22’’ LCD TV AOC L22W631
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5. Repair Flow Chart
1. No Power (No LED indicator)
Check CN902 Pin 1/2 = 12V
Check AC line volt 110V or 220V
Check the voltage of C905 (+)
Check bridge rectified circuit and F901 circuit
Check start voltage for the pin 8 of IC901
Check R904, R932, R933 or Change IC901
Check the auxiliary voltage is bigger than
10V and smaller than 20V
1) Check IC901, T901
2) Check C908, D902 circuit
Check
D904/D906/Q903/ZD920/IC903/IC902
Check IC901 pin 6 PWM wave
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