LG CED-8081B Service Manual page 16

Focus Servo is unstable
Is FE signal
output normal in Focusing
Up/Down?
(IC401 pin 30)
YES
Is FAQ signal
output normal in Focusing
Up/Down?
(IC201 pin 207)
YES
Go to "Focus Actuator
operating is abnormal"
Track Servo is unstable
Is TE signal
output normal in Focusing
ON and Tracking OFF?
(IC401 pin 28)
YES
Is TE signal
input normal in Focusing
ON and Tracking OFF?
(IC201 pin 198)
YES
Is there TAO
signal output in Tracking ON?
(IC201 pin 208)
YES
Check the Driver IC(IC501) and
P/U referring to "Focus Actuator
operating is abnormal".
NO
Check the IC401(OTI9071).
Go to "RF output is abnormal"
NO
Replace the IC201(OTI-9790)
Is PICK UP
NO
(E, F, G, H) output normal?
(PN401 pin 16, 7, 13, 10)
YES
Check the IC401(OTI9071).
YES
Go to "RF output is abnormal"
NO
Check the IC404 (NJM3403)
NO
Replace the IC201(OTI-9790).
NO
•
Check the PICK UP FFC.
•
Replace the PICK UP.
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