Harman Kardon CDR30 Service Manual page 28

CDR30
Spindle control is abnormal 2
(CD-ROM Disc)
Is there
RRF signal input?
(IC103 pin 3)
YES
Is there
RFDC signal input?
(IC108 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? (IC301 pin 132)
YES
Is there DMO signal
output? (IC301 pin 2)
YES
Go to "Spindle operating is
abnormal"
NO
Go to "RF output is abnormal"
NO
Replace the IC103(EL2245).
NO
Go to "Track servo is unstable"
NO
Is there ATFM signal
output? (IC108 pin 25)
YES
Replace the IC108(CXA2551R).
NO
Replace the IC301(OTI-9790).
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harman/kardon
NO
Go to "RF output is abnormal"