5.Power Board No power
No power
Check to CN902 Pin10,11 =14V and Pin6,7 = 5 V
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| OK | NG |
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| Check AC line volt 120V or 220V |
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| OK | Change F901, Check BD901, L901, IC901 | |||||||||
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| Check the voltage of C905(+) |
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| Check bridge retified circuit |
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| OK |
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| Check start voltage for the Pin2 of IC901 |
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| Change IC901 |
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OK
Check the auxiliary voltage is smaller than 20V
NG
Check IC901
OK
Check T901,D906, D907, Q903,ZD921,ZD922,IC904,IC903
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