30
27DV-S100
27DV-CS10
A
B
Master plane
Reel disk height
adjusting jig
Mechanism chassis
10 ± 0.2mm
Reel disk
Reel disk
Figure 1-7.
Torque gauge
CW
30mN·m (306gf·cm)
or more
Idler ass'y
The gauge is held at
its maximum value.
(Red mark)
Figure 1-8.
Torque gauge
30mN·m (306gf·cm)
or more
CCW
The gauge is held at
its maximum value.
(Red mark)
Supply reel disk
Idler ass'y
Figure 1-9.
Note:
Whenever replacing the reel disk, perform the height
checking and adjustment.
CHECKING AND ADJUSTMENT OF TAKE-
UP TORQUE IN FAST FORWARD MODE
• Remove the cassette housing control assembly.
• After short-circuiting R7057 and JUMPER:420
provided on the main PWB, plug in the power cord,
then turn on the power.
• Setting
1. Set a torque gauge to zero on the scale. Place it on the
take-up reel disk.
2. Press the FF button.
3. To calculate the remaining capacity of the play back
mode, slowly rotate the supply reel disk, and then shift
it into the forward mode.
• Checking
1. Turn the torque gauge slowly (one rotation every 2 to
3 seconds) by hand in the CW direction.
2. Make sure that the indication of torque gauge is not
less than 30mN·m (306gf·cm).
• Adjustment
1. If the FF winding-up torque is less than the specified
value, clean the capstan D.D. motor pulley, drive belt,
and limiter pulley with cleaning liquid, and check again.
2. If the torque is less than the set value, replace the reel
belt.
• Problems caused by maladjustments
1. Tapes may fail to be wound up near the FF end.
Notes:
1. Hold the torque gauge by hand so that it is not moved.
2. Do not keep the reel disk in lock state. Do not allow
long-time measurement.
5. CHECKING AND ADJUSTMENT OF
TAKE-UP TORQUE IN REWIND MODE
• Remove the cassette housing control assembly.
• After short-circuiting R7057 and JUMPER:420
provided on the main PWB, plug in the power cord,
then turn on the power.
• Setting
1. Set a torque gauge to zero on the scale. Place it on the
supply reel disk.
2. Press the rewind button.
3. To calculate the remaining capacity, slowly rotate the
take-up reel disk, and then shift it into the rewind mode.
• Checking
1. Turn the torque gauge slowly (one rotation every 2 to
3 seconds) by hand in the CCW direction.
2. Make sure that the indication of torque gauge is not
less than 30mN·m (306gf·cm).
• Adjustment
1. If the rewind winding-up torque is less than the speci-
fied value, clean the capstan D.D. motor pulley, drive
belt, and limiter pulley with cleaning liquid, rewind
again, and check the winding-up torque.
2. If the winding-up torque is still out of range, replace the
drive belt.
• Problems caused by maladjustments
1. Tapes may fail to be wound up near the REW end.
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