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AOC E941va Service Manual

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Page 41

Service Manual                                                                             AOCe941series 
41  No picture (LED orange) 
 Whitescreen 
 
Check flow chart 
for the no signal No picture 
Check signal wire 
Check U404 Vout=3.3V; 
Q409-out=1.8V
 
Replace signal wire 
check X401 waveform 
replaceU404,Q409,Q410,Q405
&around device 
replace X401 
Check CN101-RGB/HS/VS 
Check U402/U403 out 
Check Correspondent 
component
 
OK NG
NG
NG
NG OK 
OK 
OK 
Replace U401 
Updata soft data OK
NG
Check...

Page 42

Service Manual                                                                             AOCe941series 
42 
Check flow chart   
For the no power Check CN901 
100-240V? 
Check rectified voltage-C907 
Check AC  supply 
checkFuseF901/ rectified device 
L902/BD901/C901/C902 
Check voltage of IC901-8pin
checkcomponent R904/R932 
Check T901(1-3)out-Vcc 
Check D901/R909/C903 
Check IC901-drive out 
Check MOS-Q901pin(G/D) 
Check/replace IC901 
Check R910/R938/Q901/T901pri 
Around component 
Check T901sub...

Page 43

Service Manual                                                                             AOCe941series 
43 
No Backlight of panel 
 
 
Check flow chart for the 
Inverter No Backlight 
After Power off,check 
C801/C802?Q824? 
Check ON/OFFsignal 
Check voltage of F801-12V? 
Open F801, voltage-12V 
Return check Power
Check main board 
After Power off,check 
Q805/Q808/R804/C825 
Check IC801-6pin RT waveform? 
Check aroud component 
Re
place IC801
Check IC801-out9/10pin-? 
Check Q802 waveform? 
Check T801...

Page 44

Service Manual                                                                             AOCe941series 
44 
Key Board---OSD no working 
 
 
 
9.3  Factory mode adjustment 
   After replacing the Main board and the Panel, Check for enter the Factory mode ,then re-writing DDC is necessary. 
Ste p:  
Press MENU button
  and hold,reinsert the Power cord , then ,press MENU , the monitor will may enter Factory OSD 
Menu. Then  Press 
 . Factory OSD Menu will appear  in the screen. 
 
Check flow chart 
For...

Page 45

Service Manual                                                                             AOCe941series 
45    By select    this “F” button to enter Factory OSD Menu. 
  
9.4  Writing DDC program step 
After replacing the Main board and the Panel, Check if white-balance is within the specs ,then re-writing DDC is 
necessary. 
1. Prepared the PC with Windows XP system, DDC recording device (12V)for figure below 
2. Connect the DDC recording device and the PC through PC parallel port 
3. setup...

Page 46

Service Manual                                                                             AOCe941series 
46 
 
 
 

Page 47

Service Manual                                                                             AOCe941series 
47 
 
 
 

Page 48

Service Manual                                                                             AOCe941series 
48 
10.BOM List 
Note: The parts information listed below are for reference only, and are subject to change 
without notice. Please go to http://cs.tpv.com.cn/hello1.asp
 for the latest information.  
10.1 Model:e941VA--T995NTNBWVK2PNJ 
Location Part number  Description  Remark 
  040G 581 26704  SHIPPING LABEL 
2nd source 
  040G 581689 4A  BARCODE LABEL FOR 1  3 
  052G   1211  A Conductive Tape...

Page 49

Service Manual                                                                             AOCe941series 
49  C903  065G305M1022BP  Y2 1000PF M 250VAC Y5P  1 
C902  065G305M1022BP  Y2 1000PF M 250VAC Y5P  1 
C900 065G306M3322BP  3300PF 20%  1 
C918 067G215A1024KV  EC 1000uF 25V  12.5*20mm 
2nd source 
C918  067G215A1024LV  LOW ESR EC 1000uF 25V M 12.5*20mm  1 
C925 067G215D4714KV  E.C 105℃  CAP 470UF M 25V    ED SERIES 
2nd source 
C925  067G215D4714LV  LOW ESR EC 470uF 25V M 10*16mm  1 
C921...

Page 50

Service Manual                                                                             AOCe941series 
50  IC901  056G 379160  IC FAN6752MY SOP-8  1 
R610  061G0603000 JF  RST CHIPR MAX 0R05 1/10W FENGHUA  1 
R907  061G06031001FY  RST CHIPR 1KOHM +-1% 1/10W YAGEO  1 
R918  061G06031002FY  RST CHIPR 10KOHM +-1% 1/10W YAGEO  1 
R602  061G0603103 JT  RST CHIP 10K 1/10W 5% TZAI YUAN  1 
R603  061G0603103 JT  RST CHIP 10K 1/10W 5% TZAI YUAN  1 
R604  061G0603103 JT  RST CHIP 10K 1/10W 5% TZAI YUAN  1 
R605...
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