Troubleshooting - Casio SF-8500 Service Manual & Parts List

12. TROUBLESHOOTING

Generally, check the machine with the followning steps for repair.
START
Main battries 6V?
Yes
1
Save data to P/C if necessary.
Follow repair section 2.
Follow repair section 3.
Repair section 1 : For no key input problem
START
Pin 2 of SC371015FU Approx. 4.5 V ?
Yes
Pin 26 of µPD65005G-566-3B6 "L"?
Yes
Pin 40 of µPD65005G-566-3B6 "L" ?
Yes
Pin 36 of HD62076C02 "L" ?
Yes
Pin 54 of HD62076C02 "L" ?
Yes
2
No
No
Load data from P/C if necessary.
No
No
No
No
No
— 30 —
CONDITION :
Replace main battries (CR2032 2pcs.)
(Clean and adjust battery contact.)
No
Key input OK?
Yes
Display OK?
Yes
No
Current consumption OK?
Yes
No
Data OK?
Yes
END
Yes
Poor connection?
No
Replace parts.
Yes
Poor connection?
No
Replace parts.
Yes
Poor connection?
No
Replace parts.
Yes
Poor connection?
No
Replace parts.
Yes
Poor connection?
No
Replace parts.
Main battery switch ON
Reset operation
Yes
Key input OK?
No
Follow repair section 1.
Solder line
1
Solder line
1
Solder line
1
Solder line
1
Solder line
1