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LG CRD-8402B Service Manual page 9

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E. Disc doesn't rotate.
Does the signal appear at
FOK (TP18) during focus
search?
(Refer to Fig. E-1.)
YES
Do the signal appear at
TP15 (FEO) and TP19
(SENS)?
(Refer to Fig. E-3.)
YES
Does the signal appear at
the MDP (TP25)?
(Refer to Fig. E-4.)
YES
Do the signals appear at
IC201 pin
(W),
(V),
13
12
and
(U)?
14
YES
Check the pattern from
IC201 pin
12
,
,
13
14
PN201
,
,
.
13 12
11
OK
Check Spindle Motor FFC
and then replace the
Spindle Motor.
Does the signal appear at
NO
FEO (TP15) when the
R505 opened?
(Refer to Fig. E-2.)
Replace IC501.
NO
Replace IC501.
NO
Replace IC501.
NO
Replace IC201.
to
NO
YES
Replace Pick-Up.
25

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