Sony CDP-970 - Diagrams and Layouts

CDP-970
ecessary
in
even
if
it is
>re, this
ad-
to
be per-
;-up
follow-
mechanical
•axis device
stment is
at
I the 2-axis
sceptible
to
nore easily.
toms below
Tracking
low or
high
low
low
high
The
following is a
simple adjustment
method.
-
Simple
Adjustment
-
Note: Since
exact
adjustment
cannot
be performed,
remem-
ber the
positions
of the
controls
before performing the
adjustment. If the
positions
after
the simple adjust-
ment are only a
little
different, return
the controls to
the original
position.
Procedure:
main
board
TP (FED
O*
/
TP
(FEO)
"D
j
^
TP
(TED
0»-
TP
(TEO)
O
^
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
i>
PLAY
button.
3. Connect
the oscilloscope
to TP
(FEl) and TP
(FEO).
4.
Adjustment
RV103 so
that the waveform is
as
shown
in
the picture
below, (focus
gain
adjust-
ment)
VOLT/DIV:
100
mV
T/ME/DIV:
2mS
lOOmV
OV
oscdloscope
(DC
range)
5.
Connect
the oscilloscope to TP (TEl),
TP (TEO).
6. Adjust
RV102
so that the
waveform is
as
shown in
the picture below, (tracking gain adjustment)
VOLT/DIV: lOOmV
TIME/DIV:
2mS
0 V
• Incorrect Examples
(fundamental
wave appears)
low tracking gain
•
Incorrent Examples (DC
level
is quite different
from the adjusted
waveform)
(below)
high focus gain
VOLT/DIV:
100mV
—
Component Side
—
SECTION
3
DIAGRAMS
3-1.
SEMICONDUCTOR LEAD LAYOUTS
BA6208 GP1U52
CXA1291P
DTC114EF
2SC2021
GP1F31T
2SB1274-RS
2SB734-34
2SD774-3
2SC3622K
BR4361F
HZS9B-2L
HZS33-2L
RD4.3ES-B2
1 SSI 32
10E2N
3-2.
CIRCUIT
BOARDS LOCATION
-
5
-
-
6
-
-
7
-