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Recognition Fail Case 1:
CD-ROM Fail
Check Pickup Read Power
was 1.3 ~1.7mW?
Check the Pick-up FFC and CN101.
Replace the Pick-up.
Go to “Focus Servo is unstable”.
NO
YES
Does Focus Servo
operate normally?
Check Pickup
RF signal IC121(Pin81)
RFOUT was 2~2.5V?
NO
Go to “LD CHECK”.
YES
NO
Replace IC121.
YES
Check EQOUTP
waveform (IC121 Pin 74) was
1.75~2.3V?
NO
Go to “Tracking Servo is unstable”.
YES
YES
Check after replacing IC201.
It is OK?
NO
Recognition Fail Case2 :
Blank CD-R/RW
Is there WBL (IC201 pin39)
signal?
Check the connection between
IC201 and IC121.
Replace IC121.
Replace the IC201.
NO
YES
Is there WBL (IC121 pin63)
signal?
NO
YES
OK
Summary of Contents for GSA-4166B
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Page 39: ...43 3 MD Assy For LightScribe Optical Encoder Unit OPU ID Movement Range L 21um ...
Page 86: ...90 CD Laser Power Setup Result HC_CD Laser Power Setup Result DVD Laser Power Setup Result ...