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ecessary
in
even if it is
re, this ad-
to be per-
-up follow-
mechanié¢al
axis device
stment is at
| the 2-axis
sceptible to
nore easily.
toms below
Tracking
low or 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.
oscilloscope
(DC range)
Procedure:
main board
CT
,
TP (FEI) o-—7——0
+
TP (FEO)
7
TP (TEI) Qww- -4
TP (TEQ)
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
(FEI)
and
TP
(FEO).
4. Adjustment
RV103
so
that
the
waveform
is as
shown
in the picture below.
(focus gain adjust-
ment)
TIME/DIV:
2mS
——100mV
—ov
@
Incorrent
Examples
(DC
level
is quite
different
from the adjusted waveform) (below)
low focus gain
TIME/DIV:
2mS
—— 250mV
—OoOv
high focus gain
VOLT/DIV:
100mv
TIME/OIV:
2mS
VOLT/DIV:
100mvVv
VOLT/DIV:
100mV
5. Connect the oscilloscope to TP (TEI), TP (TEO).
6. Adjust RV102
so that the waveform is as shown in
the picture below. (tracking gain adjustment)
VOLT/DIV:
100mV
TIME/DIV:
2mS
——-OvVv
@
Incorrect Examples (fundamental wave appears)
low tracking gain
VOLT/DIV:
100mV
TIME/DIV:
2mS
—oOov
high tracking gain
(higher frequency of the fundamental wave
than above}
VOLT/DIV:
100mV
TIME/DIV:
2mS
Adjustment Location:
main board
TP
(RFG)
| Wis
TP
(TEO)
@
TP
(GND)
med
TP (TEI)
TP (ASY)
RV101
RV102
RV
ee TP (TES)
OT avi0s
10202
E
TP (FEI)
~— Component Side—
3-1.
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LAYOUTS
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CIRCUIT
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LOCATION
POWER SW BOARD
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DISPLAY BOARD
VR BOARD
HP BOARD
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MAIN BOARD
CDP-970
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