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Disc Rotation is unstable.
Does the spindle
motor kick signal and
driving signal output from
the IC701 pin12(MDP)?
<Fig.1>
YES
Does the
spindle driving signal
output from IC402 normally?
(CD: IC402 pin7 <Fig.2>
DVD:IC402 pin6
<Fig.3>)
YES
Does the
IC401 spindle driving
signal output from pin22
normally? <Fig. 4>
(For CD and DVD)
YES
Does the
spindle driving signal
output from IC401 pin 2, 4
and 7 normally?
(For CD and DVD)
<Fig.5>
YES
Check the cold soldering
for the PN401 and Flat cable
connecting status.
YES
Replace the Spindle motor.
50
<Fig. 1>
<Fig. 2>
<Fig. 4>
<Fig. 5>
NO
NO
<Fig. 3>
NO
NO
Check the cold soldering for the
IC701 and then replace IC701.
Check the cold soldering for the
R421, C409 and IC402 and then
replace IC402.
Check the cold soldering for the
R414, R406, R407, R404 R405
and IC503 and then replace
IC503.
Check the cold soldering for the
IC401 and then replace IC401.
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