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MAINTENANCE
CLEANING
THE HEADS
To prevent
the loss
of high
frequency
response
or insufficient
erasure,
the heads
should
be cleaned
frequently.
Under
average
operating
con-
ditions,
cleaning
the heads
after
each
eight
to ten hours
of use
will
insure
against
the loss
of high
frequency
response.
To clean
the head,
moisten
a clean,
lintless
cloth with carbon tetrachloride,
alcohol.
Carefully
wipe the face
of each
head
and the
tape
guides
to remove
all
traces
of dirt
and magnetic
oxide
deposits.
DEMAGNETIZATION
The
tape heads
should
be demagnetized
occasionally
with
a head demag-
netizer
to maintain
the best
possible
performance
of the equipment
and
to prevent
the possibility
of gradual
deterioration
of your
recorded
tapes.
CAUTION:
Do not allow the demagnetizer
to come
in close
proximity
with the level
indicator
meter,
as permanent
damage to the
meter
may result.
.
Demagnetizing:
To demagnetize
the heads,
use
a two-pole
type
of demagnetizer,
with
a
piece
of ordinary
splicing
tape
over
the tips.
With
the power
com-
pletely
removed
from
the recorder,
gently place
the protected
tips
against
the upper
pole-pieces
of the first
head.
Then slowly move
the
tips downward
toward
the lower
pole-pieces
of the head.
Alternate
between
the two sets
of pole-pieces
while
slowly withdrawing
the de-
magnetizer.
Repeat
this process
for each
of the heads.
Do not remove
the power
from the demagnetizer
until
it is at least
2 feet
away
from
the
recorder.
a-33 =
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