Casio SF-8500, Service Manual & Parts List

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Connection of keyboard cable OK?
2
Replace parts.
Poor connection? Solder line
Replace parts.
Yes
1
Solder line
Poor connection? Solder line
No
Replace parts.
Yes
1
Poor connection? Solder line
Adjust keyboard cable.
1
Solder line
Yes
When press power on Key, any
oscillation at oscillator?
Poor connection
on oscillator?
Pin 45 of HD62076C02 "H" ?
Pin 31 of
µ
PD65005G-566-3B6 "H" ?
Pin 32 of
µ
PD65005G-566-3B6 "H"
?
Pin 31 of SC371015FU "H" ?
1
Yes
Yes
Yes
Yes
Yes
Solder line
No
Replace parts.
Yes
1
Pin 39 of
µ
PD65005G-566-3B6 "L" ?
Poor connection? Solder line
No
Replace parts.
Yes
1
Pin 3 of transistor Q1 "H" ?
Pin 1 and 32 of ROM
µ
PD23C4001EBGW-304 "+4.5V" ? Solder line 1
Pin 32 of ROM
µ
PD23C4001EBGW-304 "Pulse" ? Solder line
No
Replace CPU.
1
Poor connection on ROM, RAM or CPU ?
1
No
Solder line
Replace ROM, RAM or CPU.
Yes
Yes
Yes
Yes
No
Poor connection?
No
No
No
No
No
No
No
Yes
Yes
1
No
1
No
No
Poor connection
on ROM or CPU?
No
Yes