Sharp VC-780E

)
aaa!
is
/
7
a i, ee
Tension
pole
Pinch
roiler
Capstan shaft
Cassette
positioning pin
Cassette lamp
Take-up reel disk
Reel disk height
:
.
adjusting
screw
Reel
disk
height
adjusting
jig
Cassette
lock
Reel
disk
height
release
shaft
adjusting screw
(a) top view
Reel
disk
height
adjusting
jig
ULL,
i.
Master
plane
jig
:
Supply
reel
disk
.
tb} side view
Figure 1-9.
CHECKING
AND
ADJUSTMENT
OF
TAKE-UP
TORQUE
IN
FAST-FORWARD
MODE
Notes:
1,
Torque gauge
Torque gauge head
Take-up reel disk
When
setting
the
torque
gauge
on
the
take-up
reel
disk
and
pushing
the
fast-forward
button
to
start
the
reel
disk
turning,
take
care
that
the
torque-gauge
does
not
fly
off.
_The
checking
and
adjustment
should
be
carried
out
without
a
video
cassette
tape
in
place.
Checking
_
Remove
the
cassette
housing
assembly.
_
Place
the
torque
gauge
on
the
take-up
reel
disk
and
push
the
fast-forward
button
to
place
the
unit
in
the
fast-forward
mode.
_
Turn
the
torque
gauge
slowly
(one
rotaion
every
2
to
3
seconds)
by
hand
in
the
take-up
direction
and
check
that
it
indicates
700
g.cm
or
more.
Take-up reel disk
Idler gear
Reel pulley
(center gear)
{a)
side
view
(b}
top
view
Figure 1-10.
13
, Vu-# GU
VC-790ET
e Adijustment
If
the
take-up
torque
is
outside
the
specified
range,
clean
the
capstan
D.D.
motor
pulley,
reel
belt
and
reel
pulley
with
cleaning
liquid,
then
recheck
the
torque.
if
the
take-up
torque
is
still
out
of
specification,
replace
the
reel
belt.
CHECKING
AND
ADJUSTMENT
OF
TAKE-UP
TORQUE
IN
REWIND
MODE
Notes:
1.
When
setting
the
torque
gauge
on
the
supply
ree|
disk
and
pushing
the
rewind
button
to
start
the
reel
disk
turning,
take
care
that
the
torque
gauge
does
not
fly
off.
.
2.
When
checking
the
take-up
torque,
do
not
keep
the
ree!
disk
locked
for
a
longer
time.
e
Checking
;
_
Remove
the
cassette
housing
assembly.
_
Place
the
torque
gauge
on
the
supply
reel
disk
and
push
the
rewind
button
to
place
the
unit
in
the
rewind
mode.
be
8
3.
Turn
the
torque
gauge
slowly
(one
rotatio
every
2
to
3
seconds)
by
hand
in
the
take-up
direction
and
check
that
in
indicates
700
g.cm
or
more.
BN) —
® Adjustment
If
the
take-up
torque
is
outside
the
specified
range
clean
the
capstan
DD
motor
pulley,
reel
belt
and
reel
pulley
with
cleaning
liquid,
then
recheck the torque.
If
the
take-up
torque
is
still
out
of
specification,
replace the reel belt.
Supply reel disk
Torque gauge
Torque gauge
head
Take-up
reel disk
Reel pulley
(center gear)
(a)
side
view
ib}
top
view
Figure 1-11.
CHECKING
OF
TAKE-UP
TORQUE
IN
PLAY-
BACK
MODE
e@ Checking
Load
a
cassette
torque
meter
(JiGVHT-063)
into
the
unit
and
push
the
record
button
to
place
the
unit
in
the
record
mode.
Then
check
that
the
torque is as specified;
torque: 95 + 30 g.cm