Preventive Maintenance; Maintenance; Fan Motor - Tektronix 545A Instruction Manual

PREVENTIVE
MAINTENANCE
Air
Filter
Care
must
be
taken
to assure
free ventilation of the
T/pe 545A
inasmuch
as
some
of the
components
are oper-
ated
at dissipation levels such that excessive
interior tem-
peratures
will result
without
adequate
air circulation.
To
assure
free
passage
of
air
the instrument must be placed
so that the
air intake
is
not blocked
and
the
filter
must be
kept
clean.
Moreover,
the side panels
and
bottom cover
must be
in
place
for
proper
air circulation.
Do
not
remove
covers except during maintenance.
A
washable EZ
KLEEN
filter
is
used
at the
air intake
port of the instrument.
Under
normal operating
conditions
the
filter
should
be
inspected
and
cleaned
if
necessary
every three
to four
months.
More
frequent
inspection
is
required
when
the operating
conditions are
more
severe.
The
following cleaning
instructions
are
issued
by
the
filter
manufacturer:
(1)
If
grease
or
dirt
load
is
light,
remove
filter
from
installation
and
rap
gently
on hard
surface
to
remove
MAINTENANCE
loose
dirt. Flush
remaining
dirt
or grease
out of
filter
with a stream
of
hot
water
or steam.
(2)
If
load
is
too heavy
for
treatment described
in
(1),
prepare
mild soap
or detergent
solution
in
pan
or
sink
deep enough
to
cover
filter
when
laid
flat.
Agi-
tate
filter
up
and down
in
solution
until
grease or
dirt
is
loosened
and
floated
off.
(3)
Rinse
filter
and
let
dry.
(4)
Dip
or spray
filter
with
fresh
Filter
Coat
or
Handi-
Coater.
These products are
available
from
the
local
representative of the Research Products Corporation
and
from most
air conditioner
suppliers.
Fan Motor
The
fan
motor
bearings should be
lubricated every three
or four
months
with a
few
drops
of
light
machine
oil (see
Fig. 5-1).
Failure to lubricate the bearings periodically
will
cause the fan
to
slow
down
or stop thereby causing the
instrument to
overheat.
If
your oscilloscope
is
equipped
with a dc fan
motor
—
modification
number
101
—
and
if
Fig.
5-1. Location of the fan
motor
lubrication points.
5-1