LG CED-8083B Service Manual page 15

Disc recognition is abnormal
Is there CDR/RW signal input
normally? (IC601 pin 33)
YES
Go to "Track Servo is unstable"
RF output is abnormal
Is there
PICK UP (A, B, C, D)
output normally?
(PN401 pin 8, 9, 14, 15)
YES
Is RRF
signal output normal?
(IC401 pin 86)
•
First Recognition try: Over 1.7 Vpp
•
Second Recognition try:
Over 0.5 Vpp
YES
OK
56
NO
Is there RECD1,
RECD2 signal output normally?
(IC401 pin 48, 49)
YES
Replace IC301 (MICOM)
NO
•
Check the PICK UP FFC.
•
Replace the PICK UP.
No
•
Check the connection between
PN401 and IC401.
•
Replace the IC401(CXA2551R).
NO
Go to "RF output is abnormal"
Go to "Laser is abnormal"