Casio Celviano AP-40, Service Manual

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TROUBLESHOOTING
1. No power
Check fuse F101.
Is F101 blown up?
Check fuses F402, F403, and F404.
Are the fuses blown up?
Are the voltages 40 V AC
and 8 V AC?
Is it OK?
Is it OK?
Measure output voltages of
the transformer.
Replace the transformer.
No
No
Replace F402, F403, and F404.
Yes
Yes
No
No
Yes
Yes
Yes
Replace main PCB. No
Replace the power switch.
Set the voltage selector at
proper position.
Check position of voltage
selector.
Check the power switch.
Replace F401.