Casio AP-21 Manuel d'utilisateur télécharger pdf (Page 14)

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Does the power indicator

light up?

Check the main volume.

Is it OK?

Does the demo tune sound?

Replace keyboard PCBs.

Disconnect JA and JB

connectors on the main PCB.

Follow "No power"

troubleshooting.

No

Yes

Yes

Yes

No

No

Replace main volume.

Press Demo button.

Replace the main PCB.

2. No sound

3. Distorted sound

Check the voltage selector.

Is it at proper position?

No

Yes

Replace the main PCB.

Set the voltage selector at

proper position.

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