Sharp SYSTEM-CD555ZT(GY) - Speaker Box Exploded View

_SYSTEM-CD555z4
Check the item of “The slide motor does not run’.
Does
the
slide
motor
run
in
the
test
mode
using
the
UP/
DOWN
button?
No
Yes
During
normal
playback
track
searching,
is
the
following
Check
the
connection
of
C750,
etc.
waveform
being
input
to
pin
4
(TCIN)
of
IC750?
No
Yes TE
Is
the
following
waveform
being
output
to
pin
10
(DATA
10750
is
defective.
OUT) of IC750 during track jump? No
Yes Pinto SUULInan
roa, VV
(CIN)
Is the following waveform being output to pin 16 of
CFS700 during track jump? No
*
Track
jump:
When
the
following
waveform
is
being
output
to
pin
28
{TSOUT)
of
1C750
during
track
searching.
Kick Pulse
Check the CFS700, flexible PWB and pickup.
|
Yes
Ce
Is the following waveform being output to pin 28
{TSOUT} of IC750 during track searching? No
AWWW oT
After generating a kick pulse,
Pin
28
ae
does
a
waveform
appear
like
this?
(TSOUT)
Check the IC951 and the LCD PWB of CD.
IC750 is defective.
Yes
When the UP/DOWN button is pressed in the test mode, Check the peripheral of IC750. If OK, IC750 k fective:
is the slide feed signal being output between pin 25 (SS No. Perpers! parts K, IC750 is defective
OUT) of 1C750 and pin 13 of IC720 (1/2 Voc)?
Is
the
slide
feed
signal
being
output
between
pins
3
Check
the
connection
between
pin
13
of
IC720
and
pin
25
(SS
OUT)
of
and
5
of
IC720?
No
1C750.
if
OK,
C720
is
defective.
f Yes
Is the slide feed voltage being supplied to the both ends
of
the
slide
motor?
No
Yes
Check the CNP720 and CNS720.
Check
the
slide
motor.
Supply
2.0
VDC
to
the
slide
motor
terminal,
and
if
the
slide
motor
does
not
function,
it
is
defective.
is the slide control voltage waveform shown at right
being input to pin 27 (SS(+)) of IC750 during playback?
Yes
is the waveform shown at right being output to pin 25
(SS OUT) of 1C750?
Check
the
parts
between
pins
27
(SS(+))
and
28
(TSOUT)
of
1C750
and
then
the
connection
of
PWB
pattern.
Rotation cycle of spin motor
IC750 is defective.
The
slide
servo
system
is
not
defective.
Check
again
from
the
beginning.
Voltage differs according to
disc eccentricity
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