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Service Manual 
ViewSonic VX2739wm-1 
VX2739wm-CN 
Model No. VS12843 
27” Color TFT LCD Display 
(VX2739wm-1_VX2739wm-CN_SM Rev. 1a May. 2010) 
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583  
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Copyright 
CONFIDENTIAL – DO NOT COPY
Copyright © 2010 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. 
Product disposal at end of product life 
The lamp in this product contains mercury. Please dispose of in accordance with local, state 
or federal laws. 
Revision History 
Revision   SM Editing Date   ECR Number   Description of Changes   Editor 
1a   5/7/2010       Initial Release   Eden Chang 
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TABLE OF CONTENTS 
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1. Precautions and Safety Notices.......................................................................................4 
2. Specification .....................................................................................................................8 
3. Front Panel Function Control Description ...................................................................17 
4. Circuit Description...........................................................................................................20 
5. Adjusting Procedure .......................................................................................................22 
6. Trouble Shooting Flow Chart..........................................................................................68 
7. Block Diagrams ..............................................................................................................74 
8. Schematic Diagrams ......................................................................................................75 
9. PCB Layout Diagrams ...................................................................................................78 
10. Exploded Diagram And Spare Parts List .....................................................................79 
11. Recommended Spare Parts List .................................................................................80 
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1. Precautions and Safety Notices  
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Safety Instructions  
 The symbol is intended to alert the user to presence of un-insulated  
“Hazardous Voltage” within the product’s enclosure that may be of sufficient 
magnitude to constitute a risk of electric shock to persons. 
 This symbol is intended to alert the user that improper use of the product 
may result in product malfunction. The user should pay attention to avoid 
accidents or unnecessary problems. 
Wet Location 
Apparatus shall not be exposed to dripping or splashing and that no objects filled 
with liquids, such as vases, shall be placed on the apparatus. 
Outdoor Use 
WARNING: To reduce the risk of fire or electric shock, do not expose this 
apparatus to rain or moisture. 
Disconnect Device - The Mains Plug or An Appliance Coupler 
The mains plug or an appliance coupler is used as the disconnect device for 
disconnection from the mains, the disconnect device shall remain readily 
operable. 
Safety 
Operate the Monitor on 100V and 120 V AC only. 
Use the AC power cord specified by ViewSonic and suitable for the voltage where 
you use it. 
The plug is designed, for safety purposes, to fit into the wall outlet only one way. 
If you are unable to insert the plug fully into the outlet, contact your dealer. 
If any liquid or solid object should fall inside the cabinet, stop operating, unplug the 
Monitor immediately and have it checked by qualified service technician. 
If you will not be using the Monitor for a long time, disconnect the power by pulling 
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the plug itself. Do not pull on the cord.  
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Carrying The LCD Monitor 
To prevent dropping the Monitor and causing serious injury, you must follow these 
guidelines: 
Disconnect all cables before carrying the Monitor. 
Carrying the large size Monitor requires at least two or three people. 
When you carry the Monitor, place your hands as illustrated and hold it securely.  
Do not put stress on the LCD panel and the frame around the screen. 
When carrying the Monitor, do not subject it to shocks, vibration, or excessive 
force. 
When lifting or moving the Monitor, hold it securely from the bottom. Place your 
palm directly under the panel. 
Installed on the wall 
Installed with stand 
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Leave at least this space around the set. Do not install the Monitor set as follows: 
Air circulation is blocked. 
Broken pieces 
Do not throw anything at the LCD. 
Doing so may break the screen glass and cause serious injury. 
If the surface of the LCD cracks, unplug the AC power cord before touching the 
LCD. Otherwise electric shock may result. 
Handling of broken glass and liquid crystal leakage 
If the LCD panel gets damaged, crystalline liquid leakage may occur, or scattered 
broken glass may result.  
Do not touch broken glass or crystalline liquid which is toxic, with bare hands as 
cuts, poisoning or skin irritation may occur. 
Also do not glass fragments or leaked crystalline liquid get into your eyes or mouth. 
Should either contacted your eyes or mouth, rinse the contacted area thoroughly 
with water and consult your doctor. 
Note 
This television includes a QAM demodulator, which should allow you to receive 
unscrambled digital cable television programming via subscription service to a 
cable service provider. 
The type of programming and signal provided by your cable service provider will 
affect the availability of digital cable television programming in your area. 
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2. Product Specification  
2.1 Product definition 
Product Name   ViewSonic VX2739WM 
Model Number   VS12843 
English 
French 
German 
Spanish 
Italian 
OSD Languages 
Finnish 
Russian 
Japanese 
Korean 
Traditional Chinese 
Simplified Chinese 
TFT LCD Panel and Model #   1st source : CMO M270H1-L01 
Scalar TSUMO88GDI-LF-1 
Input Signal   D-Sub /DVI/HDMI 
Sync Compatibility   Separate Sync / Composite Sync / SOG
Adapter   Internal Power Board 
Power Cable (Refer to APPENDIX B)   Yes 
15 pin mini D-SUB Analog Cable (1.8 m, 
black), with PC 2001. 
Yes 
(Detached cable; refer the Appendix A) 
DVI-D Cable(1.8m, black) with PC 2001 
(refer to Appendix A) 
Audio Cable(1.8m, black) with PC 2001   Yes 
MIC Cable(1.8m, black) with PC 2001   No 
USB Cable (V2.0) 
(1.8m, black) with PC 2001 
Yes 
Yes 
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2.2 Specification 
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Dimensions (with 
647 mm (W) x 490 mm (H) x 250 mm (D) 
stand) 
Physical(W)x(H)x(D) 
Weight 6.8 
LCD   27" Color active matrix TFT LCD 
Pane    CMO M270H1-L01 
Contrast Ratio   1200 :1 (Typ.) 
Display area   597.89 mm (H) x 336.31 mm (V) 
Pixel Pitch   0.3114 mm (H) x 0.3114 mm (V) pixel 
Native Resolution   1920 x 1080 
Speaker Output    2W x 2 
2.3 Front View and Rear View 
N
Name Photo   Texture 
o. 
POLISH # 
1 Front 
ABS 1 
Viewsonic black
8000 
Mold-Tech 
MT-11020 
2 Back 
ABS 1 
Viewsonic black
(Logo is 
POLISH # 
8000) 
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Power 
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3 
button ring 
ABS 1 electroplate silver 
4 Neck 
5 Key button 
6 base 
ABS 1 
Viewsonic black
8000 
Mold-Tech 
POLISH # 
ABS 1 
Viewsonic black
MT-11010 
POLISH # 
ABS 1 
Viewsonic black
8000 
7 base_ring 
Power 
8 
button 
ABS 1 electroplate silver 
1. Black by 
painting at 
core-side 
surface. 
Transluce
nt 
1 
POLISH # 
8000 
2.Power icon by 
Lacer-engravin
PC 
g and then 
painting 
pantone # 427C 
3. Blue LED. 
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** ViewSonic Black_matt 
L* a* b* 
27.47 -0.06 -0.8 
*CIE1976; Polish level = 1200; Follow the Equipment in ViewSonic Lab 
*1. The reference for the cabinet components is the color chip provided by ViewSonic. 
*2. The color difference between any two panel head cabinet components shall be ∆E <0.8, in the 1976  
CIE L*a*b Colorspace. 
*3. The color difference between any two base cabinet components shall be ∆E <0.8, in the 1976 CIE  
L*a*b Colorspace. 
2.4 Audio Interface (Speaker Specification) 
Line input signal   1.0  Vrms @1kHz 
Line input impedance   10 Kohm 
Maximum Amp power output (Watt)   2.4 W @ SPKVDD=5V 4OHM 
Amp -THD   < 10 % THD @1kHz 
Speaker Power rating(Ω /Watt) 4Ω / 2 W 
Signal to Noise Ratio   50 db 
Frequency response   Fo – 20kHz 
SPL.   91 dB (at 0.1w/0.1m) 
FO   820 Hz 
1. 3.5 mm stereo jack 
Line input connection 
2. HDMI 
There should be no audible vibration 
Vibration 
resonance at volume=100% & any 
Freq. 
There should be no affect on the screen 
Screen image 
image stability under any conditions 
Connector PC99 requirement Audio in   Lime Green pantone # 577C 
Cable type / length   3.5mm stereo cable / 1.8m length 
Audio DPMS 
Speakers stay off when the rest of the 
monitor is in power saving 
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2.5 Electrical Requirement 
Horizontal / Vertical Frequency 
Horizontal Frequency   24 – 83 KHZ  
Vertical Refresh Rate   50 – 76 HZ 
Maximum Pixel Clock   Analog : 210 MHz 
Digital : 180 MHz 
Sync Polarity   Independent of sync polarity. 
Support Timing Table   
Item Timing 
640 x 350 @  70 Hz, 31.5 KHz v   v   v   v   DMT. 
1. 
640 x 400 @  60 Hz, 31.5 KHz v   v   v   v   DMT 
2. 
Analog 
Composite 
Separated 
SOG 
Digital - TMDS 
Remark 
For Separated、  SOG and
Composite sync, switch 
640x350@70,640x400@70,
and720x400@70 by [1]+[2]
short cut key ( primary = 
720x400@70) 
For Separate, Composite 
and SOG sync, switch 
640x400@60Hz and 
640 x 400 @  70 Hz, 31.5 KHz v   v   v   v   DMT 
3. 
640x480@60Hz by [1]+[2] 
short cut key (primary = 
640x480@60Hz) 
For Separated、  SOG and
Composite sync, switch 
640x350@70,640x400@70,
and720x400@70 by [1]+[2]
short cut key ( primary = 
720x400@70) 
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4.      640 x 480 @  50 Hz, 24.7 KHz v   v   v      CVT 
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640 x 480 @  60 Hz, 31.5 KHz v   v   v   v   DMT 
For Separate, Composite 
and SOG sync, switch 
5. 
640x400@60Hz and 
640x480@60Hz by [1]+[2] 
short cut key (primary = 
640x480@60Hz) 
6.      640 x 480 @  67 Hz,   35 KHz v   v   v   v   For MAC 
7.      640 x 480 @  72 Hz, 37.9 KHz v   v   v   v   DMT 
8.      640 x 480 @  75 Hz, 37.5 KHz v   v   v   v   DMT 
720 x 400 @  70 Hz, 31.5 KHz v   v   v   v   DMT 
For Separated、  SOG and
Composite sync, switch 
9. 
640x350@70,640x400@70,
and720x400@70 by [1]+[2]
short cut key ( primary = 
720x400@70). 
720 x 480 @  60 Hz, 31.5 KHz v   v   v   v   DTV, For Analog sync, the 
10. 
information OSD shows 
640x480 
11.    720 x 576 @  50 Hz, 31.3 KHz v   v   v   v   DTV 
12.    800 x 600 @  56 Hz, 35.2 KHz v   v   v   v   DMT 
13.    800 x 600 @  60 Hz, 37.9 KHz v   v   v   v   DMT 
14.    800 x 600 @  72 Hz, 48.1 KHz v   v   v   v   DMT 
15.    800 x 600 @  75 Hz, 46.9 KHz v   v   v   v   DMT 
16.    832 x 624 @  75 Hz, 49.7 KHz v   v   v   v   MAC 
1024 x 768 @  50 Hz, 39.6 KHz v   v   v   v   CVT 
For Separated and 
Composite sync, Switch 
17. 
1024x768@50Hz and 
1280x768@50Hz by [1]+[2] 
short cut key (primary = 
1024x768@50Hz) 
18.  1024 x 768 @  60 Hz, 48.4 KHz v   v   v   v   DMT 
19.  1024 x 768 @  70 Hz, 56.5 KHz v   v   v   v   DMT 
20.  1024 x 768 @  72 Hz, 58.1 KHz v   v   v   v   DMT 
21.  1024 x 768 @  75 Hz,   60 KHz v   v   v   v   DMT; 
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For Separated , Composite 
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and SOG, 
Switch 1280x768@75Hz 
and 1024x768@75Hz by 
[1]+[2] short cut key 
(primary = 
1280x768@75Hz) 
22.  1024 x 768 @  75 Hz, 60.2 KHz v   v   v   v   For MAC 
23.  1152 x 864 @  75 Hz, 67.5 KHz v   v   v   v   DMT 
24.  1152 x 870 @  75 Hz, 68.7 KHz v   v   v   v   For MAC 
25.  1152 x 900 @  67 Hz, 62.5 KHz v   v   v   v   For SUN 
26.  1280 x 720 @  50 Hz, 37.5 KHz v   v   v   v   DTV 
27.  1280 x 720 @  60 Hz,   45 KHz v   v   v   v   DTV 
1280 x 768 @  50 Hz, 39.6 KHz v   v   v   v   DMT 
For Separated and 
Composite sync, Switch 
28. 
29. 
30. 
1024x768@50Hz and 
1280x768@50Hz by [1]+[2] 
short cut key (primary = 
1024x768@50Hz) 
1280 x 768 @  60 Hz, 47.8 KHz v   v   v   v   DMT; 
For Composite and SOG, 
Switch 1280x768@60Hz 
and 1360x768@60Hz by 
[1]+[2] short cut key 
(primary = 
1280x768@60Hz) 
1280 x 768 @  75 Hz, 60.3 KHz v   v   v   v   DMT; 
For Separated , Composite 
and SOG, 
Switch 1280x768@75Hz 
and 1024x768@75Hz by 
[1]+[2] short cut key 
31.  1280 x 800 @  60 Hz, 49.7 KHz v   v   v   v   DMT 
32.  1280 x 800 @  75 Hz,   62.8 KHz v   v   v   v   DMT 
33.  1280 x 960 @  50 Hz, 49.4 KHz v   v   v   v   DMT 
(primary = 
1280x768@75Hz) 
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34.  1280 x 960 @  60 Hz, 60.0 KHz v   v   v   v   DMT 
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35.  1280 x 960 @  75 Hz, 75.2 KHz v   v   v   v   DMT 
36.  1280 x 1024 @  50 Hz, 52.7 KHz v   v   v   v   DMT 
37.  1280 x 1024 @  60 Hz,   64 KHz v   v   v   v   DMT 
38.  1280 x 1024 @  75 Hz,   80 KHz v   v   v   v   DMT 
1366 x 768 @  60 Hz, 47.7 KHz v   v   v   v   DMT 
For Composite and SOG, 
Switch 1280x768@60Hz 
39. 
and 1360x768@60Hz by 
[1]+[2] short cut key 
(primary = 
1280x768@60Hz) 
40.  1440 x 900 @  60 Hz   55.9 KHz v   v   v   v   DMT 
41.  1440 x 900 @  75 Hz   70.6 KHz v   v   v   v   DMT 
1400 x 1050 @  60 Hz   65.3 KHz v   v   v   v   DMT; 
For Separated , Composite 
and SOG, 
Switch 1400x1050@60Hz 
42.  
and 1680x1050@60Hz by 
[1]+[2] short cut key 
(primary = 
1680x1050@60Hz) 
43.  1400 x 1050 @  75 Hz   82.3 KHz v   v   v   v   DMT 
44.  1600 x 1200 @  60 Hz   75.0 KHz v   v   v   v   DMT 
45.  1680 x 1050 @  60 Hz   64.7 KHz v   v   v   v   DMT 
1680 x 1050 @  60 Hz   65.3 KHz v   v   v   v   DMT; 
For Separated , Composite 
and SOG, 
Switch 1400x1050@60Hz 
46.  
and 1680x1050@60Hz by 
[1]+[2] short cut key 
(primary = 
1680x1050@60Hz) 
47. 1920x1080 @ 60 
48.   480i   @ 60 Hz     
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49.   480p   @ 60 Hz        9   9   9   9   
50.   576i   @ 50 Hz     
 9   
51.   576p   @ 50 Hz        9   9   9   9   
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52.   720p   @ 50 Hz        9   9   9   9   
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53.   720p   @ 60 Hz        9   9   9   9   
54.   1080i   @ 50 Hz     
55.   1080i   @ 60 Hz     
56.   1080p   @ 50 Hz        9   9   9   9   
57.   1080p   @ 60 Hz        9   9   9   9   
*1. Tolerance    ±2KHz. (if no over lapping issue)≧    
*2. Any timing not in the list, it should display as normal or show on “OUT OF RANGE” OSD 
message without blanking 
 9   
 9   
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3. Front Panel Function Control Description   
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3.1 Front Panel Hardware Controls 
Power Switch   AC Power Switch on the back cover 
Soft Power Switch on the front bezel 
Power LED (Front Head)   Blue – ON 
Amber – Active Off 
Dark = Soft Power Switch OFF 
Front Panel Controls (Head) 
[ 1 ] [ 2 ] [ ] [▲ ] [▼ ] 
[ ] Power  
[ 1 ] Button 1  
[ 2 ] Button 2 
[▲ ] Up arrow button 
[▼ ] Down 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 
3.2 Short Cuts Function from the button 
[1] Main 
(refer to segment 4-6-3) 
[2]   Input toggle (Analog or DVI or HDMI; refer to refer to 
EDID Text) 
[▼ ]   To immediately activate Audio Adjust menu. 
 [▲]   To immediately activate Contrast / Brightness OSD  
Menu. 
[▼ ]+ [▲ ]   1. In the Audio mode, recall both of Volume and Mute 
to default without OSD message.( Under Volume 
adjust sub-menu, recall Volume to default without 
OSD message.) 
2. In the BT / CR mode, recall both Contrast and 
Brightness to default in its menu without OSD 
message. (Under Contrast or Brightness adjust 
sub-menu, recall Contrast or Brightness to its default 
without OSD message.) 
* While OSD menu off, recall CR/ BT/ Audio volume 
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and mute to default without OSD message 
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[1] + [2]   Toggle 720x400 and 640x400 mode when input 
720x400 or 640x400 mode 
* Default = 720 x 400 
[1] + [▼ ] + [▲ ] 
(Keep pushing 5 sec) 
White Balance 
1. It will not shown on user’s guide 
2. OSD message as below, 
(Image = no blanking) 
3. Recommend environment 
    3.1. Optical (Best) input timing = 640 x 480 @ 
60Hz; 
      Following timing modes also 
recommended, 
      800 x 600 @ 60 Hz 
1024 X 768 @ 60 Hz 
  3.2. Pattern as below, 
[1] + [▲]   OSD Lock / Unlock (refer to segment 4-6-4)  
[1] + [▼ ]   Power Lock / Unlock (refer to segment 4-6-5) 
[2] + [▼ ]   Toggle DDC/CI and DDC/2B (DDC/CI enable/disable) 
and show following message for 3 seconds, 
When switch to DDC/CI 
When switch to DDC/2B 
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Default = DDC/CI 
Signal + [2] + [ ] Factory 
Remark : All the short cuts function are only available while OSD off 
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4. Circuit Description  
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CON3 
CON1 
CON5   CON6 
J6 
CON7 
CON8  CON2
J4 or 
J7 
J3 
Power Circuit:  
Power board provided +5VD(CON1.1~CON1.2) and +5V (CON3~CON4),Which 
+5V is for system and LCD Panel,+5VD provided for Audio AMP. 
At AC power on status,Power off mode and standby mode,Power source only 
provided +5V to TSUMO88GDI,Monitor total power consumption will be less the 
1W. 
  The status for +5VD and +5V as below:  
+5V will provide:  
1. via Q4、Q3: VLCD(for LCD panel) 
2. via U9 transferred to +3.3V(for TSUMO88GDI、 audio AMP and system related 
parts) 
3. via U9 transferred to +1.8V(for TSUMO88GDI) 
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+5VD will provide:  
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1. via Q3: +5VA(for audio AMP)  
2. via J6 to USB HUB(for GL805G) 
Backlight Control:  
  CON1.9 is inverter on/off control pin,which 5V is ON,0V is OFF; CON1.10 is 
Brighthess control pin,control way is PWM,0% is darkest,100% is brilliant. 
LCD panel power and signal:  
  CON5 is FFC connector which provided for LCD panel LVDS,the LVDS singnal 
sent from TSUMO88GDI. 
AUDIO:  
  The outputs for Audio are CON7、CON6、J4、 J3, CON7 is I2S digital signal, 
which proceed to TSUMO88GDI, transferred to internal signals, to U12(Audio 
AMP),to speaker via CON6, or earphone via J4. 
VIDEO:  
  The outputs for video are CON7、CON8、 CON2 as below:  
CON7: HDMI 
CON8: DVI 
CON2: D-SUB 
  These signals will transmit to TSUMO88GDI,transferred to LVDS, to LCD Panel 
via CON5 for programming. 
KEYPAD & LED DISPLAY:  
  CON3 is KEY and LED board connector, controlled way for key board is from 
ADC, build in TSUMO88GDI. When user press the buttons, identified by 
TSUMO88GDI fordifferent voltage to control the right action by TSUMO88GDI. 
  Controlled way for LED board is from GPIO, Power off:LED is dark, Power on:  
LED is blue light, standby mode: LED is orange light, which controlled by 
TSUMO88GDI. 
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5. Adjusting Procedure  
5.1 Function Control Description 
5.1.1 Main Menu OSD Table 
Main Menu 
Level 1   Level 2   Level 3 
Auto Image Adjust 
1. Key button definition: 
[1]: OSD off 
[2]: Execute the selected function 
[Up]: Rolling up the slider  
(When push the button on the top position, 
the slider shall go down to the bottom item) 
[Dn]: Rolling down the slider  
(When push the button on the bottom 
position, the slider shall go down to the top 
item) 
2. Under sRGB or DCR mode, the 
Contrast/Brightness shall be disabled with 
fate-out color. And it should not be selected. 
1. Background = blanking 
2. The message OSD position 
is at the center. 
3. After auto tune, OSD shall 
be off 
4. Only for analog mode 
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Contrast/Brightness 
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Contrast          
1. Adjust range = 0 to 100 
2. Default = 70 
3. Key button definition: 
[1] = Back to Main Menu or 
OSD off 
Key button definition: 
[1]: Back to previous OSD 
status 
[2]: select to adjust value 
setting. 
[Up]: Move up the slider  
[Dn]: Move down the slider 
    (depend on previous 
status) 
 [Up] = Increase the OSD 
value setting 
[Dn] = Decrease the OSD 
value 
[Up]+[Dn]: Recall to default 
Brightness         
1. Adjust range = 0 to 100 
2. Default = 100 
3. Key button definition: 
[1] = Back to Main Menu or 
OSD off 
    (depend on previous 
status) 
 [Up]: Increase the OSD value 
setting 
[Dn]: Decrease the OSD value
[Up]+[Dn]: Recall to default 
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Input Select 
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D-SUB 
Step 1: Turn off OSD. 
Step 2: 
1. Target video input port = 
Analog 
2. If signal detected from 
target port, change to 
target port. 
3. If no signal detected from 
1. Show on existing input port 
by white-background color 
2. Key button definition: 
[1]: Back to previous OSD 
status 
[2]: Change to the selected 
input port 
[Up]: Move up the slider  
[Dn]: Move down the slider 
target port, keep existing 
input port. 
Step 3: Show on Input 
Message OSD at the 
right-top corner of screen for 
1 second. 
DVI 
Step 1: Turn off OSD. 
Step 2: 
1. Target video input port = 
Digital 
2. If signal detected from 
target port, change to 
target port. 
3. If no signal detected from 
target port, keep existing 
input port. 
Step 3: Show on Input 
Message OSD at the 
right-top corner of screen for 
1 second. 
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HDMI PC 
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Step 1: Turn off OSD. 
Step 2: 
1. Target video input port = 
HDMI PC 
2. If signal detected from 
target port, change to 
target port. 
3. If no signal detected from 
target port, keep existing 
input port. 
Step 3: Show on Input 
Message OSD at the 
right-top corner of screen for 
1 second. 
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HDMI A V 
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Step 1: Turn off OSD. 
Step 2: 
1. Target video input port = 
HDMI AV 
2. If signal detected from 
target port, change to 
target port. 
3. If no signal detected from 
target port, keep existing 
input port. 
Step 3: Show on Input 
Message OSD at the 
right-top corner of screen for 
1 second. 
Note: HDMI input default 
setting is HDMI AV, and 
user can change to HDMI 
PC and saved. 
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Audio Adjust 
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1. The selected icon in Mute 
Volume 
will be highlighted 
2. Key button definition: 
[1]: Back to previous OSD 
status 
[2]: selected audio setting 
[Up]: Move up the slider  
[Dn]: Move down the slider 
3. No signal, no output 
1. Adjust range = 0 to 100 
2. Default = 50 
3. Key button definition: 
[1]: Back to Audio Adjust OSD
[Up]: Increase the volume 
setting 
[Dn]: Decrease the volume 
setting 
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memorize its status after 
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DC/AC Off to On  
Mute 
1. Default = Off 
; = On  
  = Off  
2. Key button definition: 
[1]: Back to Audio Adjust OSD
 
[2]: :Selected setting 
3. When Mute function is 
selected, any change in 
Volume will disable to Mute. 
Audio Input   HDMI 
Change audio source 
to HDMI 
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1. For HDMI mode only 
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(Under VGA/DVI mode, this is 
disable). 
2. Default = HDMI 
3. Show on existing input port 
by white-background color 
4. Key button definition: 
AUDIO IN 
Change audio source 
to jack plug (AUDIO 
IN) 
Color Adjust 
[1] = Back to Main Menu 
[2]: selected setting 
sRGB 
Change Color setting to sRGB
9300K 
Change Color setting to 9300K
7500K 
Change Color setting to 7500K
6500K 
Change Color setting to 6500K
5000K 
Change Color setting to 5000K
Page 29
CONFIDENTIAL – DO NOT COPY
User Color 
Red 
1. Show on existing input port 
by white-background color 
2. Default = 6500K 
3. Key button definition: 
[1]: Back to previous OSD 
status 
[2]: Change to the selected 
color setting 
[Up]: Move up the slider 
[Dn]: Move down the slider 
4. Under DCR mode (Dynamic 
Contrast = On), sRGB shall 
be disabled with fate-out 
color. And it should not be 
selected. 
Change Color setting to user 
color 
1. Adjust range = 0 to 
100 
2. Default = 100 
3. Key button 
definition: 
[1]: Back to Color 
Adjust OSD 
[2]: selected setting. 
 [Up]: Increase the 
OSD value 
setting 
[Dn]: decrease the 
OSD value 
setting 
Green 
1. Adjust range = 0 to 
100 
2. Default = 100 
3. Key button 
definition: 
[1]: Back to Color 
Adjust OSD 
[2]: selected setting. 
 [Up]: Increase the 
OSD value 
setting 
[Dn]: decrease the 
OSD value 
setting 
Page 30
Blue 
CONFIDENTIAL – DO NOT COPY
1. Adjust range = 0 to 
100 
2. Default = 100 
3. Key button 
definition: 
[1]: Back to Color 
Adjust OSD 
[2]: selected setting. 
 [Up]: Increase the 
OSD value 
setting 
[Dn]: decrease the 
OSD value 
setting 
Information 
PC timing – Display 
Resolution 
Video timing – Display Video 
Format 
Page 31
CONFIDENTIAL – DO NOT COPY
Key button definition: 
[1]: Back to Main Menu OSD 
Manual Image 
Adjust
1. Key button definition: 
[1]: Back to previous OSD 
status 
[2]: Execute the selected 
H./V. Position  
Horizontal Position 
1. Adjust range = 0 to 
100 
2. Key button 
definition: 
[1]: Back to Manual 
Image Adjust 
OSD 
[2]: selected setting.
[Up]: Increase the 
OSD value 
setting 
[Dn]: Decrease the 
OSD value 
Page 32
function 
CONFIDENTIAL – DO NOT COPY
Vertical Position 
[Up]: scroll up the slider  
  (When push the button on 
the top position, the slider 
shall go down to the  
bottom item 
[Dn]: Scroll down the slider  
  (When push the button on 
the bottom position, the 
slider shall go down to the 
top item 
2. Under Digital mode, all the 
H./V. Position, Horizontal 
Size and Fine Tune shall 
be disabled with fate-out 
color. And it should not be 
selected. 
3. Under native mode, 
Horizontal Size 
1. Adjust range = 0 to 
100 
2. Key button 
definition: 
[1]: Back to Manual 
Image Adjust 
OSD 
[2]: selected setting.
[Up]: Increase the 
OSD value 
setting 
[Dn]: Decrease the 
OSD value 
Sharpness shall be 
disabled with fate-out 
color. And it should not be 
selected. 
4. Under SRGB mode, 
Dynamic Contrast shall be 
disabled with fate-out 
color. And it should not be 
selected. 
1. Adjust range = 0 to 100 
2. Key button definition: 
[1]: Back to Manual Image 
Adjust OSD 
[Up]: Increase the OSD 
value setting 
[Dn]: Decrease the OSD 
value 
Page 33
Fine Tune 
CONFIDENTIAL – DO NOT COPY
1. Adjust range = 0 to 100 
2. Key button definition: 
[1]: Back to Manual Image 
Adjust OSD 
[Up]: Increase the OSD 
value setting 
[Dn]: Decrease the OSD 
value 
Page 34
Sharpness 
CONFIDENTIAL – DO NOT COPY
1. Adjust range =  {0 / 25 / 50 / 
75 / 100} 
2. Default = 50 
3. Key button definition: 
[1]: Back to Manual Image 
Adjust OSD 
[Up]: Increase the OSD 
value setting 
[Dn]: Decrease the OSD 
value 
Page 35
Dynamic Contrast 
CONFIDENTIAL – DO NOT COPY
Swap on and off the Dynamic 
Contrast function 
Default = Off 
; = On 
  = Off 
When Dynamic Contrast is on, 
below functions will be 
disabled: 
* Brightness/Contrast menu 
* SRGB selection in Color 
Adjust 
* White balance hot key 
* DDC/CI BR/CT adjustment 
Response Time 
Standard 
Over Drive = off 
Advanced 
Over Drive = Level 1 
( best quality with over 
drive )  
Page 36
1. Show on existing Response 
CONFIDENTIAL – DO NOT COPY
Time setting by 
white-background color 
2. Key button definition: 
[1]: Back to previous OSD 
status 
[2]: Change to the selected 
Ultra Fast 
Over Drive = Level 2 
( faster than level 1 for 
spec claim) 
Response Time setting. 
[Up]: Scroll up the slider  
  (When push the button on 
the top position, the slider 
shall go down to the  
bottom item) 
[Dn]: Scroll down the slider  
  (When push the button 
on the bottom position, the 
slider shall go up to the top 
item) 
3. Default = Standard  
Aspect Ratio   4:3  
Change aspect ratio to 
4:3 
Page 37
1. Show on existing Aspect 
CONFIDENTIAL – DO NOT COPY
Ratio setting by 
white-background color 
2. Key button definition: 
[1]: Back to previous OSD 
status 
[2]: Change to the selected 
Full Screen  
Fill screen with panel 
native aspect ratio. 
Display Mode setting. 
[Up]: Scroll up the slider  
  (When push the button 
on the top position, the 
slider shall go down to the  
bottom item) 
[Dn]: Scroll down the slider 
(When push the button 
on the bottom position, the 
slider shall go up to the top 
item) 
3. Default = full screen 
Note :  1.When input signals 
are wide format, this 
function is disable. 
2.When input signals are 
non-wide format. this 
function is enable. 
Page 38
Display Mode 
CONFIDENTIAL – DO NOT COPY
1. This function toggles RGB 
and YUV display mode. 
2. Show on existing Display 
Mode setting by 
white-background color 
3. Key button definition: 
RGB Mode 
Set color space to 
RGB mode for PC 
timing mode 
[1]: Back to previous OSD 
status 
[2]: Change to the selected 
Display Mode setting.  
[Up]: Scroll up the slider  
  (When push the button 
on the top position, the 
slider shall go down to the  
bottom item) 
[Dn]: Scroll down the slider  
  (When push the button 
on the bottom position, the 
slider shall go up to the top 
item) 
4. Save PC timing and DTV 
timing setting separately. 
5. Default = RGB Mode ( DVI  
&VGA) , 
6. HDMI is auto detected by 
Info Frame : , 
    YPbPr -> YUV 
Page 39
mode, 
CONFIDENTIAL – DO NOT COPY
YUV Mode 
    Non-YPbPr -> RGB 
mode. 
7. It will recall to default after 
Set color space to 
YUV mode for HD 
timing mode 
AC/DC on/off or mode change.
 ECO 
Standard 
OSD adjust range = 0 
to 100 
1. This function toggles ECO 
mode. 
2. Show on existing ECO Mode 
setting by white-background 
color 
3. Key button definition: 
[1]: Back to previous OSD 
status 
[2]: Change to the selected 
Display Mode setting.  
[Up]: Scroll up the slider  
  (When push the button 
on the top position, the 
slider shall go down to the  
bottom item) 
[Dn]: Scroll down the slider  
  (When push the button 
on the bottom position, the 
slider shall go up to the top 
Optimize 
OSD adjust range = 0 
to 100 
Page 40
item) 
CONFIDENTIAL – DO NOT COPY
4. Default = Standard 
5. Under sRGB mode, ECO 
Conserve 
OSD adjust range = 0 
to 100  
Mode shall be disabled with 
fate-out color. And it should 
not be selected. 
6.  No matter DCR on or off, 
lamp current will be changed 
by ECO mode change. 
7.  While ECO or DCR setting 
changed, the lamp current 
shall be updated to new 
setting immediately. 
8. Do not lock Contrast or 
Brightness OSD for ECO 
function 
9.  Following is the lamp current 
chart, 
41 
Page 41
Setup Menu 
CONFIDENTIAL – DO NOT COPY
1. Key button definition: 
 [1]: Back to Main Menu 
OSD 
[2]: Execute the selected 
function 
[Up]: Scroll up the slider  
(When push the button 
on the top position, the 
slider shall go down to 
the bottom item) 
[Dn]: Scroll down the slider  
(When push the button 
on the bottom position, 
the slider shall go down 
to the top item) 
Language Select 
1. Show on existing input port 
by red color 
2. Key button definition: 
[1]: Back to previous OSD 
status 
[2]: Change to the selected 
language setting 
[Up]: Scroll up the slider  
  (When push the button on 
the top position, the slider 
shall go down to the  
bottom item 
[Dn]: Scroll down the slider  
  (When push the button on 
the bottom position, the 
slider shall go down to the 
top item 
English 
Set OSD language to 
English and keep in 
Language Select OSD
French 
Set OSD language to 
French and keep in 
Language Select OSD
German 
Set OSD language to 
German and keep in 
Language Select OSD
Spanish 
Set OSD language to 
Spanish and keep in 
Language Select OSD
Italian 
Set OSD language to 
Italian and keep in 
Language Select OSD
Finnish 
Set OSD language to 
Finnish and keep in 
Language Select OSD
Russian 
Set OSD language to 
Russian and keep in 
Language Select OSD
Japanese 
Set OSD language to 
Japanese and keep in 
Language Select OSD
Korean 
Set OSD language to 
Korean and keep in 
Language Select OSD
Page 42
Traditional Chinese 
CONFIDENTIAL – DO NOT COPY
Set OSD language to 
Simplified Chinese 
and keep in Language 
Select OSD 
Simplified Chinese 
Set OSD language to 
Traditional Chinese 
and keep in Language 
Select OSD 
Resolution Notice 
Swap on and off the Resolution 
Notice function 
Page 43
OSD Position 
CONFIDENTIAL – DO NOT COPY
OSD H. Position   
1. Adjust range = 0 to 
100 
2. Default = 50 
3. Key button 
definition: 
[1]: Back to Setup 
Menu OSD 
[2]: selected 
setting[Up]: 
Increase the 
OSD value 
setting (move 
OSD right) 
[Dn]: Decrease the 
OSD value 
setting (move 
OSD left) 
[Up]+[Dn]: Recall to 
default value 
Page 44
OSD V. Position   
CONFIDENTIAL – DO NOT COPY
1. Adjust range = 0 to 
100 
2. Default = 50 
3. Key button 
definition: 
[1]: Back to Setup 
Menu OSD 
[2]: selected setting
[Up]: Increase the 
OSD value 
setting (move 
OSD up) 
[Dn]: Decrease the 
OSD value 
OSD Time Out 
setting (move 
OSD down) 
[Up]+[Dn]: Recall to 
default value 
5 
Set OSD Time Out to 
5 Seconds 
15 
Set OSD Time Out to 
15 Seconds 
30 
Set OSD Time Out to 
30 Seconds 
Page 45
CONFIDENTIAL – DO NOT COPY
1. Adjust range = 5, 15, 30, 60
2. Default = 15 
3. Key button definition: 
[1]: Back to Setup Menu 
OSD 
[Up]: Increase the OSD 
60 
Set OSD Time Out to 
60 Seconds 
value setting  
[Dn]: Decrease the OSD 
value setting 
[Up]+[Dn]: Recall to default 
value 
OSD Background 
Swap on and off the OSD 
Background 
; = Non-transparent 
  = Transparent 
Page 46
Auto Power Off 
CONFIDENTIAL – DO NOT COPY
Swap on and off the  Auto 
Power Off function  
Power off the display 
automatically when no signal is 
detected for 3 minutes. 
; = On 
  = Off 
Note :  
1.  When no signal input with 
Auto Power Off = ON , the 
display will go into power 
saving first. After 3 minutes, the 
display will turn off 
automatically. 
2. When no signal input with 
Auto Power Off = OFF , the 
display will go into power 
saving as normal display. 
3.    Default = Off 
4.    Memory Recall will call 
back the setting to default. 
5.    When push Power Lock 
hot key under Auto Power 
Off = On, the message OSD 
will show on for 3 seconds 
(Power Lock function is 
disabled), 
6.    The function will be 
disabled when power button 
locked. 
Page 47
Sleep 
CONFIDENTIAL – DO NOT COPY
30 Minutes 
Set time before going 
to Sleep mode = 30 
Minutes 
45 Minutes 
Set time before going 
to Sleep mode = 45 
Minutes 
60 Minutes 
Set time before going 
to Sleep mode = 60 
1. Adjust time range before 
going to sleep mode. Time 
range = 30, 45, 60, 120 
(Minutes) and Off. 
2. Default = Off 
3. When Sleep mode is 
triggered, the power of 
monitor will be turned off. 
4. Only active in HDMI Mode 
(both in AV&PC) 
5. Key button definition: 
[1]: Back to previous OSD 
status 
[2]: Change to the selected 
sleep time setting 
[Up]: Rolling up the slider  
(When push the button 
Minutes 
120 Minutes 
Set time before going 
to Sleep mode = 120 
Minutes 
Off 
Disable Sleep mode. 
Memory Recall 
on the top position, the 
slider shall go down to 
the bottom item 
[Dn]: Rolling down the slider 
(When push the button 
on the bottom position, 
the slider shall go down 
to the top item 
Page 48
CONFIDENTIAL – DO NOT COPY
1. Background = blanking 
2. Recall white balance to 
factory setting 
3. Recall all the OSD setting to 
the default. (include the 
R/G/B in User Color) 
4. Show the message OSD 
position is at the center for 
3 seconds. 
5. Clean FIFO timing mode 
buffer 
6. Execute Auto Image Adjust 
Note: Memory Recall should 
not effect on Language, Power 
Lock Settings or Input 
Priority 
Page 49
CONFIDENTIAL – DO NOT COPY
5.1.2 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 *1. If the user then tries to access the OSD by pressing any 
of the buttons, a message will appear on the screen for 3 seconds showing 
"OSD Locked" *2. The OSD lock will be deactivated by pressing the front panel 
control buttons [1] + [▲ ] again for 10 seconds*3. 
*1 The OSD Lock message as below, 
Range = 0 to 10 
*2 The OSD Locked message as below, 
*3 The OSD Unlock message as below, 
Range = 0 to 10 
*4 When the OSD is locked will lock all functions, including “Volume”, “Mute” 
and others. 
*5 Status bar indicating OSD Lock or Unlock is in progress and when complete 
will indicate “OSD Locked” or “OSD Unlocked” for 3 seconds as below, 
OSD Locked 
OSD Unlocked 
Page 50
CONFIDENTIAL – DO NOT COPY
*6 When OSD appears on screen, the OSD Lock/Unlock short cut key will be 
disabled. 
5.1.3 Power Lock short cuts function for the buttons 
The Power lock will be activated by pressing the front panel control buttons [1] + 
[▼ ] for 10 seconds *1. 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 
*2
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 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 lock will be deactivated by pressing the front panel control buttons [1] + [▼]  
again for 10 seconds
*3
. 
*1 The Locking Power Button message as below, 
Range = 0 to 10 
*2 The Power Button Locked message as below, 
*3 The Unlocking Power Button message as below, 
Range = 0 to 10 
*4 Status bar indicating Power Button Lock or Unlock is in progress and when 
complete it will indicate “Power Button Locked” or “Button Unlocked” for 3 
seconds as below, 
Power Button Locked 
Page 51
CONFIDENTIAL – DO NOT COPY
Button Unlocked 
*5 When OSD appears on screen, the OSD Lock/Unlock short cut key will be 
disabled. 
5.1.4 Input Signal Notice Actions 
1. The Input Signal Notice OSD appears 1 second when power turns on or 
change input signal. 
2. The Input Signal Notice OSD position is on the right-top side of image.  
3. The OSD message as below, 
5.1.5 Resolution Notice Actions 
1. Resolution Notice OSD should show on screen  after changing to non-native 
mode for 30 sec.  
Page 52
CONFIDENTIAL – DO NOT COPY
2. Key button definition: 
[1]: Turn off the OSD message. 
[2]: Turn off the OSD message and disable Resolution Notice function 
3. The OSD should disappear after 10 sec or by pushing button [1] or [2] 
4. After the OSD turns off, it will not show on again before next timing change, 
input change or power off. 
5. Resolution Notice function should be disabled when push button [2] under 
Resolution Notice OSD 
6. The “1920x1080” will be replaced by actual panel resolution. 
5.1.6 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) 
5.1.7 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 
5.1.8 Out of range 
While non-defined timing is detected, following OSD message will keeps showing 
on, 
Page 53
CONFIDENTIAL – DO NOT COPY
1. If the timing is over spec (Fh, Fv or dot clock), the image shall be blanking, and 
OSD background shall be non-transparent. 
2. If the timing is inspect but not defined, the image shall be non-blanking. 
5.1.9 No signal  
While no signal is detected, the following OSD message shall shows on 3 
seconds then go in to power saving. 
OSD Background = Non-transparent 
Image = Blanking 
Page 54
5.2 BIOS /Firmware Update SOP 
CONFIDENTIAL – DO NOT COPY
Step1: Prepare a PC and the target HDTV. 
Step 2: Connect isp board by usb cable (from PC to isp board) and D-sub cable 
(from isp board to monitor). 
Step 3: Copy the .bin format file (for example, VX2739WM_252.bin) to a folder of  
the computer from the CD.  
Step 4: Double click the ISP Tool with the CD as the following icon to open the ISP 
tool. 
Step 5: The outline of isp tool. 
Step 6: Click on the “Connect” icon. A pop menu will show up. Press the “OK” 
button. 
Page 55
CONFIDENTIAL – DO NOT COPY
Step 7: Click on the “Read” icon. Press the “Read” button and select the .bin file  
which is copied to the folder of the computer. Press the “open” button.  
Page 56
CONFIDENTIAL – DO NOT COPY
Step 8: Click on the “Auto” icon and press the “Run” button. 
Step 9: Flash is running. 
Page 57
CONFIDENTIAL – DO NOT COPY
Step 10: Flash is finished. 
5.3 Disassembly Procedure 
Please follow the information provided in this section to perform the complete 
disassembly procedure of the LCD panel. Be sure to use proper tools described 
below. 
LCD consists of various Parts. This chapter describes the procedures for the 
complete parts disassembly. In addition, in between procedures, the detailed 
disassembly procedure of individual parts will be provided for your service needs. 
The disassembly procedure consists of the following steps: 
1. Base 
2. LED 
3. Front 
4. Keypad 
5. PSU 
6. Main 
Page 58
7.    Speakers 
CONFIDENTIAL – DO NOT COPY
Base & Cover 
1. Remove 4 screws (M4*13L (X)) that fixing on the neck. 
2. Push down the Base and remove it.  
Page 59
CONFIDENTIAL – DO NOT COPY
3. Remove the 1 screw to unplug the stand neck.  
4. Remove the 4 screws to take off the Hinge. 
Page 60
5. Then remove the screws.  
CONFIDENTIAL – DO NOT COPY
6. Take off the Rear Cover carefully. 
Page 61
LED Board 
CONFIDENTIAL – DO NOT COPY
1. Take off the 4 tapes on the LVDS wire and Keypad wire.  
2. Unplug the power wire and keypad wire.  
3. Remove the 2 screws on the LED board.  
Page 62
4. Unplug the LED board wire and take off the LED board.   
CONFIDENTIAL – DO NOT COPY
Front Cover 
1. Take off the Shielding from the Panel.  
2. Take off the Front Cover from the Panel.  
Page 63
Keypad 
CONFIDENTIAL – DO NOT COPY
Take off the Keypad from the Front Cover.  
PSU Board 
1. Remove 4 screws on the Shielding. 
Page 64
CONFIDENTIAL – DO NOT COPY
2. Unplug the power cable from the PSU board.  
3. Remove the 4 screws and take off the PSU board.  
Page 65
MainBoard 
CONFIDENTIAL – DO NOT COPY
1. Remove 4 screws that fixing on the MainBoard. 
3. Disconnect the LVDS and Keypad Cable from MainBoard and remove the 
MainBoard. 
Page 66
Speaker 
CONFIDENTIAL – DO NOT COPY
1. Remove the 4 screws of the Speaker.  
2. Disconnect the Speaker cable on the shielding and remove the Speakers.  
Page 67
CONFIDENTIAL – DO NOT COPY
6. Troubleshooting Flow Chart 
Can not boot 
Can not boot 
Check AC-power 
whether is OK 
OK 
Disassembles the system 
NG 
Replacement the 
AC Power 
Supply 
Equipment 
to remove the PSU, and 
supplies the power directly 
OK 
The nondefective 
Replace the PSU 
and Test 
NG 
Replacement MB and 
Abnormal screen 
1.Test after boot, the screen left bottom has the streaks 
2. Purple screen after booting 
3. White screen appears after booting 
Page 68
4. White-black screen after booting 
CONFIDENTIAL – DO NOT COPY
5. Black screen after booting 
Abnormal screen 
Double check 
abnormal system 
Disassembles LCD 
cover &check LVDS 
cable at its place 
Assembly 
machine to test 
FAIL 
Test LVDS cable 
PASS 
NG 
Rearrange LVDS 
cable & assembly 
machine to test 
PASS 
PASS 
FAIL 
Replace PSU 
&test
PASS 
FAIL 
Replace MB 
The nondefective 
&test
PASS 
FAIL 
Replace 
PANE L &test 
PASS 
Page 69
CONFIDENTIAL – DO NOT COPY
Abnormal sound 
1. No sound 
2. Abnormal sound; 
3. TV mode with noise. 
4. Intermittent sound 
Page 70
Abnormal sound  
CONFIDENTIAL – DO NOT COPY
Reset abnormal 
machine 
Disassembles LCD 
cover &check speaker 
cable
Reassembly 
machine to test 
FAIL 
Replace Speaker 
PASS 
NG
PASS 
PASS 
cable and test 
FAIL 
PASS 
The nondefective 
PASS 
FAIL 
Replace 
S
eaker&test 
Replace MB 
&test 
Page 71
CONFIDENTIAL – DO NOT COPY
Keypad Board does not work  
OSD is unstable or not working 
Y
Is Key Pad Board 
connecting normally? 
Y
Is Button Switch 
normally? 
Y
N
Connect Key Pad Board 
N
Replace Button Switch 
Is Key Pad Board 
Normally? 
Y
Check Main Board 
N
Replace Key Pad Board 
Page 72
After boot power light does not bright 
CONFIDENTIAL – DO NOT COPY
After boot power 
light does not bright 
Reset the abnormal 
machine 
FAIL 
Disassemble the 
LCD cover and 
check the IR cable 
NG
PASS 
Replace new IR 
PASS 
The nondefective 
cable and test  
FAIL 
PASS 
Replace IR 
board and test  
FAIL 
PASS 
Replace MB 
and test 
Page 73
7. Block Diagrams  
CONFIDENTIAL – DO NOT COPY
Page 74
8. Schematic Diagrams  
CONFIDENTIAL – DO NOT COPY
Page 75
CONFIDENTIAL – DO NOT COPY
Page 76
CONFIDENTIAL – DO NOT COPY
Page 77
9. PCB Layout Diagrams  
CONFIDENTIAL – DO NOT COPY
Page 78
10. Exploded Diagram and Exploded Parts List 
CONFIDENTIAL – DO NOT COPY
Page 79
EXPLODED PARTS LIST (VX2739wm-1/VX2739wm-CN)
CONFIDENTIAL – DO NOT COPY
ViewSonic Model Number: VS12843 
Rev: 1a
Item ViewSonic P/N  Ref. P/N  Description  Q'ty
A
1
A
2
A
3
HW-00009268
4
HW-00009267
5
PL-00008859
6
A
7
C-00010201
8
A
9
M-00008598
10
HW-00009272
11
A
12
HW-00009269
13
HW-00009270
14
HW-00009271
15
HW-00009275
16
HW-00009273
17
A
18
A
19
A
20
PL-00008860
21
C-00010202
22
CB-00009417
23
A
24
A
25
A
26
A
27
A
28
A
29
13EB-1CQ0201 EB1C VX2739 FRONT COVER  1 
13EB-1CQ0501 EB1C VX2739 POWER KEY DECOR  1 
13EB-1CQ0301 EB1C VX2739 POWER KEY  1 
13EB-1CB0301 EB1C VX2739 SHIELDING ASSY  1 
13EB-1CN0101 EB1C VX2739 HINGE  1 
13EB-1CQ0101 EB1C VX2739 FUNCTION KEY  1 
13EB-1CQ0601 EB1C VX2739 STAND NECK  7 
13EB-1CB0201 EB1C VX2739 REAR COVER ASSY  4 
13EB-1CQ0401 EB1C VX2739 STAND BASE  4 
13EB-03U0301 B05 RUBBER FOOT D=20.6  10 
131C-000R000 SCREW M4*10 
131A-004U000 SCREW M4*8L 
131A-007U000 SCREW M3*6.0 
131A-00JG000 SCREW M3*4+6L 
131A-007G000 SCREW M4*6L 
1302-00EW000 STAND OFF #4-40*7+5 W-NI  1 
131C-006C000 SCREW M3*8L 
13EB-1BU0101 EB1B VX2439 HAND SCREW M4-13L 1 
13EB-1BQ0801 EB1B VX2739 STAND RING  1 
13EB-1CN0301 EB1C/VX2739/LOGO PLATE  1 
13EB-1CB0401 EB1C/VX2739/STAND NECK ASSY  1 
13EB-1CB0501 EB1C/VX2739/STAND BASE ASSY  1 
1414-03LN000 W.H CABLE 10P TO 10P,L:200mm  1 
1414-03KT000 W.H CABLE 8P TO 4P TO 4P A  1 
1412-00VH000 FFC CABLE 30P,P:1.0mm,L:220mm 
04A4-00JE000 SPEAKER 2W 300/600MM VX2739 A  1 
1414-03KR000 W.H CABLE 5P TO 5P,L:800mm A  1 
1414-03KS000 W.H CABLE 4P TO 4P,L:850mm A  2 
1414-03L8000  W.H CABLE 2P TO 2P,L:120mm A  1
 B-ZN #2  4
 B-ZN #2  1
 W-NI #2  4
 W-NI #2  4
 W-NI  1
 W-NI  1
1
Page 80
16
Item ViewSonic P/N  Ref. P/N  Description  Q'ty
1  P-00010256
1505-016Q000  EPS CUSHION VX2739WM (TL)  1
2  P-00010257
1505-016P000  EPS CUSHION VX2739WM (TR)  1
3  P-00010258
1505-016S000  EPS CUSHION VX2739WM (BL)  1
4  P-00010259
1505-016R000  EPS CUSHION VX2739WM (BR)  1
5  NA
1516-00VM000  PE BAG STAND VX2739WM
10  NA
1522-01M0000  FLYER SERVICE ML VX2439WM R1.0  1
11  NA
1522-01M4000  BASE INSTALLATION ENG VX2439WM  1
13  NA
1516-00VN000  PET COVER VX2739WM  1
16  NA
1517-000Q000  ZIP BAG FOR VIEWSONIC  1
17  NA
1506-0C1Q000  INSTALATION QUIDE ENG VX2439WM  1
18  DC-00010334
1509-02GW000  CD ML VX2739WM  1
21  CB-00009408
1417-003E000  AUDIO CBL 3.5 STEREO PLUG BOTH  1
22  A-00008737
1411-00EX000  AC POWER CORD UL/CSA/3P/3C  1
23  CB-00009409
1401-00DB000  VGA CABLE HDB(M) TO HDB(M) 15P  1
24  CB-00009410
1401-00DE000  DVI(M) TO DVI(M) 18+1P L:1.8M  1
25  CB-00009411
1401-00DC000  USB CABLE A/M TO B/M L:1.8M  1
26  P-00010261
1524-02KH000  PAPER CUSHION VX2739  1
27  DC-00010333
1506-0CYT000  QSG ML VX2739WM VSI/VSE/VSA  1
29  P-00010255
1503-02G8000  CARTON VX2739WM  1
30  NA
1516-011B000  EPE BAG VX2739WM  1
31  P-00010260
1524-02FT000  CABLE CUSHION VX2439WM  1
PACKING PART LIST (VX2439wm-1/VX2439wm-CN)
ViewSonic Model Number: VS12841
CONFIDENTIAL – DO NOT COPY
2
8
12
10
7
1
6
11
13
 18
9
5
17
4
14
15
21
3
 19
OR PLAYPENS. THIS BAG IS NOT A TOY.
DO NOT USE IN CRIBS, BEDS, CARRIAGES, 
KEEP AWAY FROM BABIES AND CHILDREN.
TO AVOID DANGER OF SUFFOCATION.
H
2
 20
Page 81
11. Recommended Spare Parts List  
Serial No. Prefix: RKD (VX2739wm-1) / RRG (VX2739wm-CN) 
Item  Category  Part Name   Description  ECR/ECN ViewSonic P/N  Ref. P/N  Ref. NO Compatibility  Location Universal number# Remark
1  Power Cord   AC POWER CORD UL/CSA/3P/3C
A-00008737
1411-00EX000  Main Source 
2  Audio Cable   AUDIO CBL 3.5 STEREO PLUG BOTH
CB-00009408
1417-003E000  Main Source 
3  Signal Cable  VGA CABLE HDB(M) TO HDB(M) 15P  
CB-00009409
1401-00DB000  Main Source 
4  Signal Cable  DVI(M) TO DVI(M) 18+1P L:1.8M  
CB-00009410
1401-00DE000  Main Source 
5  USB Cable   USB CABLE A/M TO B/M L:1.8M
CB-00009411
1401-00DC000  Main Source 
6  Main Board  VX2739WM/MAIN BD./VIEWSONIC  
B-00010281
69EB3HM10A01P  Main Source 
7  Power Board   POWER SUPPLY 68W(LIPS)
B-00010282
04A5-009F000  Main Source 
VX2439WM/KEYPAD BD./VIEWSONIC
B-00010283
69EB3GK10A01P  Main Source 
9  USB Board   VX2739WM/USB BD/VIEWSONIC
B-00010284
69EB3HJ10A01P  Main Source 
10  LED Board   VX2439WM/LED BD./VIEWSONIC
B-00010285
69EB3GE10A01P  Main Source 
11  IO Board   VX2739WM/EU/IO BD./VIEWSONIC
B-00010286
69EB3HB10A01P  Main Source 
12  Front Bezel   EB1C/VX2739/FRONT COVER ASSY
C-00010200
13EB-1CB0101  Main Source 
13  Back Cover   EB1C/VX2739/REAR COVER ASSY
C-00010201
13EB-1CB0201  Main Source 
14  Base Assembly   EB1C/VX2739/STAND BASE ASSY
C-00010202
13EB-1CB0501  Main Source 
15  Flat Cable   FFC CABLE 30P,P:1.0mm,L:195mm
CB-00009412
1412-00VH000  Main Source 
16  Cable   W.H CABLE 8P TO 4P TO 4P
CB-00009413
1414-03KT000  Main Source 
17  Cable   W.H CABLE 5P TO 5P,L:800mm
CB-00009414
1414-03KR000  Main Source 
18  Cable   W.H CABLE 4P TO 4P,L:770mm
CB-00009415
1414-03KS000  Main Source 
19  Cable   W.H CABLE 2P TO 2P,L:100mm
CB-00009416
1414-03L8000  Main Source 
20  Cable   W.H CABLE 10P TO 10P,L:180mm
CB-00009417
1414-03LN000  Main Source 
21  Qucik Start Guide (QSG)  QSG ML VX2739WM VSI/VSE/VSA
DC-00010333
1506-0CYT000  Main Source 
22  User's Guide (CD ROM)  CD ML VX2739WM
DC-00010334
1509-02GW000  Main Source 
23  Label / Sticker   UPC LABEL VX2739WM R1.0
DC-00010335
1510-0E9P000  Main Source 
24  Label / Sticker   SERIAL LABEL VIEWSONIC
DC-00010336
1510-0E9N000  Main Source 
25  Label / Sticker   RATING LABEL VX2739WM
DC-00010337
1510-0GYM000  Main Source 
26  Label / Sticker   POP STICKER VX2739WM
DC-00010338
1510-0EPM000  Main Source 
27  Panel   LCD TFT 27.0' FULL HD
E-00010096
1823-00SL000  Main Source 
28  Speaker   SPEAKER 2W 300/600MM VX2739
E-00010097
04A4-00JE000  Main Source 
29  Hinge   EB1C VX2739 HINGE
HW-00009267
13EB-1CN0101  Main Source 
30  Shielding Cover   EB1C/VX2739/SHIELDING ASSY
HW-00009268
13EB-1CB0301  Main Source 
31  Screw   SCREW M3*6.0 (X) W-NI #2
HW-00009269
131A-007U000  Main Source 
32  Screw   SCREW M3*4+6L (X) W-NI #2
HW-00009270
131A-00JG000  Main Source 
33  Screw   SCREW M4*6L (W) W-NI
HW-00009271
131A-007G000  Main Source 
34  Screw   SCREW M4*10(B) B-ZN #2
HW-00009272
131C-000R000  Main Source 
35  Screw   SCREW M3*8L (X) W-NI
HW-00009273
131C-006C000  Main Source 
36  Screw   EB1C SCREW M4*10L (F) B-ZN #2
HW-00009274
13EB-1CU0101  Main Source 
37  Screw   STAND OFF #4-40*7+5 W-NI
HW-00009275
1302-00EW000  Main Source 
Rubber Foot  B05 RUBBER FOOT D=20.6  M-00008598  13EB-03U0301   Main Source
39  Carton   CARTON VX2739WM  P-00010255  1503-02G8000  Main Source 
40  Cushion   EPS CUSHION VX2739WM (TL)  P-00010256  1505-016Q000  Main Source 
41  Cushion   EPS CUSHION VX2739WM (TR)  P-00010257  1505-016P000  Main Source 
42  Cushion   EPS CUSHION VX2739WM (BL)  P-00010258  1505-016S000  Main Source 
43  Cushion   EPS CUSHION VX2739WM (BR)  P-00010259  1505-016R000  Main Source 
44  Cushion   CABLE CUSHION VX2439WM  P-00010260  1524-02FT000  Main Source 
45  Cushion   PAPER CUSHION VX2739  P-00010261  1524-02KH000  Main Source 
46  Cushion   PAPER CUSHION VG2739WM  P-00010262  1524-02DS000  Main Source 
47  Button   EB1C VX2739 FUNCTION KEY
PL-00008859
13EB-1CQ0101  Main Source 
48  Pedestal   EB1C/VX2739/STAND NECK ASSY
PL-00008860
13EB-1CB0401  Main Source 
5. Parts relationship (Main/Second source or 1/2/3/4) should be added in the "Compatibility" column
Plastics: [Pedestal, 
stand/neck, Plate,
6. If any part for certain product isn't listed in the form, supplier/PE can add it themselves and keep the part name unified.
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
1. For some special parts, some photos for identification purpose may be asked by request
3. All internal cables/wires should be put in the "Cables" category
4. All external cables should be put in the "Accessories" category
RECOMMENDED SPARE PARTS LIST (VX2739wm-1/VX2739wm-CN)
CONFIDENTIAL – DO NOT COPY
ViewSonic Model Number: VS12843 
Accessories: [Adapter, 
Battery, Remote 
Controller, Power Cord, 
External Cables, Mouse,
[All boards or PCBA]
Cabinets: [Front Bezel, 
All Covers, Base/Stand
Cables: [All internal  
Cables/wires]
Documentation: [Quick 
Start Guide, CD Rom, 
Label/Sticker]
Electronic Components:
Hardware: [Screw, 
Bracket, Hinge]
Packing Material:
[Carton, Box, Foam, 
Bags]
Above listed items are examples, supplier can expand the rows to add more necessary items.
2. For all internal cables, there must be some wordings on the "Description" column about where the cable is used (connecting to which two parts)
Page 82
 BOM LIST (VX2739wm-1/VX2739wm-CN)
CONFIDENTIAL – DO NOT COPY
ViewSonic Model Number: VS12843 
Rev: 1a
Item ViewSonic P/N Ref. P/N  Description  Location Universal number# Q'ty Unit
1 
2 
3 
4 
5 
6 
7 
8
9 
10 
11 
12 
13 
14 
15  C-00010200 
16 
17 
18 
19 
20  C-00010201 
21 
22 
23  PL-00008859 
24  HW-00009268 
25 
26 
27  HW-00009267 
28  PL-00008860 
29 
30 
31  HW-00009269 
32  HW-00009270 
33  HW-00009271 
34  HW-00009272 
35  HW-00009275 
36 
37  HW-00009273 
38  C-00010202 
39 
40  M-00008598 
41 
42  HW-00009274 
43 
44 
45 
46 
47 
48 
49  P-00010256 
50  P-00010257 
51  P-00010258 
52 
53  DC-00010335
A 
A 
A 
A 
A 
A 
A 
A 
A 
A 
A 
A 
A 
A
A 
A 
A 
A
A 
A
A 
A
A 
A
A
A
A
A 
A 
A 
A 
A 
A
A
 69EB3GE10A01P VX2439WM/LED BD./VIEWSONIC  1 
 69EB3HB10A01P VX2739WM/EU/IO BD./VIEWSONIC  1 
 69EB3HM10A01P VX2739WM/MAIN BD./VIEWSONIC  1 
 69EB3HJ10A01P VX2739WM/USB BD/VIEWSONIC  1 
 69EB3GK10A01P VX2439WM/KEYPAD BD./VIEWSONIC  1 
 1414-03KT000  W.H CABLE 8P TO 4P TO 4P  1 
 1414-03KR000  W.H CABLE 5P TO 5P,L:800mm  1 
 1414-03KS000  W.H CABLE 4P TO 4P,L:770mm  2 
 1414-03L8000  W.H CABLE 2P TO 2P,L:100mm  1 
 04A5-009F000  POWER SUPPLY 68W 
 1414-03LN000  W.H CABLE 10P TO 10P,L:180mm  1 
 1412-00VH000  FFC CABLE 30P,P:1.0mm,L:195mm  1 
 04A4-00JE000  SPEAKER 2W 300/600MM VX2739  1 
 1823-00SL000  LCD TFT 27.0' FULL HD  1 
13EB-1CB0101  EB1C/VX2739/FRONT COVER ASSY  1 
13EB-1CQ0201  EB1C VX2739 FRONT COVER  1 
13EB-1CN0301  EB1C/VX2739/LOGO PLATE  1 
13EB-1CQ0501  EB1C VX2739 POWER KEY DECOR  1 
13EB-1CQ0301  EB1C VX2739 POWER KEY  1 
13EB-1CB0201  EB1C/VX2739/REAR COVER ASSY  1 
13EB-1CQ0701  EB1C VX2739 REAR COVER  1 
13EB-1BN0201  EB1B VX2439 KENSINGTON LOCK  1 
13EB-1CQ0101  EB1C VX2739 FUNCTION KEY  1 
13EB-1CB0301  EB1C/VX2739/SHIELDING ASSY  1 
13EB-1CN0401  EB1C VX2739 SHIELDING  1 
13EB-1CN0201  EB1C/VX2739/HINGE BKT  1 
13EB-1CN0101  EB1C VX2739 HINGE  1 
13EB-1CB0401  EB1C/VX2739/STAND NECK ASSY  1 
13EB-1CQ0601  EB1C VX2739 STAND NECK  1 
13EB-1CQ0801  EB1C VX2739 NECK RING  1 
131A-007U000  SCREW M3*6.0 
131A-00JG000  SCREW M3*4+6L 
131A-007G000  SCREW M4*6L 
131C-000R000  SCREW M4*10 
1302-00EW000  STAND OFF #4-40*7+5 W-N 
13EB-0DU0A01  TAPE  8 
131C-006C000  SCREW M3*8L 
13EB-1CB0501  EB1C/VX2739/STAND BASE ASSY  1 
13EB-1CQ0401  EB1C VX2739 STAND BASE  1 
13EB-03U0301  B05 RUBBER FOOT D=20.6  7 
13EB-1BU0101  EB1B VX2439 HAND SCREW M4-13L  1 
13EB-1CU0101  EB1C SCREW M4*10L 
13EB-0LU0301  EB0L GASKET W10*H2*L44  1 
13EB-09U0E01  EB09 EU AL TPAE 30x60MM  2 
13EB-09U0101  EB09 TAPE30*30MM/HANNSATR 25  5 
13EB-13N0401  EB13 32 GROUNDING SPRING 28MM  1 
13N0-00U0I01  A2K-7J GASKET TAPE FOR VGA BRK  2 
13EB-1CU0201  EB1C VX2739GASKT L175*W12*H1.0  4 
1505-016Q000  EPS CUSHION VX2739WM 
1505-016P000  EPS CUSHION VX2739WM 
1505-016S000  EPS CUSHION VX2739WM 
1516-00VM000  PE BAG STAND VX2739WM  1 
1510-0E9P000  UPC LABEL VX2739WM R1.0  1
LIPS
 W-NI #2  10
 W-NI #2  4
 W-NI  1
 B-ZN #2  4
 W-NI  4
 B-ZN #2  4
1
4
1 
1 
1
Page 83
Item ViewSonic P/N Ref. P/N  Description  Location Universal number# Q'ty Unit
CONFIDENTIAL – DO NOT COPY
54  DC-00010336 
55 
56  DC-00010338 
57 
58 
59 
60 
61 
62  P-00010262 
63  P-00010259 
64 
65 
66  DC-00010334 
67 
68 
69  CB-00009408 
70  A-00008737 
71  CB-00009409 
72  CB-00009410 
73  CB-00009411 
74  P-00010261 
75  DC-00010333 
76  DC-00010337 
77  P-00010255 
78 
79  P-00010260
A
A 
A 
A 
A 
A
A 
A
A 
A
A
1510-0E9N000  SERIAL LABEL VIEWSONIC  1 
1510-0E9K000  HI-POT PASS LABEL VX2439WM  1 
1510-0EPM000  POP STICKER VX2739WM  1 
1537-0016000  PALLET /US  1 
1522-01M0000  FLYER SERVICE ML VX2439WM R1.0  1 
1522-01M4000  BASE INSTALLATION ENG  1 
1524-00L9000  LAYER PAD FOR TM722G  1 
1516-00VN000  PET COVER VX2739WM  1 
1524-02DS000  PAPER CUSHION VG2739WM  1 
1505-016R000  EPS CUSHION VX2739WM 
1517-000Q000  ZIP BAG FOR VIEWSONIC  1 
1506-0C1Q000  INSTALATION QUIDE EN 
1509-02GW000  CD ML VX2739WM  1 
1534-005C000  CORNER PAD FOR P5M2-M-C XBN S  1 
1524-00V5000  CORNER PAD FOR INFINITY  1 
1417-003E000  AUDIO CBL 3.5 STEREO PLUG BOTH  1 
1411-00EX000  AC POWER CORD UL/CSA/3P/3C  1 
1401-00DB000  VGA CABLE HDB 
1401-00DE000  DVI 
1401-00DC000  USB CABLE A/M TO B/M L:1.8M  1 
1524-02KH000  PAPER CUSHION VX2739  1 
1506-0CYT000  QSG ML VX2739WM VSI/VSE/VSA  1 
1510-0GYM000  RATING LABEL VX2739WM  1 
1503-02G8000  CARTON VX2739WM  1 
1516-011B000  EPE BAG VX2739WM  1 
1524-02FT000  CABLE CUSHION VX2439WM  1
 TO DVI(M) 18+1P L:1.8M  1
 TO HDB(M) 15P  1
1
1
Page 84
* Reader’s Response* 
CONFIDENTIAL – DO NOT COPY
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. Block Diagrams 
8. Schematic Diagrams 
9.PCB Layout Diagrams 
10. Exploded Diagram and Exploded Parts List 
11. Recommended Spare Parts List 
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?  
Name: 
Reader’s basic dada:
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)