Simple Adjustment; Adjustment Location; Main Board - Sony CDP-590 Service Manual

Gain
Symptoms
^
Focus Tradcing
• The
time
until music starts
becomes
longer for
STOP
-»>PLAY
or automatic
selection
(!<
PW
buttons)
pressed.
(Normally takes
about
2 seconds.)
low low
or high
•
Music does not
start
and
disc
continues to rotate
for
STOP -t>PLAY
or
auto-
matic selection
(!<
buttons pressed.)
—
low
•
Sound
is
interrupted
during
PLAY. Or
time counter
display stops progressing.
—
low
• More
noise during 2-axis
device operation.
high high
The
following
is a
simple adjustment method.
•
Incorrect
Examples (DC
level is quite different
from
the adjusted
waveform)
(below)
VOLT/DIV
:
!00mV
high focus
gam
TIME/DIV
:
2mS
Simple Adjustment
Note: Since exact adjustment cannot be performed, remember
the
positions of the controls before performing the adjustment.
If
the positions after the simple adjustment are only a
little
different, return the controls to the original position.
5.
Connect
the oscilloscope to
BD
BOARD,
TP
(TEO).
6.
Adjust
RVlOl
so
that the
waveform
is
as
shown
in
the picture below, (tracking gain adjustment)
Procedure:
oscilloscope
(dC range)
60
board
TP (FEO)
TP (TEO)
TP
(VC)
1.
Keep
the
set flat.
If
the
set is
not
horizontal, this
adjustment cannot be
performed due
to the gravity against the 2 axis device.
2.
Insert
the disc (YEDS-18) and press
>
PLAY
button.
3.
Connect
the oscilloscope to
TP
(FEO) and
TP
(VC).
4.
Adjustment
RV102
so that the
waveform
is
as
shown
in
the picture below,
(focus
gain adjustment)
VOLT/DIV
:
lOOmV
TIME/DIV
:
2mS '
•
Incorrect
Examples (fundamental
wave
appears)
low tracking gain
high tracking gain
(higher frequency of the fundamental
wave
than above)
•Adjustment
Location
:
MAIN
BOARD
(Component
side)
-
8
-
-
9
-