Sharp VC-MH80 - Page 15

VC-MH80
VC-MH90
l Check that the reel disk is lower than par-t A but
higher than part B; If~the height is not correct,
readjust the reel disk height by changing the
poly-slider washer under the reel disk.
Note :
Whenever replacing the-reel disk, perform the
height checking and adjustment.
Master plane] p 6 !$$~~g~~gh’
, ,‘,
1
,--.--Z.C~i;~-’
10f 0.2mm
1 Reeldisk 1
I
[Mechanism chassis
Figure 4-7.
CHECKING AND ADJUSTMENT OFTAKE-UP
TORQUE IN FAST FORWARD MODE
l
Remove the cassette housing control assembly.
0
a
1.
2.
0
1.
2.
Make a short-circuit between TP5001 and
TP5002, both located on the timer PWB. Now
turn on the power.
Setting
Set a torque gauge to zero on the scale. Place it
on the take-up reel disk.
Press the FF button to set the mechanism to the
fast forward mode.
Checking
Turn the torque gauge slowly (one rotation
every 2 to 3 seconds) by hand in the take-up
direction.
Check to see if the take-up torque is higher than
69 mN-m (70Qgf-cm).
Torque gauge
\
69mN-m (700gf.cm)
or more
I
1 Thegauge is held at
I
I its maximum value.
(Red mark)
3
l Adjustment
1. If the take-up torque is outside the range, clean
the capstan D.D. motor pulley, reel belt and reel
pulley with cleaning liquid, then recheck the
torque.
2. If the take-up torque is still out of range, replace
the reel belt.
Notes:
1. Hold down the torque gauge so that it may not
fly off.
2. When checking the take-up torque, do not keep
the reel disk locked for a longer time.
CHECKING AND ADJUSTMENT OF TAKE-UP
TORQUE IN REWIND MODE
l Remove the cassette housing control assembly.
l Make a short-circuit-between TP5001 and j
TP5002, both located on the timer PWB. Now
turn on the power.
0 Setting
1. Set a torque gauge to zero on the scale. Place it
on the supply reel disk.
2. Press the REW button to set the mechanism to ’
the rewind mode.
l Checking
1. Turn the torque gauge slowly (one rotation
every 2 to 3 seconds) by hand in the take-up
direction.
2. Check to see if the take-up torque is higher than
69 mN-m (700 gf-cm).
Torquegau
69mN.m (700gfqcm)
its maximum value.
Figure 4-9.
Take-up direction
Figure 4-6.
15