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5. Adapter/Inverter Board
No power
Check CN902 Pin3~7 = 24 V
OK
Check Interface board
Check AC line volt 120V or 220V
Check F901,NR901,power cable
Check the voltage of C914 (+)
Check bridge retified circuit
Check start voltage for the Pin6 of IC903
Change IC903,IC951,ZD901,Q903,Q904,PS_ON
OK
Check T901,T902,IC901,IC902,Q901,Q902
OK
NG
No power
NG
NG
OK
Repearing the start voltage
Check D953, IC955,IC954,C964,C965,C966,IC950,IC953,ZD950,Q950
ReplaceT901,T902,IC901,IC902,Q901,Q902
Check OLP circuit
NG
OK
NG