ViewSonic Va703m4 Service Manual

ViewSonic Corporation 8  Confidential - Do Not Copy   VA703b-4_VA703m-4 
2-4 ELECTRICAL REQUIREMENT  
Horizontal / Vertical Frequency 
Horizontal Frequency  30 – 82 kHz   
Vertical Refresh Rate 50 – 85 Hz. 
Maximum Pixel Clock 
135 MHz 
Sync Polarity  Independent of sync polarity. 
 
Timing Table 
Item Timing  Analog 
1  640 x 350 @ 70Hz, 31.5kHz 
Ye s 
2  640 x 480 @ 50Hz, 24.68KHZ 
Ye s  
3  640 x 480 @ 60Hz, 31.5kHz Ye s 
4  MAC 640 x 480 @ 67Hz, 35.0kHz 
Ye s 
5  640 x 480 @ 72Hz, 37.9kHz 
Ye s 
6...

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Primary Presets      
1280 x 1024 @ 60Hz 
 
User Presets 
Number of User Presets (recognized timings) Ava ilable: 10 presets total in FIFO configuration 
 
Changing Modes 
●  Maximum Mode Change Blank Time for image stab ility : 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 Adjust”  
●  The monitor needs to do...

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2-6 TFT LCD PANEL 
 
1st Panel Source INNOLUX MT170EN01 V.7 
Type TN, LVDS 
Active Size  337.9mm (H) x 270.3mm (V) 
Pixel Arrangement RGB Vertical Stripe 
Pixel Pitch 0.264 mm 
Glass Treatment Anti Glare (Hard coating 3H) 
# of Backlights 4 CCFL edge-light  
Backlight Life 50,000 Hours (Typ)  
Luminance –Condition: CT = 6500 K 
Contrast = Max, Brightness = Max 
280 cd/m2 (Typ after 30 minute warm up) 
250 cd/m2 (Min after 30...

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2-7 IMAGE PERFORMANCE 
Display Size 
Horizontal Display Size, Primary Preset Full Screen 
Vertical Display Size, Primary Preset Full Screen 
 
Luminance 
Lv (Max) –Condition: 
Brightness / Contrast = 100% 
CCT = USER COLOR (R/G/B=100%) 
Lv (Max) = The Luminance requirement of  
section 4-6 “TFT LCD PANEL” 
Lv (Def) –Condition: 
Brightness / Contrast = default 
Color Temperature = 6500K 
Lv (6500K) / Lv (Max) x 100% > 85% 
Lv...

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Saturation 
Contrast = Default 
Brightness = Default 
Test pattern = 64-gray  NO VISIBLE SATURATION 
Contrast = 100% 
Brightness = 100% 
Test pattern = 64-gray 8~10 VISIBLE SATURATION 
Contrast = 100% 
Brightness = 100% 
Input signal level = 720mV 
Test pattern = 64-gray 8~10 VISIBLE SATURATION 
 
Preset Color Temperatures 
sRGB  It should meet IEC 61966-
2-1 (1999-10) standard. 
CCT (typ) = 9300K (u’CCT=0.1888; v’ CCT=0.4457)...

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2-8 MECHANICAL 
Dimension 
Dimension (Desktop) 
 
Width 379mm 
Height (Height adjust to the bottom) 400mm 
Depth 210mm 
Monitor Weight  3.6kg/7.9Ib 
*Refer to Figure 1   
Dimension (Head Only / Wall Mount)   
Width 
379mm 
Height 338mm 
Depth 68mm 
Monitor Weight  3.3kg/7.3Ib 
*Refer to Figure 1   
Ergonomics 
Tilt Up step 1  From 0º  to +20º±3° 
Tilt Down 
From 0° DOWN TO -5°±3° 
Swivel Right  N/A 
Swivel Left  N/A 
Height Adjust...

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3. FRONT PANEL CONTROLS AND INDICATORS 
Short Cuts Function from the button(s) 
[1] Main Menu 
[2] Auto Image Adjust 
[▼ ] or [ ▲]  To immediately activate Contrast
 menu. It should be change to 
Brightness OSD by push button [2] 
[ ▼ ]+ [ ▲]  Recall both of Contrast  and Brightness to default 
[1] + [2] Toggle 720x400 and 640x400 mode when input 720x400 or 640x400 
mode 
[1] + [
▼] + [ ▲]  
(keep pushing 5 sec)  White Balance...

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Main Menu Controls 
Auto Image Adjust 
Contrast/Brightness*
1 
Audio Adjust ( for VA703m-4 only ) 
Vo l u m e *3, Mute*3 
Color Adjust    sRGB, 9300K, 6500K(default), 5400 , User Color [R, G, B] 
Information   
H Frequency, V Frequency, Pixel Clock,  Resolution, Serial Number, Model Number, 
“www.ViewSonic.com
”  
Manual Image Adjust  H. Size, H/V Position
, Fine Tune, Sharpness*2 
Setup Menu    Language [English, French, German,...

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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 anal og and digital mode as below 
1. Set the factory defaults as shown in Section 4-7 
2. Clean all the mode setting buffer 
3. Execute Auto Image...

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Factory Defaults 
Item Defaults Item Defaults 
Contrast 70%  Volume  50% ( 
for VA703m-4 only ) 
Brightness 100%  Balance  N/A 
Color Temperature  6500K  Treble  N/A 
Sharpness 0%  Bass  N/A 
OSD H. Position  50%  720x400/640x400  720x400 
OSD V. Position  50%  640x480@60Hz 
720x480@60Hz 640x480@60Hz 
OSD Time Out  15 Sec 
In SOG and Composite, 
720x480@60Hz 
640x480@60Hz  N/A 
OSD Background  Enabled 
In SOG and Composite,...