ViewSonic Vx2235wm 5 Service Manual

ViewSonic Corporation Confidential - Do Not Copy    VX2235wm-1 
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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 
7. Add Cover to AD PCB Heatsink 
Step 1 : 
Place New OSD Board. 
Step 2 : 
Insert Audio cable to connectors of 
New OSD Board. 
Step 1 : 
Join the PCB Cover. 
Step 2 : 
Fasten 4 fixed screws. 
Step 3: 
Completed. 
  

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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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8. Rear Assy & Stand Assembly 
Step 10 : 
Completed. 
Step 1 : 
Place Rear Cover. 
Step 2 : 
Fasten 2 fixed screws. 
Step 3 : 
Place the Stand Assy. 
Step 8 : 
Fasten 4 fixed screws. 
Step 9 :  
Insert FFC.  

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Step 5 : 
Join the Stand Cover. 
Step 6 : 
Join the Seat Assy 
Step 7 : 
Completed. 
Step 4 : 
Fasten 4 fixed screws.  

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6. Troubleshooting Flow Chart 
 
 
 
 
Defect Mode Failure Analysis Repair Testing 
 
Flash Dots 
Bright Dot 
Dark Dot 
Backlight
 
Light Leakage 
Mura 
Image Sticking 
Brightness spot 
Particle  
Dot Defect  Check Panel 
Light On Test 
 
Next Step
※ 
“ Panel Change” Should be Performed to Level 3 Repair 
Abnormal 
Display 
TEST 
NG 
 A Completed 
Image Remain 
Group Bright 
 Dots 
Others Cosmetics 
Defect 
Panel Change  

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Defect Mode Failure Analysis Repair Testing 
Check PCBAPower on   
Display  
Abnormal  
Flicker 
Next StepTEST NG 
 A 
 
Completed 
AD/B Change 
CNT/B Change 
Inverter/B Change 
Power/B Change 
Check Panel
Display Noise 
Beat Display 
Shut Down 
Beat Display 
Flicker 
No Backlight 
Display Wave 
 B 
Panel Change 
Adapter Change Check Adapter 
※  “ Panel Change” Should be Performed to Level 3 Repair 
Check PCB A
AD/B Change 
Power/B...

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 Failure Analysis Repair Testing 
Gray Scale   
Display  
Abnormal 
R.G.B  
Display 
Abnormal  
No signal 
Display White 
Out 
Brightness 
Even 
Abnormal  
Next StepTEST NG 
 
Completed 
 B 
Booting Delay 
 C 
Beat Display 
No Backlight 
Check PCBAAD/B Change 
Inverter/B Change 
Power/B Change 
Check Panel
Check PCBA
Panel Change 
Power/B Change 
Inverter/B Change 
CNT/B Change 
AD/B Change 
Check PCBA
VGA cable 
DVI cable 
Check Wire...

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Defect Mode Failure Analysis Repair Testing 
Horizontal 
Line Defect 
Vertical 
Weak Line 
Peculiar Smell 
Check PCBA
Check Panel
Horizontal 
Weak Line   
Next StepTEST NG 
AD/B Change 
Panel Change 
Horizontal 
Band Defect 
 C 
Vertical 
Band Defect 
Power Saving 
Display  
Abnormal 
Check PCB A
AD/B Change 
Inverter/B Change 
Power/B Change 
Check PCBA
AD/B Change 
※ “ Panel Change” Should be Performed to Level 3 Repair 
Complete