LG CED-8042B Manual page 54

Spindle Control is abnormal 1.
Is there RFAC Signal input?
(IC501 pin 13)
NO
Is IC601 pin 29 output normal?
(DECEFM)
NO
Check the output status of IC601
pin 29 when it open.
Normal ?
YES
Check the status of R and C
peripheral circuit of IC605
(BU4066) and IC507.
Spindle Control is abnormal 2.
YES
Is MDP signal output
normal?
(IC501 pin 117)
YES
Is there spindle drive voltage
output in IC556 pin 1?
YES
Is there spindle drive voltage
ouput in IC552 pin 1?
NO
Is IC555 pin 5 "H"?
NO
Check Disc Recognition.
If it's OK, Replace IC555
and IC209 after checking.
YES
Replace IC507 (TC7SH04F).
NO
Replace IC601 (AK8563).
Go to <Picture 5>
NO
Does Track Servo operate
normally?
YES
Check the peripheral circuit of IC501.
If it's OK, replace IC501 (CXD3011R-1).
NO
Check the peripheral circuit of IC556.
If it's OK, replace IC506 (NJM2100).
YES
A
Go to "Tracking Servo is
YES
Replace IC555 (TC4W53FU).
NO
unstable"
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