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TC-766-2
|
Supply Reel Back Tension Adjustment
Fast Forward
and Rewind
Back Tesnion
Check
Note: This
adjustment
requires
a ultra-low
.
Apply the rated ac voltage to AC IN.
frequency audio signal generator.
If the
'
;
;
;
dichal generator av NOE available, AO HOt
Turn either the left- or right-side tension arm
attempt this adjustment.
on using a rubber band.
Remove
the side board (left).
.
Put a torque
meter
on the supply reel table.
In fast forward mode, pull the torque meter in
the arrowed direction at a speed of 19—9.5cm/s
Set RV702 to the fully-counterclockwise stop.
and read the fast forward back tension on the
Apply the rated ac voltage to AC IN.
Put a torque meter on the supply reel table.
torque meter.
Unsolder the RED and WHT lead wires from
.
Puta torque meter on the take-up reel table.
the FG at the system control board.
In rewind
mode,
pull the torque
meter
and
read the rewind back tension as in step
3.
Set the signal generator's frequency to 20.2 Hz
P
and attenuator
to -20dB.
supply reel table
take-up reel table
Connect the signal generator to the points from
where
the
two
lead
wires are unsoldered
in
step 5.
Set
REEL
SIZE
switch
to
10%
and
TAPE
bse (eter
SPEED
switch to 19cm.
In
playback
mode,
adjust
RV702
for
the
Sarthe wandien
Bho
| ~~] Back tension torque _|
——————
150 g-cm (2.1 oz-inch)
REE Sige Ga
120 g-cm (1.65 oz-inch)
7
110-150 g-cm
80-120 g-cm
Change the audio signal generator's frequency
(1.6—2.0 oz-inch) | (1.15—1.60z-inch)
Torque meter reeding
280-340 g-cm
(3.9—4.7 oz-inch)
220-280 g-cm
(3.1-—3.8 oz-inch)
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