.

Fig 3.2

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3.3 The warning is used to remind user of that different CPU rate may cause ISP function fail(it is limited by IIC protocol),
press “確定＂ button, see Fig 3.3.

Fig 3.3

2.4 Press“Create Security File＂ button to key in security code. Adjusting bar to decrease speed of IIC bus, see Fig 3.4.

Fig 3.4

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3.5 At least 2 Command No of security code, see Fig 3.5, and different security code between hardware ISP and software ISP.
The security code of software ISP is set by user while coding, but the security code of hardware ISP is set by Myson Century.

Fig 3.5

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3.6 Fig 3.6 shows the setting for security code of hardware ISP, it needs 4 Command No, and key in command sequentially
for 94, 94, AC, CA, 53.

Fig 3.6

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3.7 Fig 3.7 shows the setting for security code of software ISP, it needs 2 Command No, and key in command sequentially
for 7C, 4C, 77. The Command No and command must be set by user while coding. About the detail of setting, please refer to
Section 6 Boot code of ISP.

Fig 3.7

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4. Use ISP to program MCU
4.1 Select MTV type first, load the binary or Intel hex file that you want to program into the MCU, and select “Auto＂ item,
then press “RUN＂ button, see Fig 4.1.
4.2 If user changes the MTV type, it must load file again, or the buffer of load file will be cleared.
4.3 CRC (cyclic redundancy check): the host can check CRC register＇s result instead of reading every byte in flash. The
message of Check MCU CRC OK means that the Host verify ok for the progress of program.

Fig 4.1

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5 Use ISP to read MCU content
5.1 Only software ISP could read the MCU content, it is according to program the boot code while coding. The limitation is
used for the security of customer＇s code. Select “Read Target＂ item, and press“RUN＂ button, the MCU content
will show as Fig 5.1.

Fig 5.1

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5.2 If user uses hardware ISP to read MCU content, it shows as Fig 5.2.

Fig 5.2

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6 Re-entry the ISP Mode
When you could not select or click ｀Reset MCU＇ button and enter ISP mode again, you refer the message as below:

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Note:
(1)Disable the ｀Enter ISP Mode＇ option to avoid the error message display.
(2)If you using the MTV312M64 or before MCU serials, the MCU will always in ｀ISP Mode＇even programming fail or
erase MCU that instead of select or press ｀Reset MCU＇.

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7. Boot code of ISP

7.1 Hardware ISP

(1) Without boot code

(2) Fixed security code: 94, 94, AC, CA, 53
(3) Attention to the pin of HSCL (1) and HSDA (1) should keep in enable
(4) MTV412M, MTV512M, CS8954 support hardware ISP

7.2 Software ISP

(1) With boot code

(2) User define the security code
(3) Attention to the pin of HSCL (1) and HSDA (1) should keep in enable
(4) Only software ISP could read the MCU content
(5) MTV212M, MTV312M, MTV230M, MTV412M, MTV512M, CS8954 support software ISP

7.3 Boot code of software ISP

(1) Initialize MCU

(a) Define the I/O pin to HSCL (1) and HSDA (1)
(b) Define the slave B address
(c) Enable 8051 INT1 (ISR 2)

(2) Coding for INT1 while get into ISP mode

(a) Clear watchdog to prevent reset during ISP period

(b) Disable all interrupt to prevent CPU wake-up
(c) Write ISP slave address
(d) Write 93h to ISP enable address to enable ISP
(e) Enter 8051 idle mode

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7.4 The followings show the relationship between the code and the security code.

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8. ISP Adaptor Schematic

9. Adaptor Linking

ISP Adaptor

Connect with
The Monitor Set PC/HOST
Printer Cable
25Pins to 25Pins

Connect with
VGA Cable

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C. Packing For Shipping And Disassembly Procedure
Packing For Shipping
1. Packing Procedure

1.1 Paste protection film to protect the monitor. (Figure 1)

1.2 Put the monitor in the PE bag and seal the bag with tape. (Figure 2)

Figure 1 Figure 2

1.3 Put the cushion into the carton then place the monitor on the cushion. (Figure 3)
1.4 Put the cushion then place the seat assy and all the accessories into the carton. As last,
close the carton and seal it with tape. (Figure 4)

Figure 3 Figure 4

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Monitor Assembly and Disassembly
1 Separate Stand Assy
1.1 Remove Stand Cover

Step 1 :
Remove the Seat Assy

Step 2 :
Remove the Stand Cover.

Step 3 :
Loose and remove 4 screws

Step4 :
Remove the Stand Assy

Step 5 :
Completed.

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2 Separate Rear Cover (Rear Case Assy)
Separate Bezel hooks to take Bezel and Rear Cover apart.

Step 1 :
Loose and remove 2 screws.

Step 2 :
Separate Bezel hooks to take
Bezel and Rear Cover apart.

Step 3 :
Remove Rear Cover.

Step 4 :
Completed.

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3 Remove Power Board and AD Board
3.1 Remove Metal Cover

Step 1 :
Remove FFC from OSD Board.

Step 2 :
Loose and remove 4 screws.

Step 3 :
Lift up LCD module and remove bezel.

Step 4 :
Remove 2 pieces of Backlight wires.

Step 5 :
Remove 2 pieces of Backlight wires.

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 Step 6 :
Loose and remove 2 screws.

Step 7 :
Loose and remove 2 screws.

Step 8 :
Loose and remove 4 screws.

Step 9 :
Remove the PCBA Cover

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3.2 Remove Power Board and AD Board

Step 1 :
Loose and remove 4 screws.

Step 2 :
Remove Lips Board

Step 3 :
Remove 2 pieces of FFCs.

Step 4 :
Remove the FFC.

Step 5 :
Loose and remove 4 screws.

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 Step 6 :
Remove AD PCBA.

Step7 :
Completed.

4 Change New AD Board and Power Board

Step 1 :
Place new AD Board.
And fasten 4 fixed screws.

Step 2 :
Fasten 4 fixed screws.

Step 3 :
Insert FFC.

Step 4 :
Insert 2 pieces of FFCs .

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 Step 5 :
Insert new Lips Board.

Step 6 :
Fasten 4 fixed screws.

Step 7 :Completed.

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5. Remove OSD Board

Step 1 :
Separate both Audio Cable.

Step 2 :
Take OSD Board apart.

Step 3:
Completed.

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6.Change New OSD Board
Step 1 :
Place New OSD Board.

Step 2 :
Insert Audio cable to connectors of
New OSD Board.

Step 3:
Completed.

7. Add Cover to AD PCB Heatsink

Step 1 :
Join the PCB Cover.

Step 2 :
Fasten 4 fixed screws.

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 Step 3 :
Fasten 2 fixed screws

Step 4 :
Fasten 2 fixed screws.

Step 5 :
Insert 2 pieces of Backlight wires.

Step 6 :
Insert 2 pieces of Backlight. wires.

Step 7 :
Join LCD module and remove bezel.

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 Step 8 :
Fasten 4 fixed screws.

Step 9 :
Insert FFC.

Step 10 :
Completed.

8. Rear Assy & Stand Assembly

Step 1 :
Place Rear Cover.

Step 2 :
Fasten 2 fixed screws.

Step 3 :
Place the Stand Assy.

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 Step 4 :
Fasten 4 fixed screws.

Step 5 :
Join the Stand Cover.

Step 6 :
Join the Seat Assy

Step 7 :
Completed.

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6. Troubleshooting Flow Chart

Defect Mode Failure Analysis Repair Testing

Light On Test ※ “ Panel Change” Should be Performed to Level 3 Repair

Flash Dots
Abnormal
Bright Dot
Display
Dark Dot

Backlight

Light Leakage

Mura Panel Change

Check Panel
Image Sticking

Brightness spot

Particle

Dot Defect

Image Remain

Group Bright
Dots

Others Cosmetics

Defect

NG
Next Step TEST

A
Completed

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 Defect Mode Failure Analysis Repair Testing
※ “ Panel Change” Should be Performed to Level 3 Repair

Display Noise

Check PCBA AD/B Change

Power on
Display Power/B Change
Abnormal
Inverter/B Change

Flicker CNT/B Change

Beat Display
Flicker
Check Panel Panel Change

Beat Display
Shut Down

AD/B Change
Display Wave
Check PCBA Power/B Change

CNT/B Change

Check Panel Panel Change

No Backlight Check Adapter Adapter Change

NG
Next Step TEST

B Completed

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 Failure Analysis Repair Testing
※ “ Panel Change” Should be Performed to Level 3 Repair

B
Display White
Check PCBA AD/B Change
Out
Power/B Change
Booting Delay Check PCBA
Inverter/B Change
Brightness
OSD/B Change
Even
Abnormal Power/B Change
Check PCBA

Inverter/B Change
Beat Display
No Backlight Check Panel Panel Change

Check Adapter Adapter Change

No signal
AD/B Change

R.G.B Check PCBA CNT/B Change

Display
Abnormal

Check Wire VGA cable

Gray Scale DVI cable

Display
Check Panel Panel Change
Abnormal

NG
Next Step TEST

C
Completed

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 Defect Mode Failure Analysis Repair Testing

※ “ Panel Change” Should be Performed to Level 3 Repair

Horizontal
Line Defect

Vertical
Weak Line AD/B Change
Check PCBA

Horizontal
Weak Line

Vertical
Check Panel Panel Change
Band Defect

Horizontal
Band Defect

Power Saving
Display Check PCBA AD/B Change
Abnormal

AD/B Change

Power/B Change
Peculiar Smell Check PCBA

Inverter/B Change

NG
Next Step TEST

Complete

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 Defect Mode Failure Analysis Repair Testing

※ “ Panel Change” Should be Performed to Level 3 Repair

AD/B Change

Power/B Change

Power ON/OFF No Power Check PCBA CNT/B Change

Abnormal Inverter/B
Check PCBA
Turn Off
Abnormal OSD/B Change

Check Wire
OSD Cable

Check Wire
AC Power Change
DC Power CNT
Cable Change
Check Adapter Adapter Change

AD/B Change

LED Display Power/B Change

LED Off Check PCBA
Abnormal
Inverter/B
LED Dark
OSD/B Change

LED Abnormal
OSD Cable
Check Wire
LED Loss DC Power CNT
Cable Change
LED Flicker
Adapter Change

NG
Next Step TEST

Completed

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 Defect Mode Failure Analysis Repair Testing

※ “ Panel Change” Should be Performed to Level 3 Repair

Abnormal BIOS OSD Key AD/B Change

&OSD Unavailable
CNT/B Change
OSD Can’t
Power/B Change
Input Check PCB
Inverter/B
OSD Can’t
Read OSD/B Change

OSD No
D-sub cable
Display
Check Wire OSD cable

OSD Jiggle VGA cable

DVI cable
OSD Display
Abnormal Check BIOS BIOS Update

Abnormal Voice Loss AD/B Change

Loudspeaker
CNT/B Change
Abnormal
Power/B Change
Loud Check PCBA
Inverter/B Change
L/R
Abnormal OSD/B Change
Check Wire

No Voice OSD Cable Change

Loudspeaker
L/R Same Check Loudspeaker
Change
Volume

Loudspeaker NG
Next Step TEST
Noise

Completed

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 Defect Mode Failure Analysis Repair Testing

※ “ Panel Change” Should be Performed to Level 3 Repair

Other Abnormal Display Shut Check PCBA AD/B Change

Display Down
Power/B Change

CNT/B Change

Check Panel Panel Change

Display Flicker Check PCBA AD/B Change

((tapping ) CNT/B Change

Check Panel Panel Change

DVI Signal Check PCB AD/B Change

Display
Abnormal EDID Update
Check EDID Code

Check PCBA TV /B Change

TV Function
Check Wire
Display AV Cable Change
Abnormal Check Controller Remote controller
Change

NG
Next Step TEST

Complete

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 Trouble Shooting Analysis

Check the information in this section to see if the problems can be solved before requesting repair.
Note：The consumers are only allowed to solve the problems described as below. Any
unauthorized product modification, or failure to follow instructions supplied with the product
will end the warranty immediately.

z No image
‹ Make sure power button is ON.
‹ Check whether the LCD monitor and computer power cords are plugged and whether there is a
supply of power.

z No Signal Input
‹ Check the signal connection between the computer and LCD monitor.

z “Out of Range”
‹ Check the computer image output resolution and frequency and compare the value with the
preset values (Please refer to [Appendix-Display Mode]).

z Fuzzy Image
‹ Adjust Phase.

z Image too bright

‹ Adjust brightness and contrast by OSD.

z Image too dark

‹ Adjust brightness and contrast by OSD.

z Irregular image
‹ Check the signal connection between the computer and LCD monitor.
‹ Perform Auto Adjust.

z Distorted image
‹ Reset the LCD monitor
‹ Take off extra accessories (such as signal extension cord).
z Image is not centered
‹ Use OSD Image Menu to adjust H_Position and V_Position.
‹ Check image size setting.
‹ Perform Auto Adjust.

z Size is not appropriate

‹ Use OSD Image Menu to adjust H_Position and V_Position.
‹ Check image size setting.
‹ Perform Auto Adjust.

z Uneven color
‹ Use OSD Color Menu to adjust color setting.

z Color too dark

‹ Use OSD Color Menu to adjust color setting.

z Dark area distorted

‹ Use OSD Color Menu to adjust color setting.

z White color is not white

‹ Use OSD Color Menu to adjust color setting.

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7. Recommended Spare Parts List
RECOMMENDED SPARE PARTS LIST (VX2235wm-1)
ViewSonic Model Number: VS11349
Serial No. Prefix: QA5 Rev: 1a
Item Description ECR/ECN ViewSonic P/N Ref. P/N Location Universal number# Q'ty
1 Accessories: Power Cord A-00005071 32-D002330 1
2 PC Board Assembly: Power Supply Board (Lips With Audio, V0.7) B-00008026 27-D009542 1
3 Main Board Rev.04 B-00008027 35-D010627 1
4 PCBA Rev.02,ODM B-00008028 35-D010238 1
5 Cabinets: Cover Hinge (Right) C-00008039 40-D010946 1
6 Cover Hinge (Left) C-00008040 40-D010960 1
7 Front Panel (Bezel) C-00008041 40-D010959 1
8 Back Cover C-00008042 40-D010948 1
9 Base Assembly (Stand Assy) C-00008043 40-D010942 1
10 Cover (Seat Assy) C-00008044 40-D010947 1
11 Cables: DVI Cable, S/L, 1.8M, W/2F CB-00002083 32F0000004 1
12 Audio Cable (Accessory Black, 28AWG) CB-00005678 32F2818011 1
13 Accessory Cable,D-Sub, 30AWG CB-00005851 32-D002132 1
14 Flat Cable (FFC 36 Pins) CB-00008014 32-D008479 2
15 Flat Cable (FFC 15 Pins) CB-00008015 32-D011077 1
16 Documentation: Safety Label 149 mmx29 mm DC-00008038 77-D010937 1
17 Carton Label 76.2 mmx76.2 mm DC-00008039 77-D010936 1
18 CD-Rom (Menu) DC-00008040 76-D011105 1
19 Hardware: SCREW,3,P=0.5 mm,L=4 mm HW-00000553 42A9930008 13
20 SCREW,3,P=0.5 mm,L=4 mm HW-00000553 42A9930008 2
21 Screw,M3*P0.5*6,Steel HW-00000555 42A9930014 6
22 Screw, M4, P=0.7 mm, L=8 mm HW-00004042 42-D000649 1
23 SCREW,4,P=0 mm,L=11.8 mm HW-00006041 42A9940007 4
24 SCREW M3,P=0.5 mm,L=2.5 mm HW-00008002 42-D009237 3
25 SCREW M3,P=1.27 mm,L=10 mm HW-00008003 42A9930015 1
26 Miscellaneous: Tape,A170E1-H0P,900 mmx50 mmx0 mm M-00000560 7345511002 0.05
27 Packing Material: PE Bag,600 mmx650 mmx0.13 mm P-00008033 78-D009624 1
28 Craft Foam (Top) P-00008034 78-D011076 1
29 Craft Foam (Bottom) P-00008035 78-D011075 1
30 Carft Box P-00008036 78-D011103 1
31 Plastics: Panel Cover (Panel Protector Film) PL-00008008 73-D009538 1

Remark 1: Above listed items are examples, supplier can expand the rows to add more necessary items
Remark 2: All revised RSPLs with newly added items or any change made should be highlighted and correlated with the ECN/ECR approved by
ViewSonic Corporation. This is to eliminate repeated cross checks of each item between this version and prior versions.

ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1

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 BOM LIST (VX2235wm-1)
ViewSonic Model Number: VS11349
Rev: 1a
Serial No. Prefix: QA5
Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty
ACF, COG, AC-8405Z-23 1.5mmX100M, 100000 mmx1.5 mm, Hitachi Chemical, COG-ACF, Green
73-C000047 0.0028
1 N/A I
Driver IC, COG, Scan, M170E5-L09, HX8653-A000PD400, 240/263/256Channel, Himax, (HX8633
36-D006411 4
2 N/A shrank version), Green II
3 N/A L4M003XXXX 22"wide_TN, Photo Spacer , Corning 0.7mm Glass , Resin/BM(Panel Base) 1
4 N/A L4M003XXBI 22"wide_TN, Photo Spacer , Corning 0.7mm Glass , Resin/BM(Sheet Base) 0.0833
Polarizer, TFT, Degree 135, 478.16 mmx300.2 mmx0.215 mm, XT300CMM220Z1H0B, M220Z1,
74-D007599 1
5 N/A LG Chem, LG HCR EWV
Polarizer, CF, Degree 135, 480.76 mmx303.1 mmx0.215 mm, XT320CMM220Z1H0T, M220Z1, LG
74-D007598 1
6 N/A Chem, LG HCR EWV
Driver IC, COF, Data, M220Z1-L01, HX8019-A07BCBC5, COF, 6 bit, 642Channel, Himax, Green II
36-D007038 8
7 N/A
8 N/A 73-D008216 ACF, COF, AC-4255U-16, 200000 mmx1.2 mm, Hitachi Chemical, Green II 0.0025
9 N/A 73-D002676 ACF, PCB, AC-9825R-35, 100000 mmx1.5 mm, Hitachi Chemical, PCB-ACF, Green I 0.005
10 N/A 35-D010045 PCBA for , A220Z1-Z01-H, A220Z1-Z01-H-X, 1101-03, Rev.04, USI/ITC, ODM, Green II 1
11 N/A 7349951002 Silicone, TORAY/-9187L, 330g 0.5
12 HW-00008003 42A9930015 SCREW, M3, P=1.27 mm, L=10 mm, Pan Head, Phillips Cross Recess, Green I 1
13 B-00008028 35-D010238 PCBA for , A220Z1-Z01-H, A220Z1-Z01-H-K2, 1101-02, Rev.02, USI/ITC, ODM, Green II 1
14 C-00008039 40-D010946 Cover Hinge, A220Z1-H05, ABS PA-757N, ORIGINAL, Fuking, RIGHT, Green II 1
15 C-00008040 40-D010960 Cover Hinge, A220Z1-H05, ABS PA-757N, ORIGINAL, Fuking, LEFT, Green II 1
16 C-00008041 40-D010959 Bezel Assy, A220Z1-H05, Black(J01-J91A11B5), Fuking, SPK, Green II 1
17 C-00008042 40-D010948 Rear Assy, A220Z1-H05, Silver(TY4818A)/Black(M1077), Fuking, audio_in+DVI-D, Green II 1
18 CB-00008015 32-D011077 FFC, FFC1DDX-A186S1A, 15 Pins, Tennsure_FFC, A220Z1-H05, Green II 1
SCREW, 3, P=0.5 mm, L=4 mm, Pan Head, Phillips Cross Recess, Hama Naka Motogawa/Shin
42A9930008 2
19 HW-00000553 Yee/Hama Naka Shoukin/Shiho/Shye Ching, Green I
SCREW, 3, P=0.5 mm, L=6 mm, Pan Head, Phillips Cross Recess, Hama Naka Shoukin/Shye
42A9930014 6
20 HW-00000555 Ching/Hama Naka Motogawa/Shin Yee, NA, Green I
21 C-00008043 40-D010942 Stand Assy, A220Z1-H05, Silver(TY4818A), Hontech, Green II 1
22 PL-00008008 73-D009538 Panel Protector Film, A220Z1-H03, XG-536 T=0.1mm, Just Enter, BLANK 1
SN Label for , A220Z1-H05, 50 mmx25 mm, Chang Huang/Kunshan Hwakuan, VSC_VX2235wm,
77-D010938 1
23 N/A Green II
24 DC-00008038 77-D010937 Safety Label for , A220Z1-H05, 149 mmx29 mm, Chang Huang, VSC_VX2235wm, Green II 1
25 HW-00002076 7841595111 Corner Protector, paper, 50 mmx50 mmx1850 mm, Green II 0.083
Separator, (AA), A190E2-H04, 1200 mmx1050 mmx11 mm, Shanghai Zhung Hao/Hua Sun Paper,
7841996911 0.021
26 N/A ACER, Non Green
27 DC-00000586 7741999141 Module Label, A190E2-H03, 75 mm, 40 mm, Non Green 0.042
28 M-00000560 7345511002 Tape, A170E1-H0P, 900 mmx50 mmx0 mm, Symbio, OPP 0.005
29 N/A 73-D001327 Tape, 82296 mmx48 mmx0.045 mm, cmo, OPP, Green I 0.014
Pallet, A190E3-H02_acer, Wooden, (KD-HT), 1209 mmx1066 mmx135 mm, Hua Sun
78-D003113 0.021
30 N/A Paper/Shanghai Hang Wei/Ming Li, Green I
31 P-00008033 78-D009624 Bag, 600 mmx650 mmx0.13 mm, PE Foam, 650, Huang Jyii, Green II 1
Carton Label for , A220Z1-H05, 76.2 mmx76.2 mm, Chang Huang/Kunshan Hwakuan,
77-D010936 1
32 DC-00008039 VSC_VX2235wm, Green II
33 C-00008044 40-D010947 Seat Assy, A220Z1-H05, Black(ABS-757-J01)/Siliver(TY4818A), Hontech, Green II 1
34 N/A 79-D011065 Shipping Package Information for , A220Z1-H05, VSC 1
Cushion, A220Z1-H05, EPS, White, 565 mmx520 mmx75 mm, Li Ta, EPS-FORM(Top), Green II
78-D011076 1
35 P-00008034
Cushion, A220Z1-H05, EPS, White, 565 mmx520 mmx65 mm, Li Ta, EPS-FORM(Bottom), Green II
78-D011075 1
36 P-00008035
37 P-00008036 78-D011103 Carton, A220Z1-H05, 522 mmx154 mmx575 mm, Chen Yi Paper, VSC_VX2235wm, Green II 1
MENU for A220Z1-H05, Complex, 4C, Yi Ching/Car Tong Kunshan, VSC_VX2235wm CD-ROM,
76-D011105 1
38 DC-00008040 Green II
SCREW, 3, P=0.5 mm, L=4 mm, Pan Head, Phillips Cross Recess, Hama Naka Motogawa/Shin
42A9930008 13
39 HW-00000553 Yee/Hama Naka Shoukin/Shiho/Shye Ching, Green I
SCREW, 4, P=0 mm, L=11.8 mm, Hexagon Stand Off, Socket, Hama Naka Motogawa/Shiho/Shin
42A9940007 4
40 HW-00006041 Yee/Shye Ching, Green I
SCREW, M4, P=0.7 mm, L=8 mm, Round Head, Phillips Cross Recess, plate color Zn,
42-D000649 1
41 HW-00004042 Screw_with_Washer, Shye Ching/Hama Naka Motogawa, head D8, Green I
42 N/A 41-D007402 Metal Frame Front, M220Z1-L01, SECC 0.6t, Fomgder/CLT_Metal, Green II 1
43 N/A 44-D008027 Backlight Unit, A220Z1, Forhouse/ROE, Green II 1
44 N/A 41-D008024 Cover AD Assy, A190A2, SECC, Jiin Ming, Left_Side 4 connector_VESA100*100, Green II 1
45 CB-00008014 32-D008479 FFC, CFC2128/862P060068D, 36 Pins, Tennsure/Hung Fu, AL foil, Green I 2
46 HW-00008002 42-D009237 SCREW, M3, P=0.5 mm, L=2.5 mm, Pan Head, Phillips Cross Recess, Shye Ching, Green II 3
Lips With Audio, DAC-19M009 AF, 00 A, 5 V/3 A, 13.8 V0.7 A, I TYPE, 7 mA, 1710 V, Delta
27-D009542 1
47 B-00008026 Dongguan_LIPS, Green II
PCBA for , A220Z1-Z01-H, A170E2-E03-H-S6, 1101-02, Rev.04, ITC/USI, ODM, RTD2120S-LF,
35-D010627 1
48 B-00008027 Green II
Software (EDID_DVI), A220Z1, VSC591ED01, ViewSonic, Checksum(6A), VX2235wm, Digital
10-D011770 1
49 N/A Port, Green II
Software (EDID_D-SUB), A220Z1, VSC591EA01, ViewSonic, Checksum(15), VX2235wm, Analog
10-D011769 1
50 N/A Port, Green II
Software (BIOS), A220Z1, 22Z1LR3002, ViewSonic, Checksum(Bank1:0xEC, Bank2:0xD5),
10-D012223 1
51 N/A RSDS, RTD2120, Dual+Audio/Analog+Audio, Green II
52 CB-00002083 32F0000004 Accessory Cable, DVI, Black, Jceprocable, DVI-D(M) TO DVI-D(M), S/L, W/2F, Green I 1
53 CB-00005678 32F2818011 Accessory Cable, Audio, Black, Jhen Vei, A170E1-H01, 28AWG, Green I 1
Accessory Cable, D-Sub, JV-4777, Black, Pins-Pins, Jhen Vei, 30AWG, Reduce Shield Rate, Green I
32-D002132 1
54 CB-00005851
Power Cord, LP-53 & VCTF 0.75mm^2 3C 6 BLACK & LS-13J, BLACK, BSMI, 1800 mm, Linetek,
32-D002330 1
55 A-00005071 Green I

ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1

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8. Exploded Diagram and Exploded Parts List

ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1

64
 EXPLODED PARTS LIST (VX2235wm-1)
ViewSViewSonic Model Number: VS11349
Rev: Rev: 1a
SerialSerial No. Prefix: QA5
Item ViewSonic P/N Ref. P/N Description Q'ty
1 C-00008040 40-D010960 COVER_HINGE_LEFT_22W15 1
2 C-00008039 40-D010946 COVER_HINGE_RIGHT_22W15 1
3 N/A 40-D010955 REAR_ASSY_22W15 1
4 N/A PM0ZFH0R00 22" Wide,Monitor,D-Sub+DVI+Audio 1
5 N/A 40-D010955 BEZEL_ASSY_22W15 1
6 N/A 35-D0110238 PCBA_A220Z1-Z01-H-K2 1
7 CB-00008015 32-D011077 FFC_15pin 1
8 C-00008043 40-D010942 STAND_ASSY_22W15 1
9 C-00008044 40-D010947 SEAT_ASSY_22W15 1
10 N/A 44-D009236 Backlight Unit,A220Z for MFM 1
11 N/A N/A Maylar 1
12 N/A 27-D008552 Lips Without Audio,DAC-19M009 BF 1
13 N/A 35-D009418 PCBA for A220Z1-Z01-P 1
14 N/A 41-D008024 Cover AD Assy 1
15 N/A 32-D009479 FFC,36pin 2
16 HW-00008002 42-D009237 SCREW,M3,P=0.5mm,L=2.5mm,Pan Head 3
17 HW-00000553 42A9930008 SCREW,M3,P=0.5mm,L=4mm,Pan Head 7
18 HW-00004042 42-D000649 SCREW,M4,P=0.7mm,L=8mm,Round Head 1
19 HW-00000553 42A9930008 SCREW,M3,P=0.5mm,L=4mm,Pan Head 4
20 N/A 42A993008 SCREW,M3,P=0.5mm,L=5mm,Pan Head 2
21 HW-00000555 42A9930014 SCREW,M3,P=0.5mm,L=8mm,Pan Head 6
22 HW-00008003 42A9930015 SCREW,M3,P=1.27mm,L=10mm,Pan Head 1

ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1

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 PACKING PART LIST ( VX2235wm-1 )
ViewSonic Model Number: VS11349
Rev: 1a
Item ViewSonic P/N Ref. P/N Location Q'ty
1 N/A VX2235wm LCD Monitior 1
2 P-00008033 78-D009624 PE Foam Bag 1
3 P-00008036 78-D011103 Carton 1
4 P-00008035 78-D011075 EPS Foam (Bottom) 1
5 P-00008034 78-D011076 EPS Foam(Top) 1
6 C-00008044 40-D010947 Seat Assy 1
7 A-00005071 32-D002330 Power Cord 1
8 CB-00005851 32-D002132 Monitor Cable 1
9 CB-00005678 32F2818011 Audio Cable 1
10 CB-00002083 32F0000004 DVI Cable 1
11 DC-00008040 76-D011105 Menu (Quick Setup) 1
12 N/A Different region (refer to BOM) Customer Label 1
13 N/A Different region (refer to BOM) Warranty Registration card 1

ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1

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9. Block Diagram

OSD Key Pad / Audio Out Speaker

3.3V

DVI-D 5V
Digital Video Main Board
LCD Module
D-sub 12V
Analog Video
Signal
LDO

DC-5V DC-12V

AC Power LIPS Backlight

Audio In

ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1

67
 ViewSonic Corporation
MCU1
10. Schematic Diagrams

MUTE
DCDC_ON/OFF
V5A
AUDIO_FUNCTION

68
INV_ON/OFF

03_MCU
VGA_5V
CONNECT LED_ORG
MUTE

LED_GRN
INV_ON/OFF

PWR_SW
DCDC_ON/OFF

DDC2_SDA PANEL_ON/OFF
DDC2_SCL AUTO_ADJ
AUDIO_FUNCTION

BUS_POWER SOURCE_SELECT
KEY_UP
KEY_DOWN
LED_GRN
LED_ORG

MENU
RESET_RTD
MENU

RTD_SDIO3
RTD_SDIO2
RTD_SDIO1
RTD_SDIO0

DDC_CLK
RTD_SCLK
RTD_SCSB

DDC_DAT
YOUT

RESET_MCU
KEY_UP
PWR_SW

AUTO_ADJ
B5

KEY_DOWN

MUTE
PANEL_ON/OFF

DCDC_ON/OFF
SOURCE_SELECT

Confidential - Do Not Copy

AUDIO_FUNCTION

V5A
INV_ON/OFF

VGA_5V
RESET_RTD

CONNECT
LED_ORG

DDC2_SCL
DDC2_SDA
YOUT

LED_GRN

BUS_POEWR
DDC_CLK
DDC_DAT

PWR_SW
RTD_SCLK
RTD_SCSB
RTD_SDIO3
RTD_SDIO2
RTD_SDIO1
RTD_SDIO0

RESET_MCU

PANEL_ON/OFF
AUTO_ADJ
SOURCE_SELECT
KEY_UP
KEY_DOWN
MENU

VX2235wm-1
B4

YOUT

BCKP
DDC_CLK
DDC_DAT

BCKP BCKP
RTD_SCLK
RTD_SCSB
RTD_SDIO3
RTD_SDIO2
RTD_SDIO1
RTD_SDIO0

BCKN
B3
RESET_RTD

RESET_MCU

BCKN FCKP BCKN

FCKP FCKN FCKP
FCKN FCKN
BB2P
BB2P BB2P
DDC2_SCL

BB2N
DDC2_SDA

BB2N BB2N
BUS_POEWR

BB1P
BB1P BB1N BB1P
BB1N BB0P BB1N
BB0P BB0N BB0P
BB0N BB0N
BG2P
BG2P BG2N BG2P
BG2N BG1P BG2N
02_DVI

BG1P BG1N BG1P

BG1N BG0P BG1N
RX2P BG0P BG0N BG0P
RX2P RX2N RX2P BG0N BG0N
V33S RX2N RX1P RX2N BR2P
RX1P RX1N RX1P BR2P BR2N BR2P
RX1N RX0P RX1N BR2N BR1P BR2N
05_INTERFACE

RX0P RX0N RX0P BR1P BR1N BR1P

RX0N RXCP RX0N BR1N BR0P BR1N
RXCP RXCN RXCP BR0P BR0N BR0P
RXCN RXCN BR0N BR0N
FB2P
FB2P FB2N FB2P
FB2N FB1P FB2N
FB1P FB1N FB1P
FB1N FB0P FB1N
FB0P FB0N FB0P
FB0N FB0N
04_SCALER

FG2P
FG2P FG2N FG2P
FG2N FG1P FG2N
FG1P FG1N FG1P
FG1N FG0P FG1N
FG0P FG0N FG0P
B2

FG0N FG0N
FR2P
FR2P FR2N FR2P
DDC_CLK FR2N FR1P FR2N
DDC_DAT FR1P FR1N FR1P
CONNECT FR1N FR0P FR1N
VGA_5V FR0P FR0N FR0P
FR0N FR0N

STB
STB POL STB
POL STV POL
STV STV
01_VGA

CKV
VSYNC CKV OE CKV
VSYNC HSYNC VSYNC OE VCM_PWM OE
HSYNC HSYNC VCM_PWM INV_ADJ VCM_PWM
GNDB INV_ADJ VOL_ADJ INV_ADJ
GNDB GNDG GNDB VOL_ADJ GVOFF VOL_ADJ
GNDG GNDR GNDG GVOFF GVON GVOFF
GNDR SOG GNDR GVON FSTHI GVON
Title

V18_ESD SOG SOG FSTHI FSTHI

Date

BIN BSTHI
Model

BIN GIN BIN BSTHI BSTHI

GIN RIN GIN
RIN RIN
V33S
V18_ESD
V33S
V5A

V33S
V18_ESD

DIAGRAM
Rev:
ViewSonic Corporation
 FB1 R1 RIN
1
RAI+ C1 RIN TP1 TP
1 2
RIN 5
1 GNDR
TP2 TP

3
R2
11 1 RAI+ 1 C2 1 SOG
RAI- D1 TP3 TP
6
DDC_DAT 12 2 GAI+
7 GAI- 1 GIN
HSI BAI+ R3 TP4 TP
13 3
8 BAI- RAI- C3 GNDR

2
VSI 14 4 GNDR 5 1 GNDG
TP5 TP
9
DDC_CLK 15 5 C4
10 GND_POWER 1 BIN
TP6 TP
CON1
R5 1 GNDB
R4 GND_POWER CA1 SOG TP7 TP
SOG 5
GND_POWER
FB2 R6
GAI+ 1 2 C5 GIN
GIN 5 R7

4 CONNECT

3
R8
1 C6
V1 D2
GND_POWER

R9
GAI- C7 GNDG

2
GNDG 5
GND_POWER
C8

4 VGA_5V

GND_POWER
2

FB3 R10
Z1 BAI+ 1 2 C9 BIN
BIN 5
1

3
R11
1 C10
D3
GND_POWER

R12
BAI- C11 GNDB

2
GNDB 5

C12

GND_POWER R13
2 V18_ESD 5

Z2 C13
1

GND_POWER GND_POWER 1 HSYNC

TP8 TP

VSI R14 HSI R16 1 VSYNC

VSYNC 5 HSYNC 5
2

L1 TP9 TP

2
Z3
R15 C14 Z4 R17 C15 1 DDC_CLK
TP10 TP
1

1DDC_DAT

1
GND_POWER TP11 TP
GND_POWER GND_POWER GND_POWER
GND_POWER GND_POWER

DDC_CLK DDC_CLK 4,5 DDC_DAT DDC_DAT 4,5

V2 V3

GND_POWER GND_POWER

ViewSonic Corporation
Model

Title VGA
Date Rev:
ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1
69
 DATA0+ RX0P RX0P 5 DATA0- RX0N RX0N 5
D4 D5

3
1 1

C16 C17

2
CON2

25
R
26
G DATA1+ RX1P DATA1- RX1N
27 RX1P 5 RX1N 5
B
29
RGB GND D6 D7
28

3
HSYNC
8
VSYNC
15 1 1
SYNC GND DDC2_SCL
6
DDC SCL DDC2_SDA
7
DDC SDA
14
+5V C18 C19
16
HPD
DDC2_SCL 4

2
11
1/3shield
3 DDC2_SDA 4
2/4shield
19
0/5shield
22
clk shield
18 DATA0+ DATA2+ RX2P DATA2- RX2N
DAT0+ R18 RX2P 5 RX2N 5
17 DATA0-
DAT0- DATA1+ D8 D9
10

3
DAT1+ DATA1-
9
DAT1- DATA2+
2 1 1
DAT2+ DATA2-
1
DAT2-
13
DAT3+
12
DAT3- C20 C21
5
DAT4+
4

2
DAT4-
21
DAT5+
20
DAT5- CLK+
23
clk+ CLK-
24
clk- CLK+ RXCP CLK- RXCN
RXCP 5 RXCN 5
D10 D11
3

3
GND_POWER 1 1

C22 C23
4 BUS_POEWR
2

2
2

Z5
1

GND_POWER

GND_POWER

5,6 V33S
Z6

C24

GND_POWER ViewSonic Corporation

Model

Title DVI
Date Rev:
ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1
70
 DDC_CI_5V

DDC_CI_5V
D12
Q1
1 2 2 3
2 VGA_5V

8
7
6
5
RP1

1
BUS_POWER 1 2
3 BUS_POWER
D13

1
2
3
4
U1
3 2 D14 D15
3 DDC2_SDA 1B 1A DDC_CLK_OUT V5A
3 DDC2_SCL
6 5 6 V5A
1 2 1 2
2B 2A
2,5 DDC_CLK
8 9
3B 3A DDC_DAT_OUT
2,5 DDC_DAT
11 12
4B 4A DDC_CI_5V
DDC_CI_5V 1

1
1OE
4
2OE R21 D16
14 10
VCC 3OE
7 13
GND 4OE
C25

2
R19 R20

3
Q2 GND_POWER

GND_POWER 1 DDC_CI_SEL MCU_VCC

2
GND_POWER
3.1~3.6V
RTD_SDIO0 5

1
2
3
4
RTD_SDIO1 5
RP2

RTD_SDIO2 5

2 1

8
7
6
5
RESET_MCU 5 RTD_SDIO3 5
R22 C26 +
D17

1
2
3
4
6 PANEL_ON/OFF D18
3

Q3 RP3 1 2 IICSCL

1
2
3
4
IICSDA
1
RP4 R24
2

R23

8
7
6
5
6 DCDC_ON/OFF RTD_SCSB
GND_POWER R25
3

RTD_SCLK RTD_SCSB 5
Q4

8
7
6
5
RTD_SCLK 5

VCC
RST

P10
P11
P12
P13
P14
P15
P16
P17
GND_POWER R26
1 V5A
2

10

44

43
42
41
40
39
38
37
36

1
5 RP5 4 P50 2 D19

RST

VCC

P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
P1.0/ET2
GND_POWER P51 DA0/P5.0
6 3 3
7 2 P52 DA1/P5.1
6 INV_ON/OFF
4 1
P53 DA2/P5.2 NC
8 1 5 33

2
MCU_VCC 6 AUDIO_FUNCTION P54 DA3/P5.3 NC
2 CONNECT
6 34
P55 DA4/P5.4 NC
6 MUTE
7 35
R27 R29 P56 DA5/P5.5 NC
3 DDC2_SCL
8 12
R30 P57 P5.6/HSCL2 NC
3 DDC2_SDA
9 23
R31 P5.7/HSDA2 NC R32
32
DDC_CI_SEL P32 VSYNC P67 MENU_ISP
14 31 MENU 6
P33 P3.2/INT0 P6.7 P66
5 RESET_RTD
15 30 YOUT 5
P34 P3.3/INT1 P6.6/CLOK1 P65
16 29 KEY_DOWN 6
P35 P3.4/T0 P6.5 P64
17 28 KEY_UP 6
P76 P3.5/T1 P6.4 P63
6 LED_GRN
18 27 SOURCE_SELECT 6
R33 P77 P7.6/CLKO2 P6.3/AD3 P62
6 LED_ORG
19 26 AUTO_ADJ 6
P7.7 P6.2/AD2 P61
25

XTAL2

XTAL1
DDC_DAT_OUT P31 P6.1/AD1 P60 PWR_SW 6
R35 13 24

VSS
2,5 DDC_DAT DDC_CLK_OUT P30 HSDA1/P3.1/TXD P6.0/AD0
2,5 DDC_CLK
11
R34 HSCL1/P3.0/RxD
U2 R37

20

21

22
BUS_POWER
GND_POWER

VSS
R36

X2

X1
R38 R39

MCU_VCC Y1
2 GND_POWER

R40

R41

U3

VCC
RST

P10
P11
P12
P13
P14
P15
P16
P17
C28 C29
1 8
A0 VCC C27
SEEPROM

GND_POWER 2 7
A1 TEST

41

40
39
38
37
36
35
34
33
4
3 6 IICSCL
A2 SCL

RST

VCC

P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
P1.0/ET2
4 5 IICSDA P50 44
GND SDA GND_POWER P51 DA0/P5.0
45
P52 DA1/P5.1
46
P53 DA2/P5.2
47
P54 DA3/P5.3
48 32
P55 DA4/P5.4 NC
1 31
P56 DA5/P5.5 NC
2 30
GND_POWER P57 P5.6/HSCL2 NC
3 29
P5.7/HSDA2 NC
P30 5 28
P31 HSCL1/RXD/P3.0 VSYNC
8
HSDA1/TXD/P3.1 P67
27
P6.7 P66
26
P32 P6.6/CLKO1 P65
9 25
P33 P3.2/INT0 P6.5 P64
10 24
P34 P3.3/INT1 P6.4 P63
11 23
P35 P3.4/T0 P6.3/AD3 P62
12 22
P76 P3.5/T1 P6.2/AD2 P61
13 21
P77 P7.6/CLKO2 P6.1/AD1 P60
14 20

VSS
P7.7 P6.0/AD0

NC
NC

NC
NC

NC
NC
X2
X1
U4

15
16

17

6
7

18
19

42
43
ViewSonic Corporation
NC/MTV512/RoHS

X2
X1

VSS
Model

Title MCU
Date Rev:
ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1
71
 V33S

1
Q5

3 2 XI
4 YOUT

V33S
V18C

1 2 1 2 V33S 3,6
V33S
FBS1 C30 C31 C32 C33 FB4

1 2 R42 R43

FB5 C35
C34
GND_POWER
GND_POWER
2.5V

117

116

108

107
46

47

59
72
83
95

60
71
84
96
U5
R44

VCCK
VCCK

PVCC
PVCC
PVCC
PVCC
PVCC
GNDK
GNDK

PGND
PGND
PGND
PGND
PGND
RESET_RTD 4
GND_POWER R28
127
XI XO
128
R45 R46 XI
125 124 RESET_MCU 4
DPLL_VDD 33VRST_REF R74
126 123
DPLL_GND RESET_OUT
1
APLL_GND TCON9 / PWM0
122 TCON9 GVOFF 6
2
APLL_VDD DDCSCL2 / VCLK / TCON4
121 TCON4 GVON 6 GND_POWER
R47 3 120
6 VOL_ADJ PLL_TEST1 / TCON0 / TCON3 DDCSDA2 / V7 / TCON6
4 119 RTD_SCLK 4
PLL_TEST1 PLL_TEST2 / TCON1 / TCON12 SCLK / V6 / TCON3
118 RTD_SCSB 4
SCSB / V5 / TCON7
115 RTD_SDIO3 4
PLL_TEST2 SDIO[3] / V4 / TCON9
114 RTD_SDIO2 4
TMDS_TEST SDIO[2] / V3 / TCON5
5 113 RTD_SDIO1 4
TMDS_TST / PWM0 / TCON2 SDIO[1] / V2 / TCON8
6 112 RTD_SDIO0 4
REXT SDIO[0] / V1 / TCON10
7
TMDS_VDD V0 / TCON2
111 TCON2 BSTHI 6
RX2P 8 110
R49 RX2N RX2P TCON13 / COUT
9 109
RX2N 33VPNLOUT
10
R48 RX1P TMDS_GND A_R0N
11 106
RX1N RX1P AR1N A_R0P
(PWM0) 12 105
RX1N AR1P A_R1N A_R0N
13 104 BB2P 6
V33S RX0P TMDS_VDD AR2N A_R1P A_R0P
14 103 BB2N 6
RX0N RX0P AR2P A_R2N
15 102
RX0N AR3N A_R2P A_R1N
16 101 BB1P 6
TMDS_V33 RXCP TMDS_GND AR3P A_G0N A_R1P
1 2 17 100 BB1N 6
RXCN RXCP AG1N A_G0P
18 99
FB6 C37 RXCN AG1P A_G1N A_R2N
98 BB0P 6
C36 AG2N A_G1P A_R2P
97 BB0N 6
AG2P
A_G0N
BG2P 6
AVS 19 94 A_G2N A_G0P
AVS0 AG3N / TXO0- BG2N 6
AHS 20 93 A_G2P
AHS0 AG3P / TXO0+ A_CKN A_G1N
21 92 BG1P 6
GND_POWER ADC_VDD ACLKN / TXO1- A_CKP A_G1P
22 91 BG1N 6
B+ ADC_GND ACLKP / TXO1+ A_B0N
23 90
B- B0+ AB1N / TXO2- A_B0P A_G2N
24 89 BG0P 6
SOG B0- AB1P / TXO2+ A_B1N A_G2P
25 88 BG0N 6
G+ SOG0 AB2N / TXOC- A_B1P
26 87
G- G0+ AB2P / TXOC+ A_B2N A_CKN
27 86 BCKP 6
R+ G0- AB3N / TXO3- A_B2P A_CKP
28 85 BCKN 6
R- R0+ AB3P / TXO3+
29
R0- A_B0N
2 V18_ESD 1 2 BR2P 6
82 B_R0N A_B0P
BR1N / TXE0- BR2N 6
FB7 30 81 B_R0P
C39 B1- / V7 BR1P / TXE0+ B_R1N A_B1N
31 80 BR1P 6
C38 B1+ / V6 BR2N / TXE1- B_R1P A_B1P
32 79 BR1N 6
G1- / V5 BR2P / TXE1+ B_R2N
33 78
G1+ / V4 BR3N / TXE2- B_R2P A_B2N
34 77 BR0P 6
RX2P SOG1 / V3 BR3P / TXE2+ B_G0N A_B2P
35 76

PWM1 / TCON0 / COUT

PWM2 / TCON1/TCON7
3 RX2P R1- / V2 BG1N / TXEC- BR0N 6
RX2N 36 75 B_G0P
3 RX2N R1+ / V1 BG1P / TXEC+
RX1P 37 74 B_G1N

DDCSDA1 / TCON9
DDCSCL1 / TCON4
3 RX1P ADC_GND BG2N / TXE3-

SDIO[0] / TCON13

SDIO[2] / TCON11
RX1N 38 73 B_G1P

SDIO[1] / TCON7

SDIO[3] / TCON0
SCSB / TCON12
3 RX1N ADC_VDD BG2P / TXE3+

BCLKN/BGRN6
BCLKP/BGRN7
RX0P 39

SCLK / TCON3

BG3N/BGRN4
BG3P/BGRN5
3 RX0P AHS1 / V0

BB3N/BBLU6

BB2N/BBLU4

BB1N/BBLU2
BB3P/BBLU7

BB2P/BBLU5

BB1P/BBLU3
RX0N GND_POWER 40
3 RX0N AVS1 / VCLK
RXCP
3 RXCP
RXCN
3 RXCN

BJT_B
B_R0N
FB2P 6
B_R0P
FB2N 6
AVS B_R1N

50
51

52
53
54
55
56
57

48
49
58
61
62
63
64
65
66
67
68
69
70
2 VSYNC FB1P 6
AHS B_R1P
2 HSYNC FB1N 6
B_R2N
FB0P 6
B_R2P
FB0N 6
2 RIN R+ R50 B_G2N
2,4 DDC_CLK
2 GIN G+ B_G0N
FG2P 6
2 BIN B+ R51 B_G2P B_G0P
2,4 DDC_DAT FG2N 6
2 SOG SOG
2 GNDR R- TCON13 B_CKN B_G1N
6 FSTHI FG1P 6
2 GNDG G- B_G1P
FG1N 6
2 GNDB B- TCON7 B_CKP
6 POL
B_G2N
FG0P 6
TCON11 B_B0N B_G2P
6 STB FG0N 6
V33S TCON0 B_B0P B_CKN
6 STV FCKP 6
B_CKP
FCKN 6
TCON12 B_B1N
6 CKV
B_B0N
FR2P 6
TCON3 B_B1P B_B0P
6 OE FR2N 6
B_B2N B_B1N
FR1P 6
B_B1P
FR1N 6
R75 R52 R53 R54 PWM:230~300Hz(PWM1) B_B2P
6 INV_ADJ
B_B2N
FR0P 6
B_B2P
FR0N 6
R55 PWM:47KHz(PWM2)
6 VCM_PWM
2

Q6

ViewSonic Corporation
1 BJT_B

V18C
3

Q14
1
Model
3

Title SCALER
Date Rev:
ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1
72
 TP12

V5A1

TP
V5A V5A V33D
U6

TP

1
B1
V12V1 V12A 1 2 3 2 V33D (PANEL VCC)
5.0V

1 1
VI(5V) VO(3.3V)
4

TP

GND
V5A 4 VO(3.3V)
F1
C40 C44 C41

1
2
C42 C43 C45 C46

GND_POWER
B2
1 2

GND_POWER
CN3
AUDIOL+ R56
1 AUDIOL-
2 AUDIOR+
3 AUDIOR-
4
5
AUDIO_DISABLE_INPUT V5A
6
MUTE_INPUT
VOL_ADJ_INPUT
7
8
12V
9
10
11 AUDIO_FUNCTION 4
12 R57
13
14
INV_ON/OFF_INPUT
15 V33S
16
INV_ADJ_INPUT

2
1

3
R58 Q8

3
Q7 1
MUTE 4

2
3
Q9 R59
C47 TP13
1
INV_ON/OFF 4
V33S

TP
2
GND_POWER
U7

1
GND_POWER D20 B3
1 2 1 2 3 2 V33S
VI(5V) VO(3.3V) V33S 3,5
4

GND
VO(3.3V)
(SCALER VCC)

1
C48 C49 C50
V33S C51

V5A
B4
1 2
B5 R60
1 2 R61
B6 GND_POWER
1 2
R62
VR

GND_POWER V12A

3
[INV_GND]
3

Q10 Q11 + C54 C55

C52 1 C53
5 VOL_ADJ
1

2
INV_ADJ 5
2

GND_POWER GND_POWER
GND_POWER

1
1
2
3 2
V5A 3
PANEL_ON/OFF 4
4 PANEL_ON/OFF DCDC_ON/OFF 4
4 DCDC_ON/OFF 5
VCM_PWM 6 5
5 VCM_PWM GVOFF 6
R63 7
5 GVOFF GVON 7
R64 8
5 GVON 8
9
BSTHI 9
5 BSTHI 10
11 10
BR0N 11
12
5 BR0N BR0P 12
13
5 BR0P BR1N 13
LP1 CN4 14
MENU 5 BR1N BR1P 14
4 MENU 1 8 MENU
5 BR1P 15
KEY_DOWN 2 7 KEY_DOWN 15 1 MENU 1 KEY_DOWN 1 KEY_UP TP14 1 SOURCE_SELECT BR2N 16 15
4 KEY_DOWN 14 5 BR2N
KEY_UP 3 6 KEY_UP MENU1 TP KEY_DOWN1 TP KEY_UP1 TP TP BR2P 17
16
4 KEY_UP SOURCE_SELECT 13 5 BR2P 17
4 5 SOURCE_SELECT 18
4 SOURCE_SELECT AUTO_ADJ 12 AUTO_ADJ 18
1 8 AUTO_ADJ 1 1PWR_SW 1 LED_O 1 LED_G BCKN 19
4 AUTO_ADJ 11 5 BCKN
PWR_SW 2 7 LED_O AUTO_ADJ1 TP PWR_SW1 TP LED_O1 TP LED_G1 TP BCKP 20
19
LED_G 4 PWR_SW
3 6 LED_G 10 5 BCKP
21 20
LED_O 9 BG0N 21
4 5 PWR_SW 22
AUDIOR- 8 5 BG0N BG0P 22
L3 LP2 23
AUDIOR+ 7 5 BG0P 23
L2 1BSTHI 1 FSTHI 1 STV 1 CKV BG1N 24
6 5 BG1N
AUDIOL- L5 BSTHI1 TP FSTHI1 TP STV1 TP CKV1 TP BG1P 25
24
AUDIOL+ 5 5 BG1P BG2N 25
L4 26
4 OE POL STB VCM_PWM 5 BG2N BG2P 26
1 1 1 1 27
3 TP TP TP 5 BG2P
OE1 POL1 STB1 VCM_PWM1 TP 28 27
2 BB0N 28
29
5 BB0N
4
3
2
1

4
3
2
1

CP1 CP2 1 GVOFF1 GVOFF GVON BB0P 29

1 1 5 BB0P 30
TP GVON1 TP BB1N 31 30
D
C

D
C
B
A

B
A

5 BB1N BB1P 31
32
5 BB1P 32
CA

CA

BB2N 33
5 BB2N BB2P 33
34
5 BB2P 34
D
C

D
C
B
A

B
A

GND_POWER 35
36 35
5
6
7
8

5
6
7
8

36
CN1
GND_POWER

GND_POWER
V33D 1
V33D 1
2
3 2
STV R69 3
4
5 STV CKV 4
R68 5
5 CKV OE 5
R65 6
5 OE 6
7
FR0N 8 7
5 FR0N FR0P 8
9
5 FR0P FR1N 9
5 FR1N 10
FR1P 11 10
5 FR1P FR2N 11
12
5 FR2N FR2P 12
V33S V33S 13
5 FR2P 13
14
POL R67 14
5 POL 15
STB R66 16 15
5 STB 16
17
FCKN 18 17
5 FCKN FCKP 18
19
5 FCKP 19
20
FG0N 21 20
5 FG0N FG0P 21
22
2

5 FG0P FG1N 22
R70 1 R71 1 23
4 LED_ORG 4 LED_GRN 5 FG1N FG1P 23
Q12 Q13 24
5 FG1P FG2N 24
5 FG2N 25
FG2P 26 25
3

5 FG2P 26
27
FB0N 28 27
R73 5 FB0N FB0P 28
29
R72 LED_G 5 FB0P FB1N 29
5 FB1N 30
LED_O FB1P 30

ViewSonic Corporation
31
5 FB1P FB2N 31
32
5 FB2N FB2P 32
33
5 FB2P FSTHI FSTHI 33
34
5 FSTHI 34
35
36 35
36
CN2
Model
GND_POWER

Title I/F
Date Rev:
ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1
73
11. PCB Layout Diagrams

ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1

74
ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1
75
ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1
76
 * Reader’s Response*
Dear Readers:

Thank you in advance for your feedback on our Service Manual, which allows continuous improvement
of our products. We would appreciate your completion of the Assessment Matrix below, for return to
ViewSonic Corporation.
Assessment
A. What do you think about the content of this Service Manual?
Unit Excellent Good Fair Bad
1. Precautions and Safety Notices

2. Specification

3. Front Panel Function Control Description

4. Circuit Description

5. Adjustment Procedure

6. Troubleshooting Flow Chart

7. Recommended Spare Parts List

8. Exploded Diagram and Exploded Parts List

9. Block Diagrams

10. Schematic Diagrams

11.PCB Layout Diagrams

B. Are you satisfied with this Service Manual?

Item Excellent Good Fair Bad
1. Service Manual Content
2. Service Manual Layout
3. The form and listing

C. Do you have any other opinions or suggestions regarding this service manual?

Reader’s basic dada:

Name: Title:
Company:
Add:
Tel: Fax:
E-mail:
After completing this form, please return it to ViewSonic Quality Assurance in the USA at facsimile
1-909-839-7943. You may also e-mail any suggestions to the Director, Quality Systems & Processes
(marc.maupin@viewsonic.com)

ViewSonic Corporation Confidential - Do Not Copy VX2235wm-1

77