Sharp VC-90ET

_
Remove
the
cassette
housing
control
assembly.
2.
Place
the
mechanism
in
the
stop
mode
by
unplugging
the
power
cord
in
the
fast
forward
or
rewind
mode.
3.
Slowly
rotate
the
torque
gauge
in
the
clockwise
(CW)
direction
and
counterclockwise
(CCW)
direction
of
the
supply
brake
so
that
the
reel
disk
and
the
indicator
of
the
torque
gauge
rotate
at
an
equal
rate.
Check
that
the
values
are
within
the
range
of
CW
direction
=
280
to
720
g.
cm,
CCW
direction
=90
to
230
g.cm,
and
that
the
brake
torque
in
the
CW
direction
is
at
least
twice
as
high
as
that
in
the
CCW
direction.
_
©
Checking
the
brake
torque
at
the
take-up
side
Torque gauge
Adjust the idler gear
in the center
>),
Take-up
reeldisk
Ley,
CCW:
280-720
g-cm
CW:
90-230g-cm
Mechanism
chassis
Figure 1-44.
.
Remove
the
cassette
housing
control
assembly.
2. Slowly rotate the torque gauge in the clockwise
(CW) direction and counterclockwise (CCW)
direction
of
the
take-up
brake
so
that
the
reel
disk and the indicator of the torque gauge
rotate at an equal rate. Check that the values
are within the range of CCW direction= 280 to
720 g. cm, CW direction =90 to 230 g.cm, and
that the brake torque in the CCW direction is at
least twice as high as that in the CW direction.
_
@ Adjustment of the brake torque at the supply
side and the take-up side
1. If the supply or take-up brake torque is outside
the range, clean the supply or take-up reel disk
break lever felt, then recheck the torque.
2. \f the supply or take-up brake torque is still
outside the range, replace the main brake or the
main brake spring.
Back
tension
lever
spring
VC-9OET
REPLACEMENT
OF
MAIN
BRAKE
1.
Remove
the
reel
belt
and
the
reel
block
FFC.
(Full
Flat
Cable)
:
2.
Remove
the
cut
washer
©
off
the
brake
shifter.
3.
Unscrew
the
four
screws
@
and
then
the
take-
up
reel
retainer.
_
Remove
the
reel
block
assembly
@
downward.
_
Remove
the
cut
washer
@
first
and
then
the
reel
pulley.
_Unscrew
the
two
screws
@
and
detach
the
idler
assembly.
Unhook
the
back
tension
lever
spring
©
and
-remove
the
back
tension
lever
@.
(Undo
the
hook
under
the
reel
chassis.)
8.
Open
the
shifter
latch
@
and
remove
the
brake
shifter
assembly
®.
9.
Release
the
reel
disk
catches
@and
then
remove
the
left
and
right
reel
disk
assemblies
@
and
©.
10.
Finally
remove
the
main
brake
levers
@and
the
main
brake
spring
@.
N OM ws
Take-up
reel
retainer
t
1 he
1 Back
| tension SY S$ TSS :
,lever ¢
(31) Main
lever
k .
Shifter RSLS
latch =|. ,
! C2
Reet
—((
NUD
3
ee
iS
Sn aid
t pulley =
Pee Wee da ann wide TE ote nn Cat washer Reel block ass’y
Figure 1-45.
Note:
When the main brake is replaced, perform the
height checking and adjustment (See page 14), and
the brake torque checking (See page 20).
21
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