Zenith XBV243 series Service Manual page 52

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
Adjustment Procedure/Diagrams
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.
A/C Head Base
Fig. C-5-1
X- Value Adjustment
Hole
Fixed Screw
Azimuth Adjustment
Screw(A)
A/C Head Assembly
Fig. C-5-2
VR168 - 923-03485
MECHANISM - VCR
Play the blank tape
4) Reconfirm the Tape Path after Playback about 4~5 sec-
onds.
NOTE
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.
T ilt Adjustment
Screw(C)
Height Adjustment
Screw(B)
4-16
Adjustment Point
Tilt Adjustment Screw (C)
Height Adjustment Screw (B)
Azimuth Adjustment Screw (A)
A/C Head
Tape
0.2~0.25mm
Fig. C-5-3
Tape
P4
D35E COMBO - SERVICING