Dixon P19W, Service Manual

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19" LCD Color Monitor Dixon P19W
34
8.2.2 Power Board
1) No power
Check bridge rectified circuit and F901 circut
1) Check IC901
2) Check R909/D901/C908 and OVP circuit
Check CN902 pin4, 5 = 12V
Check the voltage of C905(+)
Check start voltage for the pin8 of IC901
Check R904, R932, R933, and Change IC901
NG
Check the auxiliary voltage is bigger than
10V and smaller than 20V
NG
NG
NG
Check Q902/D906/IC903/ZD921/ZD922/D903/D907
Check IC901 pin6 PWM wave
Check IC901,Q901
NG
OK
NG
OK
OK
OK
OK
Check AC line volt 110V or 220V
Check AC input