Casio SF-8350 Service Manual & Parts List page 32

Repair section 2 : For no display or wrong display problem
START
Pin 30 of µPD65005G-452-22 "H" ?
Yes
Pin 31 of SC371015FU "H"?
Yes
LCD drive voltages OK?
(Pin8~12)
Yes
Poor connection or cut of heat seal cable ?
No
Poor connection on LCD driver ?
No
Poor connection or cut of heat seal cable for LCD ?
No
LCD cracked ?
No
Repair section 3 : For memory problem
START
Poor connection on RAM chips ?
No
Poor connection on CPU ?
No
Replace RAM chips or CPU.
No
Poor connection?
No
No
Poor connection?
Poor connection on chip
resistors R8~R10 ?
Poor connection on chip
capacitor C7~C8 ?
Chip capacitor OK ?
Chip resistor OK?
Replace SC371015FU.
Yes
Yes
Yes
Yes
Yes
Yes
— 31 —
Yes
Solder line
No
Replace parts.
Solder line
Yes
No
Yes
No
Yes
Solder line
No
No
Yes
No
Replace parts.
Yes
Replace heat seal.
Solder line
Replace heat seal.
Replace LCD.
Repleace Display PCB ass'y.
Solder line
1
1
1
1
1
1
1
1
1