JVC CH-X1500 Service Manual page 26

CH-X1500
3.3.1 General section
Turn the power on with
no magazine loaded.
Reset
Move the lifter until it
comes to the STOP
position
(shipping position).
YES
Connect the receiver,
etc. and turn the power
on.
Set to the changer
mode.
CD changer indication
appears on the receiv er,
etc.
YES
Load the magazine.
Is the disc pulled out to
start play?
YES
Is the disc taken out?
Is voltage present at
IC521 pin z 2.5 V while
Proceed to the Tracking
Is track selection or
search performed
correctly?
YES
10. Is the playback
sound normal?
YES
Normal
1-26
NO The lifter moves up or
down and stops.
NO
The position motor does
not function.
NO
The tray motor goes
forward and back
several times.
NO
Check the connections
to the receiver or the
circuits in the vicinity of
IC651.
NO
NO
YES
NO
Is the disc rotated?
YES
NO
the disc rotates?
YES
section.
NO
NO
Proceed to the Signal
Processing section.
YES Check the linear position
sensor (VR601).
YES
Check the wiring of the
CD 9 V power supply
position motor.
Check the TRAY-IN and
TRAY-OUT switches.
Proceed to the Focus
section.
Exchange discs, then
check whether or not the
feed motor moves.
Check the MAG SW,
TRAY-IN, and TRAY-
OUT switches.
Set from the STOP to
PLAY mode, then check
that the triangle wave
appears at IC581 pins H
and I .
Proceed to
the Signal
Processing
section.
Does the laser emit?
Proceed to the Focus
section.
YES
NO
Check the RESET
switch and feed
section
(Refer to the Feed section).
NO
YES
NO
Check the vicinity of
IC501 6and 7.
YES