Nakamichi 481, Руководство по обслуживанию

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5.3. Record Head and Playback Head Tilt Adjustment
Note: On items 5.3 — 5.8, please refer to Fig. 5.4 flow
chart.
Refer to Figs. 5.5 and 5.6.
(1) Load a Tilt Check Gauge M-9039 (DA09039A) in the
N-481.
(2) Clip the grounding terminal of the Tilt Check Gauge
with one end of the cord with clip, and the other end to
the chassis of the N-481.
(3) Remove both of the Height Gears.
(4) Set the N-481 in play mode. Check to insure whether
the Beacons Playback Head “Upper” or “Lower” and
Record Head “Upper” or “Lower” are illuminating. In
order not to give damages onto the head surfaces,
push both of slide knobs of the Gauge to the direction of
arrow marks, then return it to the original place to be in
contact with record head and play back head surfaces
after play mode is securely locked.
(5) Check to insure freedom from contact between the
Gauge and pad lifter.
(6) Beacon Playback Head “Lower” will light on when
height adjustment screw (P) turned clockwise but
Playback Head “Upper” when counterclockwise. Adjust
so that both “Upper” and “Lower” will light on even
when you move the slide knob to the direction of an
arrow mark and then return it to the original place.
(7) Same procedures will apply to the Beacons Record
Head “Upper” and “Lower”, except for the height
adjustment screw (A).
(8) Set the N-481 in stop mode and fit both of the ser rated
height gears. Then set the N-481 again in play mode
and insure all of the 4 Beacons are illuminating. If not,
(3) through (7) will have to be repeated till satisfactory
results are obtained.