ADJUSTMENT OF TAPE DRIVE TRAIN
Remove the cassette housing control assembly.
Check and adjust the position of the tension
pole. (See page
Check and adjust the video search rewind back
tension. (See page
Set the tilt angle of the A/C head. (See page
Rough adjustment of tape drive train.
Connect the oscilloscope to the test point for
envelope output
Set
the synchronism of the oscilloscope to EXT.
The
signal is to be triggered by
the head switching pulse
Loosen the setscrew at the lower part of the
guide roller, and adjust it with an adjusting
screw driver
so that the guide
roller turns smoothly. (Do not overloosen the
setscrew, which causes insecurity of the guide
roller.) (See Figure
Set the alignment tape (monoscope pattern)
on the reel disk, and place the unit in the
playback mode.
(Place a
g weight on the cassette tape to
prevent floating of the cassette tape.)
Guide roller
Hexagon
Figure
Figure
Change the envelope waveform from MAX to
and
to MAX by pushing the
or
tracking button, and check a flat response
is obtained on the waveform.
a flat response cannot be obtained, roughly
adjust the guide rollers on the supply side and
take-up side using an adjusting screw driver
until a flat response can be obtained.
Turn the
head tilt adjusting screw with a
s c r e w d r i v e r t o p r e v e n t t h e t a p e f r o m
wrinkling at the upper and lower flanges of
the fixed guide.
Wrinkles at the upper flange Turn the
above adjusting screw clockwise, as shown
in Figure
(a).
Wrinkles at the lower flange : Turn the
above adjusting screw counterclockwise, as
shown in Figure
Wrinkles at upper flange
Clockwise
Wrinkles at lower flange
Counterclockwise
Figure
Notes:
Place the tracking control in the center position,
and adjust the X-position adjusting nut so that
the
envelop becomes maximum for
easier rough adjustment of the tape drive train.
In the rough adjustment, pay particular
attention to the outlet side.
. .
Loosen the setscrew
Figure
X-position
adjusting nut
Figure
Summary of Contents for VT-3418X
Page 54: ...VT 341 8X VT 51 18X is z 0 Y Y c U T J 2 c 4 54 ...
Page 61: ...VT 341 8X VT 51 18X TROUBLESHOOTING OF TV SECTION I I I I 1 I I I I I I I ___ I iiE I b z 61 ...
Page 74: ...m 3418X i T 5118X VCJ AV UNIT 7 I 8 I 9 I 10 I 11 I 12 I 74 ...
Page 76: ...VT 341 8X VT 5118X VCJ AV UNIT I 7 I 8 I 9 I 10 I 11 I 12 1 76 ...
Page 78: ...PWB B V I D E O CHROMA J U N G L E 7 I 8 I 9 I 10 I 11 I 12 I 78 ...
Page 80: ...PWE 8 I 1 V I D E O CHROMA JUNGLE hr r I 7 I 8 I 9 I 10 I 11 I 12 I 80 ...
Page 86: ...VT 341 8X VT 5118X 7 I 8 I 9 I 10 I 11 I 12 I 86 ...
Page 88: ...rr J I I TUNER w2o1 m ...
Page 89: ...n 3 30 ...
Page 90: ...VT 341 8X VT 5118X VCJ AV UNIT DUNTK830 I WEV3 I I I m c I 7 I 8 I 9 I 10 1 11 I 12 I 90 ...
Page 92: ... VT 341 8X VT 51 18X DUNTK8302WEV 1 DUNTK8303WEV I I 7 I 8 I 9 I 10 I 11 I 12 I 92 ...
Page 94: ...VT 341 8X VT 5118X DUNTK8302WEV3 DUNTK8303WEV3 7 I 8 I 9 I 10 I 11 I 12 I 94 ...
Page 97: ... _ _ _ __ D I m I n I t3 I m I n I GI I I 1 ...
Page 98: ...Memo _ a _ _ 98 ...
Page 102: ...I REC I w r I I I CAPSTAN FG 7 I 8 I 9 I 10 I 11 I 12 1 102 ...
Page 106: ...CASSETTE SW REC TIP I ED M I I II DFfwPG I I I I I I I I I I I I ...
Page 110: ...VT 341 8X I VT 5118X 1 J 7 I 8 I 9 I 10 I 11 I 12 I 110 ...
Page 112: ...VT 341 8X I T 5118X 1 WAVEFORMS 112 ...
Page 115: ...SCHEMATIC DIAGRAM n VCR Main Unit r 7 I 1 I 2 I 3 I 4 I 5 I 6 115 ...
Page 119: ...D I c9 I n I u I m I n I GI I I I ...
Page 123: ...D I a I n I u I m I n I GI I I I ...
Page 124: ...11 I 12 I ...
Page 126: ...J l J I i _ _ _ ___ I _ _ n f f 7 I 8 I 9 I 10 I 11 I 12 126 ...
Page 152: ...VT 341 8X VT 5118X MECHANISM CHASSIS PARTS 152 ...
Page 155: ...H G F E D C B A CASSETTE HOUSING CONTROL PARTS 1 I 2 I 3 I 4 I 5 I 6 I 155 ...
Page 157: ...MECt 1 I 2 I 3 I 4 I 5 I 6 157 ...
Page 158: ...VT 341 8X VT 51 18X I I 7 I 8 I 9 I 10 I 11 I 12 I 158 ...
Page 161: ...H G F E D C B A VT 341 8X VT 5118X 1 2 I 3 I 4 I 5 I 6 161 ...
Page 162: ...VT 341 8X VT 51 18X I I 7 I 8 I 9 I 10 I 11 I 162 12 I ...
Page 163: ... 1 DEL VT 3418X CABINET AND MECHANICAL PARTS 0 II I L e e m I w F J 1 I 2 I 3 I 4 I 5 I 6 163 ...
Page 164: ... ...
Page 169: ...Memo m 169 ...
Page 170: ...S H A R P T98 19 S Printed in Japan 0 w s MW KD ...