LG GCC-4241N Service Manual page 55

Recognition Fail Case2:
DVD Disc Fail.
Is Q303 Pin6 level 3.6V or more?
OK
After Power On, does Pick up
move?
OK
Is there RF signal at PG101
Pin24(TL320)?
OK
Check
ARF waveform (IC101 Pin51) is
400~800mVpp?
OK
OK
NG
Is PG101 34pin (TL330)
level about 180mW?
Check after replacing
Pickup unit. Is it OK?
NG
Go to Focus Drive check.
NG
Check i) Soldering of PG101.
ii) insertion or damage of Main FPC.
Replace the Pickup unit.
Check i) Voltage of TL331(5V) .
NG
ii) Voltage of TL327 (2.2V)
iii) Dumping Reg RA102, RA104.
iv) Soldering of IC101.
Replace the IC101.
NG
Replace IC101.
NG
Replace IC303.
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