Casio SF-4300A Manual de usuario descargar pdf (Pagina 17)

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Is 17-Pin of µPD3056G -007(LSI 1)

0[V]?

Replace IC1

N

Is 18-Pin of µPD3056G-007 (LSI 1)

0[V]?

N

Replace TC4S69F (IC2)

Y

Replace IC4

N

Y

Y

N

Y

Does key make positive contact with

L571-1 Ass’y

Y

Replace C12, C13

N

Clean/Adjust contact

<No key input>

Is 3-Pin of S-81250HG-RD (IC4) 5[V]?

Refer to <No/Erratic display>

1

Are capacitor C12, C13 OK?

Replace µPD 3056G-007 (LSI1)

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