LG GCC-4241N Service Manual page 50

LED doesn't blink.
Is FG signal normal?
TL160
OK
Is SPD signal normal?
TL162
OK
1) Check
soldering PG101.
2) Check insertion and damage
of Main FPC.
OK
Replace Unit Mecha and Execute
LD Calibration.
52
NG
Replace Unit Mecha and Execute
LD Calibration
NG
Check LPF, capacitor R249.
C250, C251
Check soldering of
C131-C136.
Check soldering of IC101.
Replace IC101.
OK
OK
OK
OK
CD-R, CD-RW?
YES
Is WBL signal normal?
TL102.
NG
Is SCFCLK signal normal?
IC101 (78).
NG
Check HPF C247, R230.
NG
Check IC201(92).
NG
Check soldering of IC201.
OK
Replace IC201.
NO
OK