Sharp VT-3448X Service Manual page 35

Adjustment
If the reading of the cassette torque meter is less than
specified, move the tension spring hook toward A.
If the reading of the cassette torque meter is more than
specified, move the tension spring hook toward B.
A
Figure l-20.
CHECKING THE BRAKE TORQUE
Checking the brake torque at the supply side
l
Figure 1-21.
Remove the cassette housing control assembly.
l
Make a short-circuit between TP7701 and TP7702,
l
both located at the rihgt on your side on the main PWB.
Now plug in the AC cord.
Setting
l
supply reel disk.
Checking
l
onds) in the clockwise (CW) direction and counterclockwise
the indicator of the torque gauge rotate at an equal rate.
Check that the values are within the range of CW direction =
is at least twice as high as that in the CCW direction.
Tension arm
Supply reel disk
Checking the brake torque at the take-up side
Torque
Take-up reel M
disk
r
Figure l-22.
Remove the cassette housing control assembly.
Make a short-circuit between TP7701 and TP7702,
both located at the right on your side on the main PWB.
Now plug in the AC cord.
Setting
Set a torque gauge to zero on the scale. Place it on the take-
up reel disk.
Switch from the FF mode to the STOP mode.
Disconnect the AC power plug.
Checking
Rotate the torque gauge (approx. one revolution per 2 sec-
onds) in the clockwise (CW) direction and counterclockwise
the indicator of the torque gauge rotate at an equal rate.
Check that the values are within the range of CCW direction=
is at least twice as high as that in the CW direction,
.
Adjustment of the brake torque at the supply side and
the take-up side
If the supply or take-up brake torque is outside the range,
clean the supply or take-up reel disk brake lever pad, then
recheck the torque.
If the supply or take-up brake torque is still outside the
range, replace the main brake ass'y.
Note:
When the main brake is replaced, per-f rm the height checking
and adjustment of reel disks (see page 30), and the brake
torque checking.