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3. Interchangeability Adjustment
of the Mechanism
Note 1 : Tracking may need to be preset during
interchangeability adjustment of the mechanism.
Digital tracking is preset by short circuiting TP5A
and TP5B on the PCB-MAIN.
Note 2 : The adjustments are performed in the
PLAYBACK mode, using the staircase signal of
an alignment tape,unless otherwise
specified.Connect an oscilloscope to TP2A and
externally trigger from TP2H.
3-1. Adjustment of BACK TENSION
and TENSION POLE's Position
Run a Blank Tape for several minutes to break in the
REEL DISKs and the Tape Running System before the
adjustment.
1. Play back a dummy Tape.
2. Confirm that "A", the distance between the Holes in
the TENSION ARM and the MAIN PLATE ASSY
shown in the Fig. 3-1-1, is 0.6 ± 0.5mm.
3. If "A" is not 0.6 ± 0.5mm, move the Hole in the BELT
ADJUSTER in the Fig. 3-1-2 within the range shown
by the arrow A to set "A" at 0.6 ± 0.5mm.
4. Set the BACK TENSION measuring jig (Code:
859C345O80) and play-back the tape.
5. Confirm that "A" shown in the Fig. 3-1-1 is 0.0 ±
0.5mm.
6. If "A" is not 0.0 ± 0.5mm at step 5, repeat the
adjustment from step 1.
7. Confirm that the indicated value of the BACK
TENSION measuring jig is within 55 ± 6g/cm.
Note 1 : Check the indicated value of the BACK
TENSION measuring jig when the tape running
condition becomes steady.
Note 2 : Replace the TENSION SPRING if the indicated
value exceeds the specified value.
8. While the tape is running steadily, check visually that
the vibration range of the TENSION POLE is 1mm or
less. If the vibration range exceeds 1mm, replace the
REEL DISK.
TENSION ARM
TENSION POLE
A
BELT ADJUSTER
A
Hole
- 30 -
Fig. 3-1-1
BELT ADJUSTER
Fig. 3-1-2
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