,-
F Maintance
Schedule
In
order to maintain optimum
performance
and to
protect
the recorder
agalnst damage, the following
malntenance
schedule should be
adhered
to rigerously. The
servicing
lntervals
quoted
in the fo1-
lowing
are
based on the
assumption
that
the
recorder will
be operated eight to ten hours
a day and
they should be regarded
as
maker's recommendations.
It
may be desirable to
alter
the
servlce in-
tervals depending onthe
amount and
type of the use
the
machine has
been subjected to.
Every l0 hours of operation
cleaning
the heads
Uslng a soft llnen cloth, clean the head faces
and
re-
move
any
hardened deposlts wlth ethylene-trlchloride.
If
very high
quality
tapes
are used thls operation may
be carrled out Iess frequently.
Every 50 hours of operation
de-magnetize heads and all steel
parts
in the tape
path
CIean
rubber
plnch-roller
Cleaning the capstan
Every 300 hours
of operation
check
amplifiers and azimuth
Every 1000 hours of operatlon
Test the brakes
Test the
pinch-roller
Oiling
the tape lift mechanlsm
De-magnetize the heads
and aII steel
parts
in the
tape
path
by means of
a suitable
de-fluxer.
If a brown deposit has
formed
on the
pinch-roller,
the
wheel
should
be dismantled
and cleaned with ethvlene-
trichloride.
Important
I It is essential to remove the
pinch-
roller for cleaning to
avoid
damaging
the
grease
under
the
plastic
cap of the capstan or the
paint
on the
recorder.
During the first weeks of operatlon
gnease
might ooze
from
the
plastlc
cap. This
should
be carefully removed
wlth a soft linen cloth; hardened
deposits shouid be
removed
wlth an
India-rubber
-
never
use anv hard
instruments.
See under E
"Alignment
procedures"
-
as under C 2
-
as
under C
6
Place
a
few
drops
of
parts.
I
"Teresso
43" oil on the moving
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