Zenith XBV243 series Service Manual - Mechanism - Vcr
MECHANISM - VCR
VR168 - 923-03485
4-16
D35E COMBO - SERVICING
AUDIO/CONTROL (A/C) HEAD ADJUSTMENT
Purpose: To insure that the Tape passes accurately over
the Audio and Control Tracks in exact Alignment in
both the Record and Playback Modes.
PRELIMINARY ADJUSTMENT
(Height and Tilt Adjustment)
Perform the Preliminary Adjustment when there is no
Audio Output Signal with the Alignment Tape.
Test
Equipment/ Fixture
Blank Tape
Screw Driver(+) Type 5mm
Play
the
blank
tape
Adjustment
Point
Tilt
Adjustment
Screw (C)
Height
Adjustment
Screw (B)
Azimuth
Adjustment
Screw (A)
Fig.
C-5-1
A/C
Head
Base
Fig.
C-5-2
Height
Adjustment
Screw(B)
T
ilt
Adjustment
Screw(C)
Azimuth
Adjustment
Screw(A)
X-
Value
Adjustment
Hole
Fixed
Screw
Fig.
C-5-3
A/C
Head
Tape
Tape
0.2~0.25mm
P4
1) Initially adjust the Base Assembly A/C Head as shown
Fig. C-5-1 by using the Height Adjustment Screw (B).
2) Play a Blank Tape and observe if the Tape passes
accu-
rately over the A/C Head without Tape Curling or
Folding.
3) If Folding or Curling is occured then adjust the Tilt
Adjustment Screw(C) while the Tape is running to resem-
ble Fig. C-5-3.
4) Reconfirm
the
Tape
Path
after
Playback
about
4~5
sec-
onds.
Ideal A/C head
height
occurs,
when
the
tape
runs
between
0.2~0.25mm
above
the
bottom
edge
of
the
A/C
head
core.
NOTE
Adjustment Procedure/Diagrams
A/C
Head
Assembly