Teac A-4070G - Page 14

TAKE-UP TORQUE MECHANICAL CHECK
WN RF
Block the shut-off arms in the ON position.
Place
tape
tension
switch
in
REGULAR
position.
Place
an
empty
reel
(RE-701)
on
right
reel
table.
Rotate
the
reel
and
wind
several
turns
of
string
around
the
hub.
Attach
the
spring
scale
to
the
string,
depress
the
Bb»
button.
Allow
the
rotation
of
the
reel
to
slowly
draw
the
scale
toward
the
hub.
‘The
spring
scale
should
indicate
300
+20
g-cm
(4.2%4.6
oz~inch)
. Adjust R-801 as required.
BACK
TENSION
MECHANICAL
CHECK
————————
el
.0
0
Place
the
reel
and
spring
scale
on
the
left reel
table,
depress
the
B®
button.
Pull
the
scale
away
from
the
reel
against
the
mctor
torque
with
a smooth
steady
motion.
The
scale
should
indicate
230
+20
g-cm
(3.2%3.6
oz-inch).
. Adjust R-802 as required.
NOTE
Torque
and
back
tension
measurements
may
be
made
in
either
direction
(forward,
reverse)
of
play.
Fig. 6-3 Torque Measurement Forward and Reverse Side