Hitachi GCR-8480B User Manual page 6

C. The Laser of Pick-Up doesn't light.
Does "Low" output at IC102
pin ?
15
YES
Is the voltage of IC102 pin
(LDD) 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 FDO (TP9)?
(Refer to Fig. D-1.)
YES
Is the 2.5V 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
Check Q10, C10, C32,
NO
13
R113, R114 and then
replace IC102.
Check the pattern from
NO
IC501 pin
and then replace IC501.
NO
?
Replace IC102.
NO
Replace IC501.
to R42
157
Replace IC201.
25