Casio SF-5600AR Specifications download pdf (Page 28)

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Connection of keyboard cable OK?

Replace parts.

Poor connection? Solder line

Replace parts.

Yes

Solder line

Adjust keyboard cable.

Solder line

Yes

When press power on Key, any

oscillation at oscillator?

Poor connection

on oscillator?

Pin 45 of HD62076C03 "H" ?

Pin 24 of SSC2571F0A "H" ?

Yes

Solder line

Replace parts.

Yes

Pin 28 of SSC2571F0A "L" ?

Poor connection?

Solder line

Replace parts.

Yes

Pin 3 of transistor Q3 "H" ?

Pin 1 and 32 of ROM µPD23C2001EGW-344 "+4.5V" ? Solder line

Pin22 and Pin 24 of ROM

µPD23C4001EBGW-304 "Pulse" ?

Solder line

Replace CPU.

Poor connection on ROM, RAM or CPU ?

Solder line

Replace ROM, RAM or CPU.

Yes

Poor connection?

Yes

Poor connection

on ROM or CPU?

Yes

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Casio SF-5600AR Specifications Page 28