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Recognition Fail Case1:
CD-ROM Fail.
LD Check.
OK
Does Focus Servo
operate normally?
OK
Does Tracking Servo
operate normally?
OK
Check
Pickup RF signal(TL313-315,317)
was 200~800mVpp?
NG
1)Check Soldering of PG301.
2) Check voltage of TL311(5V).
3) Check voltage of TL320(2.5V).
4) Check voltage of TL332(2.1)
5) Check insertion or damage of
Main FPC.
OK
Replace Unit Mecha and execute
LD calibration.
Recognition Fail Case1:
Blank CD-R/RW Fail.
Is there WBL(TL117) signal?
NG
Replace IC101
NG
Go to "LD Control is abnormal".
NG
Go to "Focus Servo is unstable".
NG
Go to "Tracking Servo is unstable".
OK
Is there
WBLI(IC201B14) signal?
OK
Replace IC201.
57
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