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LO V4300D
4. PICK-UP TRACKING AND TANGENTIAL DIRECTION INCLINATION ADJUSTMENT
• Purpose: Adjust the angle
of
the
pick-up
assembly in the tracking direction
so
that
the
laser beam strikes the disc
perpendicularly (at a
right
angle).
• Symptoms when incorrectly
adjusted: Crosstalk.
Measurement equipment
Measurement equipment
Player condrtion
&
jigs
connecting points
• TV
monitor
• Hexagonal
wrench
(2
mm)
•
Test
disc:
GGVl003
Adjusting procedure
• TV
monitor
" Normal
mode:
Connect to
the video
out- •
Still
mode
put
terminal of
the
•
Tilt servo
OFF
player.
(Unplug the
connector of
CN28)
Note:
This adjustment should
be pet/armed with
the
unit placed horizontally.
I. Play the test disc and search for frame #115.
2, Rotate
the
tracking angle
and
tangential
angle adjust·
ment
screws
alternately and adjust
repeatedly so
that
the crosstalk
occurring
on
the
right
and
left sides
of
the
TV screen becomes
minimum.
Adjustment diagram
FTSB assembly
E3 D
ill
0
;
CN4
'----
....
l!I
0
Tr1cklng
angle direction
adjustment ser9w
Tangential 11ngle
dir«:liOfl
adj1Jstmentscrew
0
0
0
°
Adjusting points
• Tracking direction
angle
adjustment screw,
tan-
gential
direction
angle
adjustment
screw
in the
pick-up
assembly.
Crossu1lk
on the s;creen
0
[I]
Fig. 4-1
Minim1Jmcrosst11lk
1
0
7
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