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3513S11(N)
2-2.
SERVO
CIRCUIT
ADJUSTMENT
Q
These adjustments should be carried out upon completion of the tape transport adjustments.
. If the tape transport adjustments (except the tilt adjustment) are carried out after these adjustments,
follow the procedures
-
again in Item 1 SWITCHING
POSITION ADJ.
. When a cassette tape is loaded, auto-tracking will be set immediately after starting the first playback. As this will deviate the
tracking center set, be sure to press tracking buttons (+) or (–) once directly after starting playback to prevent auto-tracking from
being set. Press the tracking buttons (+) and (-) simultaneously,
the tracking control to the center position.
o Unless otherwise specified, all test point and adjustment location on the CP-1 board.
10.
1
—
2
A
Item
SWITCHING
POSITION
SP SLOW
TRACKING
Input
Alignment
cassette
(VHJ-0009
VHJ%23)
Colour bar
from
Colour bar
generator
Mode
PLAY
SP mode
REC
I
PLAY
i
STILL
1
SLOW
Point
VIDEO
OUTPUT
TPIOI
RF SW
pulse
TP183
(Video pre-
amp unit)
TV screen
Location
VR351
TRACKING
buttons
and
REC button
Front panel]
Remark
W25SC01
~65Hfi
RF switching
pulse
Vtdeo
signal
7654321
—
V sync
1
Press the tracking buttons (+) and (-) simul-
taneously to the tracking center position (in-
dicator panel displayed: "T
—:—
").
2. Adjust VR351 so that the phase of the lead-
ing edge of the vertical sync signal is delayed
6.5 t 0.5 H from the rise of the RF switching
pulse waveform.
W20S011
Noise
at —
upper
side
m
':"
1.
2.
3.
4.
5.
6.
w~~~de
Set the VCR in the SP REC mode and record
at the middle of the cassette tape.
Playback the recorded part, and set the SP
STILL mode.
Press the tracking buttons (+) or (-) until V
jitter (very fine movement
of the vertical
sync.) is minimized.
Set the SP SLOW mode by remote control unit.
Press the tracking buttons (+) and (-) simul-
taneously to adjust the tracking to the center
position (displayed: "T
—:—
").
Press the REC button during the tracking
center display (approx. within
three sec-
onds), at this time make sure that display as
shown 'T—
:
—".
Press tracking buttons (+) or(-) to send away
the noise which appears on the monitor
from the screen, and also adjust the position
of the noise at the upper side of the screen to
the similar position of the one at the lower
side judging from the center of the screen.
Press the REC button during the tracking
center display (approx. within
three sec-
onds), at this time make sure that display as
shown "T—
:
—".
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–3–
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