AOC L22W765, Service Manual

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22’’ LCD TV AOC L22W765
19
5. Repair Flow Chart
1. No Power (No LED indicator)
2. Can not start (LED indicator yellow)
NG
Repair the key board
OK
Check 12V SB
NG
Return to “1”
OK
Check PWR ON signal
NG
Check U905, Q906, 0907
NG
Replace U905 or Q906 or Q907
Check I
2
C communication
OK
Check RELAY-SW signal
NG
Replace Q910, Q912
Check U401
NG
Replace U401
OK
OK
Check main board power supply part
Check key board
OK
Check I
2
C communication
NG
Check power cord and board interface
Plug in power cord and interface
OK
Check F901, BD901, C905
NG
Replace F901 or BD901 or C905
OK
Check the start voltage of IC901
Check the output of IC901 pin6
NG
Check R932, R904, R933, IC901
OK
Check the voltage of IC901 PIN1
OK
Check T901, D902, R909, C908, IC903
Check D901, Q901
OK
NG
NG
Check ZD920, IC902, IC903
NG
Replace ZD903 or IC902 or IC903