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B.
No disc
Power on
Does tray open or close?
YES
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
Check loading Part.
NO
Push Pick-up to inner track to
the end by hand.
CON202
the open/close key
repeatedly, check the voltage of
CON202 Pin
Junction Board
the voltage change
at IC401 Pin
2V on the basis of
DECK assembly is defective.
NO
Check SLED Driver output.
IC206 Pin
NO
Check Focus Driver output.
(IC206 Pin 83, IC401 Pins 11,12)
Does
NO
Pin17
change
high to low?
YES
Pressing
NO
9
change
0V to 5V
YES
Does
NO
15
,
16
more than
4.5V?
YES
IC206 Pin
88
IC401 Pins
18
,17.
IC401 Pin
IC206 Pin
IC401 Pin
3-9
DECK assembly is defective.
(Limit sw)
check µ-COM Part.
Replace IC401.
88
no output : IC206 is defective
18
no output : IC401 is defective
83
no output : IC700 is defective
1
,
2
no output : IC701 is defective
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