.............................................................................
LA-3500
...
Grating
After the adjustment of pickup and servo have been done,
playback track 4 and 8 of CD Test disk TCD-725, and confirm
no
sound skip occurs, and then do the adjustment shown below.
And
after the adjustment, readjust pickup and servo.
1. Tangential (A side)
Test
Point Adjust
Mode
Disk
Tangential
HF
roller
(A)
Playback
TCD-725
Adjustment
Track
10
Screw
lnsturment
Adjust
to
Oscilloscope Refer
to
Below
1.
Place the unit
on
the fixture and connect oscilloscope.
Main
Unit
Front Side
Fi
gu
re
11
2.
Playback track 1 O of CD Test disk. (TCD-725)
By playing back track
10 tangential roller (A) [Figure
9]
adjustment screw appears
in
the hole position (A) of the
chassis. [Figure 12]
Front
•
cy
(Al
0
Chassis
Re
verse
Side
Figure
12
3.
Insert a hexawrench
(1
.
5mm)
to
the
hole (A) on reverse side
of
the
chassis
[Figure
12],
and
adjust
tangential
(A)
adjustment screw so that
HF
eye pattern reads maximum.
Then set it to the
center
of the optimum range.
!Oscilloscope Setting I
e VOLT:
100mV
/
div
e
SWEEP
:
0.5~t
sec
/
div
e Input :
AC
Adjustment
to
Maximum
Figure
13
39
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