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I
CHECKING THE BRAKE TORQUE
Checking the brake torque at the supply side
l
Figure l-24.
Remove the cassette housing control assembly.
l
Make a short-circuit between TP8804 and
l
on the VCR PWB, with a 22 ohm resistor. Now
turn on the power.
gauge to zero on the scale. Place it
Set a torque
on the supply reel disk.
Checking
l
direction of the supply brake so that the reel disk
and the indicator of the torque gauge rotate at
an equal rate. Check that the values are within
the range of CW direction = IO-50mN.m
the CCW direction.
, Supply reel disk
the brake torque at the take-up
l
Figure l-25.
Remove the cassette housing control assembly.
l
Make a short-circuit between TP8804 and
l
on the VCR PWB, with a 22 ohm resistor. Now
turn on the power.
on the take-up reel disk.
Checking
l
direction of the take-up brake so that the reel
disk and the indicator of the torque gauge
rotate at an equal rate. Check that the values
are within the range of CCW direction=
torque in the CCW direction is at least twice as
high as that in the CVV direction.
Adjustment of the brake torque at the supply
l
side and the take-up side
the range, clean the supply or take-up reel disk
break lever pad, then recheck the torque.
outside the range, replace the main brake ass'y
or the main brake spring.
Note:
When the main brake is replaced, perform the
height checking and adjustment of reel disks (see
page 22), and the brake torque checking.
side
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