LG CED-8081B Service Manual page 14

Spindle control is abnormal 2
(CD-ROM Disc)
Is there RRF signal input?
(IC403 pin 3, 2)
YES
Is there EFM signal output?
(IC403 pin 7)
YES
Does Tracking Servo
operate normally?
YES
Go to "Disc recognition is abnormal"
Spindle control is abnormal 3
Is there WBLIN signal input?
(IC201 pin 132)
YES
Is there DMO signal output?
(IC202 pin 2)
YES
Go to "Spindle operating is abnormal"
NO
Go to "RF output is abnormal"
NO
Replace the IC403(KM4200).
NO
Go to "Track Servo is unstable"
NO
Is there ATG signal output?
(IC401 pin 41)
YES
Replace the IC401(OTI9071).
NO
Replace the IC201(OTI-9790).
NO
Go to "RF output is abnormal"
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