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TAPE
DECK
.. ,... .
a. HEAD
REPLACEMENT
AND
HEAD
AZIMUTH
ADJUSTMENT
(a) Head
replacement
After replacement,
demagnetize
the heads
by using a degausser.
Be sure to
clean
the heads before attempting
to make any adjustments.
All wiring should be returned
to the original
position
after work is completed.
(b) Head
azimuth
adjustment
(1)
(2)
(3)
(4)
(5)
-.
-.
..
Load the test tape ( VTT-703,
etc., 10 kHz ) for
azimuth adjustment.
Press the PLAY button.
Use a cross-tip
screwdriver
to turn the screw for
azimuth adjustment
so that the left and right output are maximized.
Press the the STOP button.
After completion
of the adjustment,
use thread lock
( TB-1401B
) to
secure the azimuth-adjustment
screw.
b. MOTOR
REPLACEMENT
(a) Motor
replacement
AND
SPEED
ADJUSTMENT
(b) Motor
speed
adjustment
(1) Insert the test tape ( MTT-11 lN, etc., 3000 Hz).
(2)
Press
the
PLAY
button.
(3) Use a flat-tip screwdriver
to turn the SVR (located inside the rear
of the motor) to adjust SVR so that the frequency
counter
becomes
3,000 Hz.
d
RIP
HEAD "--'
LOW
WHiTE
m
~
MOTOR SPEED ADJ UST
o
J
il
BACK SIDE OF SET
c.
CHECKING
THE
MECHANISM
TORQUES
AND
TENSION
.
Clean the head, capstan
and pinch roller before making any measurement.
Measurement
Take-up torque
Back tension
Tape tension
Cassette for
PLAY:TW-211
1A
Drive-power
cassette
PLAY: TW-21 11A
measurement
F.FWD/REW:TW-2231
TW-2412
PLAY
30-60
gr.cm
2.0-
4.5
gr.cm
60 gr or more
F.FWD
55-120
gr.cm
/
... ./
REW
55-120
gr.cm
...
...
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