Harman Kardon CDR20 Service Manual page 32

CDR20
Focus Servo is unstable
Is FE signal
output normal in Focusing
Up/Down? (IC401
pin 56)
YES
Is FAQ signal
output normal in Focusing
Up/Down? (IC201
pin 207)
Go to "Focus Actuator operating
is abnormal"
Track Servo is unstable
Is TE signal
output normal in Focusing ON
and Tracking OFF?
(IC401 pin57)
YES
Is TE signal
input normal in Focusing
ON and Tracking OFF?
(IC201 pin198)
YES
Is
there TAO signal
output in Tracking ON?
(IC201 pin 208)
YES
Check the Driver IC(IC501) and
P/U referring to "Focus Asctatr
operating is abnormal."
NO
Check the IC401(CXA2551R).
Go to "RF output is abnormal"
NO
Replace the IC201(OTI-9790).
Is PICK UP(E,F,G,H)
NO
output normal?(CN401
pin 16,7,13,10)
YES
Check the IC401(CXA2551R).
YES
Go to "RF output is abnormal"
NO
Check the IC403(NJM3403)
NO
Replace the IC201(OTI-9790).
32
harman/kardon
NO
•Check the PICK UP FFC.
•Replace the PICK UP.