Sharp VC-780E - Page 15

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Hook the tension gauge
adapter around the shaft
Pinch roller
Pinch roller lever
(a) top view
Capstan shaft
Tension gauge
Pinch roller
Pinch roller shaft
Pinch roller lever
(b} side view
Figure 1-13.
ADJUSTMENT
OF
TENSION
POLE
@
Position
checking
(Fig.
1-14)
1.
Remove
the
cassette
housing
assembly.
2.
Set
a
video
cassette
tape
and
push
the
record
button
to
place
the
unit
in
the
record
mode.
3.
The
pole
bases
(see
page
4;
item
19
and
27.)
operate
to
bring
the
tape
outside
the
cassette
housing
and
simultaneously
the
tension
pole
moves
to
the
left,
loading
the
tape.
At
that
time
(loading
mode),
check
the
position
of
the
tension
pole.
Supply impedance roller
Hexagon nut
Tension pole
Tension arm
Supply-eel disk
@ Tension band
contro! bracket
@) Screw
Tension band
Figure 1-14.
15
VC-7390ET
4.
At
the
top
of
the
tape
(E-180),
check
that
the
tension
pole’s
center
is
aligned
with
the
supply
impedance
rofler's
center.
5
Check
that
the
tape
is
neither
curled
against
the
flange
of
the
supply
impedance
roller
nor
mounted
over
it.
6.
During
the
video
search
rewind
mode
with
no
cassette
tape
in
place,
check
the
supply
reel
disk
is
free
of
the
tension
band.
-
@
Position
adjustment
(Fig.
1-15)
_1.
If
the
tension
pole
is
at
the
right
of
the
supply
impedance
roller's
center,
shift
the
tension
band
control
bracket
@
in
the
direction
of
arrow
>
®
_and
tighten
the
screw
@.
2.
If
the
tension
pole
is
at
the
left
of
the
supply
impedance
rofler's
center,
shift
the
tension
band
control
bracket
in
the
direction
of
arrow
>
©
_and
tighten
the
screw
@
.
ADJUSTMENT
OF
RECORD/PLAYBACK
BACK
TENSION
@ Checking
1.
Remove
the
cassette
housing
assembly.
2.
Put
a
torque
cassette
meter
into
the
unit.
3.
Push
the
record
button
to
place
the
unit
in
the
record
mode.
Check
that
the
reading
of
the
cassette
meter
is
23
to
28
g.cm.
4.
Make
sure
the
video
cassette
tape
is
wound
over
the
retaining
guide.
5.
Make
sure
that
the
tape
is
not
slack
nor
damaged
at
both
ends.
® Adjustment (Fig. 1-15)
1.
If
the
back
tension
is
lower
than
specified,
move
the
tension
spring
hook
plate
@
in
the
direction
of
arrow
®
so
that
the
protuberance
behind
be
tight
in
the
hole.
2.
If
the
back
tension
is
higher
than
specified,
move
the
tension
spring
hook
plate
@
in
the
direction
of
arrow
©
so
that
the
protuberance
behind
be
tight
in
the
hole.
Tension spring
Main chassis
Tension. spring
hook plate
Figure 1-15.