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Verfügbare Sprachen
Verfügbare Sprachen
VC-A30G(BR) VC-A30S{(BR)
VC-A30GM(BR) VC-A30SM(BR}
VC-A30QM(BR) VC-A30SV(BR)
ADJUSTMENT OF TAPE DRIVE TRAIN
1. Remove the cassette housing control assembly.
2. Check and adjust the position of the tension
pole. (See page 20.)
3. Check and adjust the video search rewind back
tension. (See page 20.)
4. Set the tilt angle of the A/C head. (See page 24.)
Ci,
5. Rough adjustment of tape drive train.
!
a) Connect the oscilloscope to the test point for
PB CHROMA envelope output (TP501). Set the
synchronism of the oscilloscope to EXT.
The
PB CHROMA signal is to be triggered by the
head switching pulse (TP502).
b) Loosen the setscrew at the lower part of the
guide roller, and adjust it with an adjusting
screw driver IGDRIVERH-4) so that the guide
Wrinkles at upper flange
Clockwise
roller turns smoothly.
(Do not overloosen the
setscrew, which causes insecurity of the guide
(a)
roller.) (See Figure 1-53.)
c) Set the alignment tape (monoscope pattern)
on the reel disk, and place the unit in the
playback mode.
(Place a 500 g. weight on the cassette tape to
|
prevent floating of the cassette tape.)
Guide roller
[Sy
Wrinkles at lower flange
Counterclockwise
Hexagon na
Weight of 500 g
(b)
Figure 1-55.
Figure 1-53.
Figure 1-54.
d) Change the envelope waveform from MAX to
Notes:
MIN, and MIN to MAX by pushing the (+) or
1. Place the tracking control in the center position,
(-) tracking button, and check a flat response
and adjust the X-position adjusting nut so that
is obtained onthe waveform.
the PB CHROMA envelop becomes maximum for
e) If a flat response cannot be obtained, roughly
easier rough adjustment of the tape drive train.
adjust the guide rollers on the supply side and
2. In the rough adjustment, pay particular
take-up side using an adjusting screw driver
attention to the outlet side.
until a flat response can be obtained.
f) Turn the A/C head tilt adjusting screw with a
screwdriver
to prevent
the tape
from
wrinkling at the upper and lower flanges of
the fixed guide.
(<b)
1) Wrinkles at the upper flange : Turn the
above adjusting screw clockwise, as shown
(\
in Fig. 1-55 (a)
Loosen the setscrew
2) Wrinkles at the lower flange : Turn the
Cd
x postion
above adjusting screw counterclockwise, as
rit
adjusting nut
shown in Fig. 1-55 (b)
Figure 1-56.
Figure 1-57.
26
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