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LG CRD-8402B Service Manual page 11

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F. TOC isn't read.
Is the Focus Servo ON?
(Does FEO (TP15) signal
appear?)
YES
Is the Tracking Servo ON?
(Does TEO (TP14) signal
appear?)
YES
Does RFAC signal (TP16)
and RFDC signal (TP17)
appear?
YES
Is Spindle Servo ON?
(Does MDP signal (TP25)
appear?)
YES
Is TOC area on the disc
read? (Does LED flicker?)
YES
Normal
Does A, B, C, D signal
NO
appear at IC102 pin
,
,
?
7
8
9
YES
Replace IC102.
NO
Does E, F signal appear
at IC102 pin
,
10
Does A, B, C, D signal
NO
appear at IC102 pin
,
,
?
7
8
9
YES
Replace IC102.
NO
Replace IC501.
NO
Does the other disc
operate normally?
YES
Disc is defective.
NO
,
6
NO
?
11
NO
,
6
NO
Replace Main Circuit
Board or MD Ass'y.
Refer to C.
(The Laser of Pick-Up
doesn't light.)
27

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