Harman Kardon CDR20 Service Manual page 30

CDR20
Spindle control is abnormal 2
(CD-ROM Disc)
Is there
RRF signal input?
(IC413 pin 3)
YES
Is there
RFDC signal input?
(IC401 pin 85)
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 IC413(EL2245).
NO
Go to "Track servo is unstable"
NO
Is there ATFM signal
output? (IC401 pin 25)
YES
Replace the IC401(CXA2551R).
NO
Replace the IC201(OTI-9790).
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harman/kardon
NO
Go to "RF output is abnormal"