HUDSON 9
44
11.2. Power/Inverter Board
(1) No power
Check CN902 Pin7 = 12V
Check AC line volt 110V or 220V
Check AC input
Check the voltage of C905 (+)
Check bridge rectified circuit and F901 circuit
Check start voltage for the pin8 of IC901
Check R904, R905 and Change IC901
NG
Check the auxiliary voltage is bigger than
11V and smaller than 25V
1) Check IC901
2) Check R909, D901 circuit
OK
OK
NG
Check Q901, D903, IC903, IC904, Q903, ZD902
OK
Check IC901 pin5 PWM wave
OK
Check IC901
NG
NG
NG
OK
NG
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