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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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