LG CRD-8483B Service Manual page 10

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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 TEI (TP14) signal
appear?)
YES
Does RFAC signal (TP16)
appear?
YES
Is Spindle Servo ON?
(Does DMS0 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 IC101 pin
?
8
YES
Replace IC101.
NO
Does E, F signal appear
at IC101 pin
,
9
NO
Does PDA signal appear
at IC101 pin
?
43
YES
Replace IC101.
NO
Replace IC501.
NO
Does the other disc
operate normally?
YES
Disc is defective.
NO
,
7
NO
?
10
NO
NO
Replace Main Circuit
Board or MD Ass'y.
Refer to C.
(The Laser of Pick-Up
doesn't light.)
29

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