Casio AP-20 Service Manual

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Check fuse F101.
Is F101 blown up?
Check fuses F2, F3, and F4.
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 F101.
Replace F2, F3, and F4.
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.
TROUBLESHOOTING
1. No power

Casio AP-20 Specifications

General

Brand	Casio
Model	AP-20
Category	Musical Instrument
Language	English