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JVC CD-1770 - Maintenance; Cleaning; Demagnetizing

JVC CD-1770
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Maintenance
To
get
long,
trouble-free
service,
maintenance
is
important.
Do
not
forget
cleaning
and
demagnetizing.
Cleaning
After
long
use,
the
heads
and
tape
part
—
capstan,
pinch
roller,
etc.
—
will
become
dirty
with
dust
or
magnetic
particles.
Dirty
heads
cause
imperfect
erasing
or
high
frequency
drop-off.
A
dirty
capstan
and
pinch
roller
will
cause
unstable
tape
speed,
leading
to
increased
wow
and
flutter.
Always
keep
them
clean
by
following
the
procedure
below.
1.
Heads
1)
Press
the
EJECT
button
with
the
POWER
switch
OFF
to
open
the
cassette
door.
2)
Remove
the
headcover
upward.
3)
Press
the
PLAY
button
to
move
the
heads
out.
4)
Use
the
head
cleaning
stick
provided
to
wipe
the
surface
where
the
tape
comes
into
contact
with
the
head.
(It
is
effective
to
moisten
the
cotton
with
alcohol.)
ee
|
Pinch
roller
Erase
head
Recording/playback
head
©
Fig.
9
~13—
2.
Pinch
roller
and
capstan
1)
Press
the
EJECT
button
with
the
POWER
switch
ON
to
open
the
cassette
door.
2)
Press
the
PLAY
button, and
the
pinch
roller
will
move
out
and
rotate.
3)
Apply
a
soft
cloth
(soaked
in
alcohol,
it
will
be
more
effective)
to
the
rotating
pinch
roller
and
capstan.
Be
careful
not
to
let
the
cloth
get
caught!
*
Do
not
use
any
cleaner besides
alcohol
or
a
specifically
prepared
tape
head
cleaning
solution.
/
Mee
ea
Sy
Soft
cloth
eo
Direction
of
rotation
Vv
}
Pinch
roller
a
of
pinch
roller
3.
Cabinet
When
the
cabinet
becomes
dirty,
wipe
it
with
a
soft
cloth
soaked
with
a
neutral
cleaning
solution
of
a
polishing
cloth.
*
Do
not
use
thinner
or
benzine.
Demagnetizing
The
heads
are
made
from
a
material
resistant
to
magnetization,
but
after
long
use
they
may
become
magnetized.
A
magnet
brought
into
their
vicinity
can
magnetize
the
heads,
causing
excess
noise.
If
noise
seems
to
have
increased,
demagnetize
the
heads
with
a
head
demagnetizer
through
the
following
procedure.
1.
Turn
the
POWER
switch
OFF.
2.
Wrap
the
tip
of
the
demagnetizer
with
vinyl!
tape
or
soft
cloth
so
as
not
to
damage
the
head
surface.
Switch
on
the
demagnetizer
and
bring
it
close
to
the
head.
3.
Move
the
tip
of
the
demagnetizer
slowly
first
to
the
left
and
right,
then
up
and
down
in
front
of
the
head.
Gradually
move
it
away
from
the
head
and
switch
it
off
at
a
distance
of
more
than
30cm.
(12’)
4.
The
erase
head
need
not
be
demagnetized.
The
capstan
shaft
and
tape
guide
should
be
demagnetized
in
the
same
way
as
the
record/playback
head.
*
Do
not
bring
a
magnetized
metallic
object
(a
screwdriver,
for
example)
near
the
head
as
this
will
increase
noise.
CD-1770/A/B/C/E
No.
4144

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