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