Casio SF-5500B Manual de usuario descargar pdf (Pagina 16)

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N

Y

N

Y

N

Y

Is Pin 13 of LSI1 sending the signal?

N

Y

Is the soldering of LSI2 or LSI3 poor?

Y

N

Is the soldering of LSI1 poor?

N

Replace LSI1.

Y

START

Is Pin 1 of DET1 5.2 V?

Replace DET1.

Replace LSI1.

Replace LSI1.

Resolder.

Is Pin 11 of LSI1 sending the signal?

Replace LSI1, LSI2.

1

Does the rubber key contact make positive

contact with the PCB assembly?

Replace the rubber key contact.

Resolder.

No key input

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