Akai VS-2EGN

3-4-3 PLAYBACK PAUSE (SIMPLIFIED STILL) MODE
D18,
D19
and
R137
form
an
AND
circuit.
When
Thus,
the
time
constant
of
C22
and
R27
+
R138
causes
Capstan
Motor
Stop
and
EE
go
to
“high”,
TR18
is
turn-
the
width
of
Quasi-Vertical
Synchronization
Pulse
on
ed
on
and
R31
grounded.
Further
when
CUE/REVIEW
Switching
Pulse
CH-1
to
become
400
us.
(The
pulse
goes
to
“low”,
TR19
is
turned
off
and
R27
+
R138
width
on
CH-2
remains
unchanged,
300
ps).
grounded. (See Fig. 7-55).
SERVO l2V
°
RI3O 10K
o
WITCHING .. 8128 100K ~
sue °° OL ae 2h, | B25 c62 1/50 QUASI-VERTICAL SYNS,
ANG9I4 _~® 4 {i——OPULSE OUT
-
--
“7
C22
0.0068
TRIT
Fig. 7-59 Quasi-Vertical Synchronization Pulse Generator
Circuit (PB PAUSE mode)
In each mode, the Quasi-Vertical Synchronization Pulse
should appear as shown in Fig. 7-60.
SW PULSE
CUE MODE
P.B PAUSE MODE
REV MODE
Fig. 7-60 Quasi-Vertical Synchronization Pulse each mode
—_
Service
Manual
VS-2EGN
52