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Is FG signal normal?
TL352
1) Check
soldering PG101.
2) Check insertion and damage
of Main FPC.
LED doesn’t blink.
OK
Is SPD signal normal?
TL346
OK
Check LPF, capacitor R226.
R227,C216
OK
Replace Unit Mecha and Execute
LD Calibration.
Replace Unit Mecha and Execute
LD Calibration.
NG
NG
OK
OK
NO
YES
CD-R, CD-RW?
Is WBL signal normal?
TL117.
NG
Is SCFCLK signal normal?
IC101 (77).
NG
OK
Check HPF C214, R233.
Check soldering of
C132-C136, C144.
NG
Check IC201(B15).
NG
Check soldering of IC201.
OK
Replace IC201.
Replace IC101.
OK
Check soldering of IC101.
OK