Sharp VC-780E

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Hi i
a ee
Adjustment of APC
instrument
Ce
Specification
1.
insert
the
alignment
tape
(VROCPSV)
and
place
the
unit
to
the
playback
mode.
2.
Connect
the
frequency
counter
to
TP5/08.
Adjust
R5812
(APC
control)
so
that
the
counter
reading
be
3.579545MHz
+
20Hz.
Frequency counter
Adjustment
of
NTSC
Skew
Compensation
Measuring
Oscilloscope
instrument Monitor TV
Mode
Playback
(SP
still
mode)
Alignment
tape
(VROCPSV)
Test
point
CH-1:
TP701
CH-2:
Video
output
terminal
Adjusting
point
R440
(Flicker
control)
|
Specification
No
flicker
on
the
monitor
TV
screen
1.
Insert
the
alignment
tape
(VROCPSV)
and
place
the
unit
to
the
playback
still
mode.
2.
Observe
the
output
of
TP701
(head
switching
pulse)
and
video
output
with
an
oscilloscope.
3.
Adjust
R440
so
that
there
is
a
video
level
difference
of
+
0.1V
between
Channel-1
output
(head
switching
pulse’s
High
level)
and
Channel-2
output
{head
switching
pulse’s
Low
level).
4.
If
the
colour
flicker
is
so
noticeable
on
the
TV
monitor,
finely
adjust
R440
so
that
there
is
the
least
deviation
of
flicker
on
the
screen.
36
VC-780E
VC-790ET