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ADJUSTMENT PROCEDURE
1. SERVO ADJUSTMENT
1-1. Preparation
Set the VR123 is center position.
Connect the cables to the test point. (Fig.-1)
1-2. Focus gain adjustment
Load the test disc (YEDS-18) on the tray and play the track 2.
Adjust R123 until 1kHz the waveform of channels 1 and 2 on
oscilloscope become specified level.
Check the jitter meter reading . It must be less than 12ns.
1-3. Remove the oscilloscope and audio oscillator.
Audio
Oscillator
TE
L 13942296513
Adjustment points
P105
LD Short
Land
P104
R123
Focus Gain
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.
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Oscilloscope
NADG-7323
CH 1
CH 2
+
+ +
G G
G G
R123
(Fig.-1)
NADG-7323
x
ao
y
i
8
(Fig.-2)
CH1
VC
P105
(RF)
FE2
P104
CH2
Q Q
FE1
3
6 7
1 3
The driver for adjustment when adjusting is using the driver
for adjustment insulated so that it may not be effected of a hand.
Adjustment driver
u163
.
The quality of the material insulated
2 9
9 4
2 8
Wave form
A:B=1:1.25
1 5
0 5
8
2 9
9 4
(Fig-2)
m
co
Less than 1.4
C-701A
9 9
A
B
2 8
9 9
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