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ELECTRICAL TROUBLESHOOTING GUIDE -8/10
QQ
3 7 63 1515 0
B.
No disc
.Power on
Does tray open or close?
YES
TE
L 13942296513
Fig.1. SLED Driver waveform
Does the pick-up
slide inner or outer
track?
YES
Fig.2. Focus Driver waveform
Does
the pick-up lens move up
and down?
YES
Slide the pick-up to
inner track.
END
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NO
Push Pick-up to inner track to
PMD03 Pin 10 change
repeatedly, check the voltage of IC2M1
at PMD03 Pins 7, 8 more than
DECK assembly is defective.
NO
Check SLED Driver output.
IC201 Pin 80 IC2M1 Pins 28, 29.
NO
Check Focus Driver output.
(IC201 Pin 88, IC2M1 Pins 37, 38)
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2 9
8
Check loading Part.
the end by hand.
Does
NO
high to low?
YES
Pressing
the open/close key
NO
Pins 14, 15 change
0V to 5V
YES
Does
the voltage change
NO
Q Q
2V on the basis of
3
6 7
1 3
1 5
3.8V?
YES
IC201 Pin 80 no output : IC201 is defective
IC2M1 Pins 28, 29 no output : IC2M1 is defective
IC201 Pin 88 no output : IC201 is defective
IC2M1 Pins 37, 38 no output : IC2M1 is defective
co
.
-71-
9 4
2 8
DECK assembly is defective.
(Limit sw)
check µ-COM Part.
Replace IC2M1.
0 5
8
2 9
9 4
2 8
m
9 9
9 9
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