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Sharp VC-90ET - Page 30

Sharp VC-90ET
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VC-90ET
@
Reassembly
1.
Set
the
new
drum.
2.
Place
the
relay
PWB
as
shown
in
the
figure
and
solder
it
securely.
Notes:
1)
Before
setting
the
drum,
make
sure
that
there
is
No
scratches
or
dust
on
the
end
surface
and
circumference
of
the
disk.
2)
Before
setting
the
drum,
make
sure
that
there
is
no
scratches
or
dust
on
the
internal
surface
and
end
surface
of
the
upper
drum.
Install
the
upper
drum
onto
the
disk
with
such
care
that
the
upper
drum
is
not
tilted.
4)
When
reassembling
these
parts,
do
not
allow
dust
and
dirt
to
come
between
the
disk
and
the
upper
drum.
5)
Do
not
use
excessive
force
when
driving
in
the
screws.
1.
Fasten
the
upper
drum
in
place
with
the
two
setscrews.
2.
Solder
the
leads
quickly
and
carefully
without
touching
adjacent
patterns.
3.
Finally
be
sure
to
check
the
tape
drive
train
adjustment
and
the
following
electrical
adjustments.
*
Adjustment
of
the
playback
switching
point
*
Checking
and
adjustment
of
the
X-position
*
Adjustment
of
SP
and
EP
slow
tracking
preset
3
—
Figure
1-76.
REPLACEMENT
OF
D.D.
MOTOR
1.
2.
WAaWN
setscrew
D.D.
stator
ass‘y
(+)
i
7
Put
the
unit
in
the
eject
mode.
Unplug
the
power
cord
from
the
wall
socket.
Removal
(Follow
the
order
of
the
indicated
numbers.)
(Reverse
the
order
in
reassembly.)
.
Remove
the
FFC.
.
Remove
the
D.D.
rotor
assembly
setscrews.
.
Pull
out
the
D.D.
rotor
assembly.
.
Remove
the
D.D.
strator
assembly
setscrews.
.
Pull
out
the
D.D.
stator
assembly.
f°
D.D.
rotor
assy
setscrew
==
eS
Installation
positioning
hole
D.D.
rotor
ass’y
C)
Frc
(Full
flat
cable)
Figure
1-77.
1)
When
removing
the
D.D.
rotor
assembly
and
the
D.D.
stator
assembly,
use
care
not
to
hit
them
against
the
loading
relay
gear.
2)
Match
the
positioning
hole
in
the
D.D.
rotor
N
assembly
and
that
in
the
lower
drum
assembly
with
each
other
and
secure
them
together.
otes:
1)
Be
careful
not
to
damage
the
upper
drum
and
the
video
head.
2)
Be
careful
not
to
give
impacts
to
the
Hall
element,
D.D.
stator
and
D.D.
rotor
assemblies,
and
other
component
parts.
3)
After
installation,
adjust
the
playback
switching
point.

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