Sharp VC-M23SM Servicehandbuch Seite 14

¢ Check that the reel disk is lower than part 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, neiaan the height checking
and adjustment.
a. Reel disk height
Master plane
. adjusting jig
c a n m a n i g e l peers lero
10+0.2mm| | Reel disk Mecris nisi) chase
MEY
Reel disk|
Figure 4-7.
Remove the cassette housing control ane
e Make a short-circuit between TP5005 and TP5006, both
located at the left on your: side on the main PWB. Now 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 to set the mechanism to the fast forward
mode.
3. To calculate the remaining capacity of the play back made,
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 take-up direction.
2. Check to see if the take-up torque is higher than 69 mN-m (700
gf-cm).
Torque gauge
69mN-m(700gf-cm)
or more
The guage is held at
its maximum value.
(Red mark)
Idler gear ier direction
Figure 4-8.
14
2+ Be 7 oa if - Tal vats
ings meade : woke a we ores)
. lf the take-up torque is outside the. range; clean. the: capstan
D.D. motor pulley, 'drive 'belt and limiter pulley, with leaning
liquid, then recheck the torque. :
2. Ifthe take-Up torque is still out of rarige, replace tt the drive belt.
Notes:
Te "Hold down, the torque gauge so that it may not fly off,
9. When checking the take-up torque, do not keep the "Bal disk
. _locked for a longer time.
CHECKING AND ADJUSTMENT OF TAKE- UP
TORQUE IN REWIND MODE |
* Remove the cassette housing control assembly...
e Make a short-circuit between TP5005 and TP5006, both
located at the left on your side on the main PWB. Now turn
on the power.
¢ Setting
1. Seta torque gauge to zero on me Scale. Place it on the Supply
reel disk.
2. Press the REW button to set the ragananien to the rewind
mode. :
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 take-up direction.
2. Check to see if the take-up torque is higher than 69 mN-m (700
gf-cm).
Torque gauge
69mN-m (700gf-cm)
or more
The gauge is held at
its maximum value.
(Red mark)
Figure 4-9.