Radio Shack TRS-80 Manual page 15

CARE
AND
MAINTENANCE
Caution
•
Do
not use organic solvents or alcohol
when
cleaning the cover.
•
Never operate
Printer
when
upper
plastic
cover
is
opened
because
this
is
very dangerous.
•
When
replacing
a fuse,
be
sure to use
the
same type and
rating
(3A 250V).
• Never
set
the printer
where
it is
exposed
to
direct sunlight.
• Set
the printer
on
a
strong secure stand secure to prevent
it
from
vibrating
while
printing.
Maintenance
(Refer to
Fig. 10)
•
If
the print
head
becomes clogged with ribbon material or
paper
lint,
carefully
remove such
ma-
terial
with
a finely
pointed tool (needles,
etc.).
This should be
checked
regularly.
•
Lightly
oil
the
two
carriage
guides every three
months. Use high-grade ester lubricating
oil,
but
it
not
available,
use high-grade
sewing machine
oil.
Lubricate carriage
guide
(1)
by
directly oiling
the
oil
ring (felt)
installed
in a
4-mm
hole
in
the carriage.
Lubricate carriage
guide
(2)
directly
at
the
oil
ring
in
carriage.
• Lubricate platen
revolving shaft
(3),
wire pulley shaft
(4),
and
ribbon feed
revolving shaft
(5),
gear revolving shafts
(6),
and
tractor unit
sprocket
revolving bearing
(7)
every three
months. Use
molybdenum
disulfide
compound
for lubrication.