LG GCC-4242N Service Manual page 51

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