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LG CRD-8483B Service Manual page 6

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C. The Laser of Pick-Up doesn't light.
Does "High" output at IC101
pin
?
11
YES
Is the voltage of IC101 pin
(LD0) 2V?
YES
Check Pick-Up FFC, PN101.
D. The Pick-UP lens doesn't move up and down.
Does the focus search signal
appear at F0S0 (TP9)?
(Refer to Fig. D-1.)
YES
Is the 2V at IC201 pin
?
25
YES
Does the focus search signal
appear between F+ (TP10)
and F- (TP11)?
(Refer to Fig. D-2.)
YES
D-1
NO
Replace IC501.
NO
4
Check Q101, C101, C102
and then replace IC101.
Check the pattern from
NO
IC501 pin
and then replace IC501.
NO
Replace IC101.
NO
Replace IC201.
to R225
160
25

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