39
Meridian 1
11.2. Power/Inverter Board
(1) No power
Check ZD902 ˙12V
Check AC line volt 100V or 240V
Check AC input
Check the voltage of C907 (+)
Check bridge rectified circuit and F901 circuit
Check start voltage for the pin8 of IC901
Check R904, R932and Change IC901
NG
Check the auxiliary voltage is bigger
than 10V and smaller than 16V
1) Check IC901
2) Check R909, D901 circuit
OK
OK
NG
Check Q901, D903, IC902, IC903, D915, D916, D921, D922
OK
Check IC901 pin5 PWM wave
OK
Check IC901
NG
NG
NG
OK
NG
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