Aiwa XD-DV290K Service Manual page 41

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 Pin & change
high to low?
YES
the open/close key repeatedly,
check the voltage of CON202 Pin 9
YES
Junction Board
the voltage change at
IC401 Pin %, ^ more than 2V on the
YES
DECK assembly is defective.
NO
Check SLED Driver output.
IC206 Pin
NO Check Focus Driver output.
(IC206 Pin
Does
NO
Pressing
NO
change 0V to 5V
Does
NO
basis of 4.5V?
IC206 Pin
IC401 Pins *, &.
IC401 Pin * no output : IC401 is defective
88
IC206 Pin
, IC401 Pins !, @)
83 IC401 Pin 1, 2 no output : IC701 is defective
55
DECK assembly is defective.
(Limit sw)
check µ-COM Part.
Replace IC401.
no output : IC206 is defective
88
no output : IC700 is defective
83