ViewSonic Va703b3 Service Manual

							
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ViewSonic Corporation
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(2). Select “Connect”, auto connect for ISP. 
 
(3). Select “Run”, start ISP. 
 
(4). When the picture show  “Verify OK”, ISP finished.  
						

							
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After repair, to ensure the qualit y you should do the following test and 
adjustment 
 
Item Content Equipment 
Test OSD function  1.Signal is set as 1280x1024@60Hz   
2. LCM button are from left to right, checking whether each single 
function key and compound function key can be worked.  Chroma 
Signal Generator 
Contrast Check 1. Set input mode to 1280x1024@60Hz 
2. Set Pattern to 32 gray shades 
3. Set contrast to the max. The brightest 6~8 shades brightness cannot 
be distinguished.  Chroma 
Signal Generator 
Color Temperature 1. Do “Auto color” at 640 x 480@60Hz, 5-Mosic pattern 
2. Measure color temperature, check it complies with the following 
temperature: 
        5400K x=0.335 +/- 0.02, y=0.350 +/- 0.02  6500K x=0.313 +/- 0.02, y=0.329 +/- 0.02 
9300K x=0.283 +/- 0.02, y=0.298 +/- 0.02  Chroma Signal 
Generator and color 
analyzer 
Modes switching 
check  1. Use Chroma Pattern Generator to make sequence.   
VESA (640x480 800x6 00 1024x768 1280x1024 ), MAC 832x624 
DOS (640x350 720x400), the detail supported modes and power 
saving signal. 
2. Confirm the above timing modes must be full screen and the  picture must be normal. 
3. LED is Orange at power saving mode.  Chroma Signal 
Generator 
Y measurement at 
default setting 
1. Set brightness to default value 100 and contrast to default value 
70 at 6500K 
2. At full white patter, Measure Y, which should be  ≥ 250cd/m²   Chroma Signal 
Generator and Color 
Analyzer 
Panel Flicker 
check  1. Mode: 1280x1024@60Hz 
2. Set Brightness& contrast to default value 
3. Do “Auto Image Adjust” 
4. Shut down PC to check whether there’s glitter on the center of the 
picture.  Equipment::            
Chroma Signal 
Generator & PC 
Power saving 1. Mode: 1280x1024@75Hz 
2.  Pattern: full white 
3. Brightness: Max. 
4. Contrast: Default  
5.  Check power consumption at each modes 
State  Power Consumption LED color 
Normal  ≤ 35W Green 
Stand By 
< 2W  Orange 
Power Key Off ＜1
Ｗ 
No   Chroma signal 
generator and Power 
meter 
AC input: 230V/50Hz 
  
						

							
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Disassembly Block 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
PCBA PWR& Inv/B*1 
Cable Power&I/F *1 
(SCREW PW,M3*5,Ni)*3   
SCREW ,Spr/Washer,M3*6,Zn*1
Keypad*1 
Keypad Cable*1 
 ASSY PANEL*1  
TAPE,ACE(PC=10x45mm)*1 
SPEAKER*1  
 
Chassis*1 
INNOLUX Panel*1 
(SCREW  PW,M3*5,Ni)*4  
Mylar,
 22x20x12X0.3mm*1 
 
SCREW,P,M4*6,Black*4 
SCREW,P,M4*8,Zn*2 
HIGNE COVER*1 
ASSY STAND*1 
Assy  Bezel*1 
ASSY BASE*1 
 
 
 
ASSY BASE*1 
VA703m/b-3 
LCD Monitor 
PLANE BASE*1 
Rubber Foot*6 
BASE COVER*1 
Gasket*1 
SCREW  T,T4*6,Zn*2 
 
Stand*1 
Spring Sheet*1, 
SCREW,P,M4*10 *3 
Hinge *1 
 
Back Cover*1 
SCREW, P,T3*8, Zn*1 
RUBBER,COVER,*4 
ASSY STAND*1 
IF Board*1 
Lvds Cable*1 
(SCREW  PW,M3*5,Ni)*1 
(BOLT,#4-40*11.8,Ni)*2 
 
Assy  Bezel*1 
Bezel*1 
Button*1, 
THREE BIRD Logo*1 
Viewsonic Logo *1 
  
						

							
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ViewSonic Corporation
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Assembly Block 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 

 
PCBA PWR& Inv/B*1 
Cable Power&I/F *1 
(SCREW PW,M3*5,Ni)*3   
SCREW ,Spr/Washer,M3*6,Zn*1  
 
Keypad*1 
Keypad Cable*1   
ASSY PANEL*1  
TAPE,ACE(PC=10x45mm)*1 
SPEAKER*1  
 
 
Chassis*1 
INNOLUX Panel*1 
(SCREW  PW,M3*5,Ni)*4 
Mylar,
 22x20x12X0.3mm*1 
 
SCREW,P,M4*6,Black*4 
SCREW,P,M4*8,Zn*2 
HIGNE COVER*1 
ASSY STAND*1 
Assy  Bezel*1 
ASSY BASE*1 
 
ASSY BASE*1 
VA703m/b-3 
LCD Monitor 
PLANE BASE*1 
Rubber Foot*6 
BASE COVER*1 
Gasket*1 
SCREW  T,T4*6,Zn*2  
 
Stand*1 
Spring Sheet*1, 
SCREW,P,M4*10 *3 
Hinge *1 
 
Back Cover*1 
SCREW, P,T3*8, Zn*1 
RUBBER,COVER,*4 
ASSY STAND*1 
IF Board*1 
Lvds Cable*1 
(SCREW  PW,M3*5,Ni)*1 
(BOLT,#4-40*11.8,Ni)*2 
 
Assy  Bezel*1 
Bezel*1 
Button*1, 
THREE BIRD Logo*1 
Viewsonic Logo *1 
  
						

							
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5.  Packing for Shipping  and Disassembly Procedure 
5.1 Packing for Shipping 
5.1.1 Packing Procedure 
z   Paste protection film to protect the monitor. (Figure 1) 
z   Put the monitor in the PE bag and se al the bag with tape. (Figure 2) 
                         ZZZ 
Figure 1                            Figure 2 
z   Disassemble the base by pushing the button.(Figure 3) 
z   Put the cushions on the monitor. (Figure 4) 
z   Place the base into the hole of cushions. (Figure 5) 
z   Place the monitor into the carton and then put a ll the accessories into the carton. At last, close 
the carton. (Figure 6). 
         
              Figure 3                              Figure 4 
 
         
           Figure 5                               Figure 6               
 
    
  
						

							
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ViewSonic Corporation
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5.2 Disassembly Procedure 
           
 
 
 
 
           
 
 
 
 
 
          
 
 
  
						

							
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ViewSonic Corporation
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ViewSonic Corporation
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ViewSonic Corporation
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ViewSonic Corporation
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6. Troubleshooting Flow Chart 
 
   
1. Common Acknowledge
 
z   If you change the interface board, be sure that  the U103, U105, U106 and U108 these three 
components also changed to the new I/F board becaus e there was program inside. If not, please 
re-write EDID and upload firmwar e into U106 via VGA Cable. 
z   If you adjust clock and phase, please do it at the condition of Windows shut down pattern. 
z   If you confirm the R.G.B. color is normal or  not, please do it under 16-grey scalar pattern.   
z   This LCM is analog interface. So  if the entire screen is an abnormal color  that means the problem 
happen in the analog circuit part, if only some scale appears abnormal color that stand the 
problem happen in the digital circuit part.   
z   If you check the H/V position, please use the crosshatch pattern. 
z   This LCM support more than 30 timing modes, if the  input timing mode is out of specification, the 
picture may appears abnormally. 
z   If brightness uneven, repairs Invert er circuit or change a new panel. 
z   If you find the vertical line or horizontal lin e lost on the screen, please change panel. 
z   If you find the speaker don’t working, please don’ t plug in audio cable, unless change new speaker. 
(For VA703m only)