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C-483GS,GB,N
1) Take-up Side Medium Braking
Notes:
1. Check medium
braking before checking strong
braking.
2. Measure within 10 seconds after plugging in the
power cord and return shorted parts.
3. Check the take-up side medium braking torque in
the clockwise and counterclockwise directions of
rotation.
4. The specified value for the take-up side medium
braking torque is greater than 100 g.cm and less
than 1/2 the strong braking torque on the supply
side.
Checking
j. Remove the cassette housing.
2. Unplug the power cord, and short pin (10) of the
system control board IC807 to GND.
3. Separate the reel idler from the take-up reel and
set the torque gauge.
. Plug in the power cord.
. Rotate the torque gauge slowly (about 1 turn ev-
ery 2 to 3 seconds), and check that the take-up
side medium braking torque is greater than 100
g.cm.
os
Both
Reel Idler
directions
Torque
Gauge
——
Reel Pulley Take-up Reel
Take-up Reel
Figure 18
3) Supply Side Strong Braking
Notes:
1. Measure within 10 seconds after plugging in the
power cord and return shorted parts.
2. Check
strong
braking
after checking
medium
braking.
e Checking
1. Remove the cassette housing.
2. Unplug the power cord, and short pin (14) of the
system control board IC807 to GND.
3. Separate the reel idler from the supply reel and
set the torque gauge.
4. Plug in the power cord.
5. Rotate the torque gauge slowly in the clockwise
direction (about 1 turn every 2 to 3 seconds).
Check that the supply side strong braking torque
is greater than 300 g.cm and greater than twice
the medium braking torque on the take-up side.
Clockwise direction
Reel Idler -
i
Torque Gauge - +
|
Piel
Torque Gauge
/
eae
Reel Idler
Supply Reel Ree! Pulley
Supply
Reel
Figure 19
4) Take-up Side Strong Braking
Notes:
1. Measure within 10 seconds after plugging in the
power cord and return shorted parts.
2. Check
strong
braking after checking
medium
braking.
e Checking
1. Remove cassette housing.
2. Unplug the power cord, and short pin (11) of the
system control board IC807 to GND.
3. Separate the reel idler from the take-up reel and
set the torque gauge.
4. Plug in the power cord.
5. Rotate the torque gauge slowly in the counter-
clockwise direction (about 1 turn every 2 to 3 se-
conds).
Check
that
the take-up
side
strong
braking torque is greater than 300 g.cm.
and
greater than twice the medium braking torque on
the supply side.
Counterclockwise
direction
Reel Idler
Reel Pulley
Take-up
Reel
Take-up Reel
=
Figure 20
14
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