Does
the slide motor
run
in
t
UP/DOWN
button?
1
Yes
k
the
item
of
“The
slide motor does
not
run”.
During
normal playback track searching,
is
the
___r
Check the connection
of
C750,
etc.
following waveform
being
input
to
pin
4(TClN) of
No
IC750?
Yes
/Gm
IC750
is
defective.
*
Track jump:
When
the following waveform
is
being output to
pin
22 of
Yes
Pinioned
lC750 during track searching.
Kick
Pulse
-P
.
Check the flexible
PWB,
NlCl
and
pickup.
CNP700
during track jump?
No
1
Yes
Is
the following waveform
being
output
to
pin
28(TSOUT)
of
IC750
during track searching?
Yes
l
IC750
is
defective.
No
Pin28
m
After
generating
a
kick
pulse,
(TSOUT)
H
does
a
waveform
appear
like
this?
WY
Check the
IC8.51
and the
LCD
PWB
of
CD.
The
slide motor daes
not
run.
When
the
UP/DOWN
button
is
pressed
in
the test
mode,
is
the slide feed signal
being
output between
pin
25(SS
OUT)
of
IC750
and
pin
15
of
IC720
(l/2
Vcc)?
~
No
Check the peripheral parts
of
IC750.
If
OK,
IC750
is
defective.
I
S
the slide feed signal being output between
pins
3
and
6
of
IC720?
Check the connection between
pin
8
of
IC720
and
pin
25(SS
OUT)
of
No
IC750.
If
OK,
IC720
is
defective.
Is
the slide feed voltage being supplied to the both
ends
of
the slide motor?
1
Yes
No
Check the
CNP720
and flexible
PWB,
and
then connection
of
PWB
pattern.
Check the slide
motor.
Supply 2.0
VDC
to the slide motor terminal, and
if
the
slide
motor does
not
function,
it
is
defective.
The
slide servo
does
not function.
I
Is
the slide control voltage waveform shown at
right
being input
to
pin
27(SS(+))
of
IC750
during playback?
1
Yes
No
Check the
parts
between
pins
27(SS(+))
and
28(TSOUT)
of
IC750
and
then the connection of
PWB
pattern.
Is
the waveform shown at
right
being output to
pin
25(SS
OUT)
of
IC750?
1
Yes
-
IC750
is
defective.
No
The
slide servo system
is
not
defective. Check again from the beginning.
Rotation
cycle
of
sptn
motor
J
Voltage
differs
according
to
disc
eccentricity
-26-
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