ViewSonic Va1912w4 Service Manual

 
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 PCBA
AD/B Change...

 
 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...

 
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 PCBA
AD/B Change 
Inverter/B Change 
Power/B Change 
Check PCBA
AD/B Change 
※ “ Panel Change” Should be Performed to Level 3 Repair...

 
Defect Mode Failure Analysis Repair Testing 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
LED Off 
No Power 
LED Dark 
LED Abnormal 
LED Flicke
r 
Power ON/OFF  Abnormal 
LED Display  Abnormal Check PCBA 
Check Wire 
AD/B Change 
CNT/B Change 
OSD Cable 
Inverter/B 
Power/B Change 
OSD/B Change 
AC Power Change 
DC Power CNT 
Cable Chan
ge 
Adapter Change Check Adapter 
Check PCBA 
Check Wire 
OSD Cable 
Inverter/B 
Power/B Change 
OSD/B Change 
DC Power CNT Cable Chan
ge...

 
Defect Mode Failure Analysis Repair Testing 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Abnormal BIOS &OSD 
Check PCB 
Check Wire 
AD/B Change 
CNT/B Change 
OSD cable 
OSD No 
Display OSD Key   
Unavailable 
OSD Can’t 
Input 
OSD Can’t 
Read 
OSD Jiggle 
OSD Display 
Abnormal 
Check BIOS 
Inverter/B 
Power/B Change 
OSD/B Change 
D-sub cable 
VGA cable 
DVI cable 
BIOS Update 
Abnormal  
Louds
peaker 
Check PCBA 
Check Wire 
AD/B Change 
CNT/B Change 
No Voice  Voice Loss 
Abnormal...

 
Defect Mode Failure Analysis Repair Testing 
  
 
 
 
 
 
   
   
 
 
 
   
 
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
Display Shut   
Down  Check PCBA
Check Panel
Display Flicker 
((tapping )  Check PCBA 
Check Panel 
AD/B Change 
AD/B Change 
Power/B Change 
Panel Change 
CNT/B Change 
CNT/B Change 
Other Abnormal  Display 
Next StepTEST NG 
Complete
TV Function 
Display 
Abnormal 
※ “ Panel Change” Should be Performed to Level 3 Repair 
Panel Change 
Check PCBA 
Check Wire 
TV /B Change 
AV Cable...

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 pow er cords are plugged and whether there is a 
supply of power....

ViewSonic Corporation
7. Recommended Spare Parts List 
 
 Rev: 1bItemECR/ECN ViewSonic P/N Ref. P/N Location Universal number#Qty
1Accessories:
Power Code, UL, SVT#18/3C, 75C, LP-30B+LS-13, L=1830+/-
50mm, Black, Linetek, 18AWG, No Bag, Green I A-00000458
32E1818015(AJ0A2T3A25)1
2 PCBA for , A190A2-A02-T, A190A2-A02-H-S1, 1206-04, Rev.04,
ODM, Green II B-00005599 35-D005694
1
3 PCBA for , A190A2-H, A190A2-H-K3, 106-02, Rev.02, USI/ITC,
ODM, Green II B-00005600 35-D005166
1
4 Lips With Audio, DAC-12M030...

ViewSonic Model Number:  VS10866
Serial No. Prefix: QBM Rev:  1a
Item Description ECR/ECN ViewSonic P/N Ref. P/N Location Universal number# Qty
1 Accessories: Power Cord 0.75mm2, 3C, A-00002058 32E1818013 1
2 Audio Board (Rev.02) B-00005600 35-D005166 1
3 Power Supply Board, Ver:0F B-00006039 27-D003247 1
4 Main Board - A190A2-A02-T, A190A2-A02-T-S1,Rev.04 B-00006727 35-D008185 1
5 Front Panel, Bezel Assy C-00004276 40-D004254 1
6 Back Cover C-00004277 40-D004253 1
7 Cover Hinge C-00004279 40-D004258 1...

ViewSonic Model Number:   VS10866
Rev: 1b
Serial No. Prefix:   Q90
Item ViewSonic P/N Ref. P/N Description Location Universal number# Qty1 E-00005747 MJ0A10AK01 19 Wide Semi Product,A190A2,1440X900,TN 1
2 N/A 36X8636401 Driver IC,Scan,HX8636APD400(TSMC),300Channel,,RoHS,Green I 3
3 N/A L3J009XXXX 19 wide PS TN Asahi 0.7mm glass Cr BM(Panel Base) 1
4 N/A 74-D002212 Polarizer,TFT,Degree 135,414 mmx259.7 mmx0.215 mm,NWF-LESEG,M190A1,Green\
I
1
5 N/A 74-D002213 Polarizer,CF,Degree 135,415.84 mmx262.15...