Teac X300R - Page 4

X300R/X:300
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24 BRAKE TORQUE
NOTE:
1.
2.
Before making any brake adjustments or measurements,
make sure the power is off.
Mount an empty 7” reel onto either reel table and attach a
spring scale to the reel with a string.
Smoothly pull the scale away from the reel under test and note
the torque value when the reading on the scale is steady. The
proper torque values are given in the chart below.
Follow steps 1 and 2 for each measuring condition; i.e., (A)
through (D) in Fig. 2-4.
_ \f the forward-direction torque is not correct, change the hook-
ing
position
of
the
spring
hanger
(reference
(D)
in
Fig.
2-3)
for
the
corresponding
brake
requiring
adjustment.
If,
after
the
for-
ward-direction
torque
has
been
properly adjusted
and
the
reverse-
direction
torque
is
not
correct,
or
the
forward-direction
torque
is
still
not
correct,
check
to
see
if
the
brake
felt
pad
is
worn,
and
also
check
that
the
brake
mechanism
is
properly
aligned
as
ex-
plained
in
Section
2-3,
“Brake
Mechanism”.
If
necessary,
replace
the
entire
reel
table.
1200 — 1400 g-cm
(16.7 — 19.4 oz-inch)
500 — 700 g-cm
(6.94 — 9.72 02-inch)
150 g-cm
(2,09 02-inch)
Torque calculating formulas:
1. Torque (in g-cm or 02-inch)
= Force or Weight (in g or 0z) x Radius (in cm or inch)
2. Conversion of g-cm to oz-inch:
g-cm x 0.0139 = oz-inch
Fig. 2-4
2-5 REEL MOTOR TORQUE
TAKE-UP TORQUE
1, Hold the right tension arm up using a rubber band.
2. Mount an empty 7” reel onto the right (left) reel table, and
attach a spring scale to the ree! with a string.
3. Place the deck in the forward (reverse) play mode.
4, Allow the rotation of the reel to slowly pull the scale toward the
reel.
5. Hold the spring scale with enough force to allowa steady reading.
6. Measure the take-up torque. The proper values are given in the
chart below.
7. There is no specially-provided adjustment for take-up torque, so
if correction is needed, repair or replace the defective part and/
or circuit.
* X-300R only
330 to 470 g-cm
(4.58 to 6.53 ozinch)
220 to 280 g-cm
(3.06 to 3.89 ozirch)
(B) in REV
(D) in FWD*
(A) in FWD
(C) in REV*
Take-up:
Back tension:
NOTE:
For torque calculation, refer to the formulas pr avided
in Fig, 2-4.
Fig. 2-5