JVC KD-21 - Page 12

No. 4150
KD-21A/B/E/U
KD-15A/B/C/E/J/U
Maintenance
Maintenance is important in obtaining trouble-free service
- life.
Do not forget cleaning and demagnetizing
Head cleaning
The heads which come in contact with the tape easily
attract
dust
and
magnetic
particles.
Be
sure
to
clean
them
after approx. 10 hours operation.
1. if the heads are dirty......
High frequencies are not obtained.
Sound becomes smaller. ) Clean the recording and erase
Recording is not possible.) heads.
Previous recording is not erased.=Clean the erase head.
2. Cleaning procedure
1)
Open
the
cassette
door.
Depress
the
PLAY
lever
to
move the head out. (The power switch should be in
the OFF position.)
2)
Use
the
head
cleaning
stick
provided
to
wipe
the
surface contacting the tape. (More effective cleaning
is obtained by moistening the cotton in alcohol.)
Cleaning pinch roller and capstan
The
pinch
roller
and
capstan
are
vitally
important
in
obtaining
stable
tape
movement.
Dirt
and
magnetic
particles
accumulating
on
these
parts
will
cause
unstable
tape
transport.
Clean them the same as the heads.
Cleaning procedure
1) Depress the PLAY lever, with the power switch set to
on, to permit movement of the pinch roller out and
allowing it to rotate.
2) Wipe the capstan and the pinch roller, which is rotating,
with a soft cloth (if moistened with alcohol, cleaning
will be more effective). Be careful of the position
when wiping off as they easily roll in the cloth.
© Do not use silicone or oil. Do not use hexane, carbon
tetrachloride or violent solution.
Cleaning the panel and external surfaces
© Wipe the panel and external surfaces with a cloth dipped
in a neutral cleaning solution or with a polishing cloth.
Demagnetizing
The heads are made from a material resistant to
magnetization, however, after long use they may become
magnetized. If noise seems to have increased, demagnetize
the heads with a head magnetizer available on the market.
© When damagnetizing the head (there is no need to
demagnetize the erase head), be sure to turn the power
switch off.
© A magnetic object (ex. magnetized screwdriver brought
into the vicinity can magnetize the heads and cause
excess noise. Be careful.
a iy eee