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LD-7QO/KU
IMO.
OSCILLOSCOPE
V
H
TEST
POINT
ADJUST-
MENT
POINT
CHECK
POINT/
ADJUST-
MENT
STANDARD
ADJUSTMENT PROCEDURE
VIDEO LEVEL
2
ADJUSTMENT
0.5V/div
10jus/div
Q222
emitter
VR203
2Vp-p
•
Observe
the video
signal
from
the
Q222
emitter
and
confirm
that the
level
between
the white
peak and
synch
tip
is
2V.
if
the
voltage
is
not
correct,
adjust
VR203.
0.5V/div
0.5V/div
10/is/di
v
0213(E)
0222(E)
Same
chroma
level
MIXING LEVEL
ADJUSTMENT
• Use
search to
locate
the
magenta
pattern of
chapter
20
.
•
Adjust
VR204
so that the
Q213
emitter
and
Q222
chroma
levels
are
the same.
1
V/div
5/as
/d
i
v
Z203
(25)
VR207
5/js
HD
1
PULSE
WIDTH ADJUSTMENT
•
While playing
a disc
(with
SPDL
lock on), adjust so
that the
HD1
signal
pulse
width
at
pin
25
of
PA9001
is
5/as.
3-1
1
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- Removing the External Parts
- Mechanism
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