— 30 —
Generally, check the machine with the followning steps for repair.
Main battries 6V?
Key input OK?
No
Save data to P/C if necessary.
Current consumption OK?
Follow repair section 2.
Follow repair section 3.
No
Replace main battries (CR2032 2pcs.)
Display OK?
Load data from P/C if necessary.
Yes
Yes
Yes
Data OK?
END
No
Follow repair section 1.
Main battery switch ON
(Clean and adjust battery contact.)
Reset operation
Yes
Repair section 1 : For no key input problem
Pin 2 of SC371015FU Approx. 4.5 V ?
Poor connection?
Solder line
No
Replace parts.
Yes
1
Pin 26 of
µ
PD65005G-566-3B6 "L"?
Poor connection?
Solder line
No
Replace parts.
Yes
1
Yes
No
Pin 40 of
µ
PD65005G-566-3B6 "L" ?
Poor connection?
Solder line
No
Replace parts.
Yes
1
Poor connection?
Solder line
No
Replace parts.
Yes
1
Pin 36 of HD62076C02 "L" ?
Poor connection?
Solder line
No
Replace parts.
Yes
1
Pin 54 of HD62076C02 "L" ?
Yes
Yes
Yes
Yes
2
No
Yes
No
START
1
Yes
START
No
12. TROUBLESHOOTING
Key input OK?
CONDITION :
No
No
No
No
Summary of Contents for SF-8500
Page 1: ...SF 8500 LX 575 AUG 1993 R without price INDEX...
Page 3: ...1 1 SCHEMATIC DIAGRAM 1 1 Main PCB...
Page 4: ...2 1 2 Display PCB...
Page 5: ...3 1 3 Key Matrix...
Page 34: ...33 13 PARTS LIST SF 8500...
Page 35: ...34...
Page 36: ...35 14 PCB VIEW...
Page 37: ...37 15 ASSEMBLY VIEW...
Page 38: ...8 11 10 Nishi Shinjuku Shinjuku ku Tokyo 160 Japan Telephone 03 3347 4926...
