LG CED-8081B Service Manual page 13

Focus Actuator operating is
abnormal
Is there Focus
Search control signal input?
(IC501 pin 3)
YES
Is there Focus
Search drive voltage output?
(IC501 pin 13,14)
YES
•
Check the connection of PN401 pin 1, 4.
•
Check the Pick-up Connector(PN401).
•
Replace the Pick-Up.
Spindle control is abnormal 1
(CD-ROM Disc)
Does FOCUS Servo
operate normally?
YES
Is there RFAC signal input?
(IC201 pin 163)
YES
Go to "Spindle operating is
abnormal"
54
•
Check the connection of IC201 pin 207.
NO
•
Check the communication line between
IC201 and IC301.
•
Replace the IC201 (OTI-9790)
NO
Is Act_Mute signal "L"?
(IC501 pin 9)
YES
•
Replace the IC501(BA5983).
NO
•
Go to "Focus Servo is unstable"
NO
Is there a output normally?
(IC401 pin 34, 33)
YES
•
Replace the IC403(KM4200).
NO
•
Check the connection of IC301 pin
3.
•
Replace the IC301(MICOM).
NO
•
Replace the IC401(OTI9071).