18.5” LCD Color Monitor HCL HCMELWBT11
33
8.2.2 Power Board
No power
Check AC line volt 110V or 220V
Check AC input
Check the voltage of C907 (+)
Check bridge rectified circuit and F901 circuit
Check start voltage for the pin3 of IC901
Check R904, R932, R933, Change IC901
NG
Check the auxiliary voltage is bigger than
10V and smaller than 20V
1) Check IC901
2) Check D900, D901 circuit
OK
OK
NG
Check Q903/Q901/IC902/IC903/ZD921/ZD922
OK
Check IC901 pin8 PWM wave
OK
Check IC901
NG
OK
NG
NG
Содержание HCMELWBT11
Страница 26: ...18 5 LCD Color Monitor HCL HCMELWBT11 26 7 PCB Layout 7 1 Main Board 715G2904 2 2 ...
Страница 27: ...18 5 LCD Color Monitor HCL HCMELWBT11 27 ...
Страница 28: ...18 5 LCD Color Monitor HCL HCMELWBT11 28 7 2 Power Board 715G2852 2 ...
Страница 29: ...18 5 LCD Color Monitor HCL HCMELWBT11 29 7 3 Key Board 715G2835 1 ...
Страница 38: ...18 5 LCD Color Monitor HCL HCMELWBT11 38 10 Monitor Exploded View ...