Sharp VC-384N Serviceanleitung Seite 8

HEIGHT CHECK AND ADJUSTMENT
1) Remove the cassette housing. Set the master plane in
the mechanism as shown in Figure 6(a). Use care so that
the master plane should not contact the drum.
2) Using the reel disk height adjusting jib, check if the top
of the reel disk is lower than A and higher than B (see
Figure 6(b)). If the height is wrong, make adjustment
with height-adjusting washer(s).
Vertical play should be 0.1 — 0.5mm finally.
Caution: After reel disk replacement, be sure to check
and adjust its height.
Pinch roller
_- Capstan shaft
Pinch roller lever shaft
f=— Cassette lamp
Tension pole
Positioning pin
Take-up reel disk
Cassette unlock shaft
Reei disk height adjusting jig
Figure 6(a).
Reel disk height
adjusting jig
Master plane
cree «Sk 0
ZZ 5
Adjusting washer 3,1W5,4 < 0,26
Figure 6(b).
FAST-FORWARDING/WINDING TORQUE CHECK
AND ADJUSTMENT
Precautions:
1. Use care so that the torque gauge mounted on the
reel disk should not be driven away when the reel
disk starts to run with the fast-forward button
depressed.
2. Do not load any video cassette tape in this case.
@ Checking Procedure
1) Remove the cassette housing. Hold the cassette
down switch with PVC tape.
Take-up reel disk
Torque gauge Reel idler |
me
Torque gauge head
Take-up reel disk
Figure 7(a). Figure 7(b).
2) Mount a torque gauge on the take-up reel disk.
Depress the fast-forward button.
3) Turn the torque gauge slowly (once for every 2-3
seconds) by hand for tighter torque. With a torque of
more that 800g-cm, check that there is no slip
between the reel idler and the reel motor pulley or
take-up reel disk.
@ Adjustment
If fast-forwarding torque is not as high as specified,
clean the reel motor pulley, reel idler, and take-up reel
disk with the cleaning liquid then check torque again.
REWINDING/WINDING TORQUE CHECK
AND ADJUSTMENT
Precautions:
1. Use care so that the torque gauge mounted on the
reel disk should not be driven away when the reel
disk starts to run with the rewind button depressed.
2. Do not load any video cassette tape in this case.
@ Checking Procedure
1) Remove the cassette housing. Hold the cassette
down switch with PVC tape.
2) Mount a torque gauge on the supply reel disk. Then
depress the rewind button.
3) Turn the torque gauge slowly (once for every 2-3
seconds) by hand for tighter torque. With atorque of
more than 800g-cm, check that there is no slip
between the reel idler and the reel motor pulley or
supply reel disk.
Supply reel disk
Reel motor
pulley
Reel ider
Torque gauge head
Supply reel disk
Figure 8(b).
Figure 8(a).
@ Adjustment
If rewinding/winding torque is not as high as ecified,
clean the reel motor pulley, reel idler, and supply reel
disk with the cleaning liquid then check torqueagain.