Tektronix 2235 User Manual

M aintenance-2235 Service
P reventive maintenance consists of cleaning,
visual
inspection, lubrication, and c hecking instrument p erform-
ance .
When
accomplished regularly, it may p revent instru-
ment malfunction and enhance instrument reliability . The
severity of the environment in which the instrument
is used
determines the required frequency of maintenance . An
appropriate time to accomplish preventive maintenance is
j ust before instrument adjustment .
G
ENER A L
CA RE
To
preve n t getting
moisture insi d e t he i n str u mentdu r -
The cabinet minimizes
accumulation of dust inside the

ing exter n al
cleaning, use only enoug h li qu i d to dam p
instrument and should normally
be
in p
lace when operating

e n t he clot h or
applicator .
t
he oscilloscope .
The
optional front-panel cover p rovides
both dust an d damage p rotection for the front panel and crt
face, and it
should b e
in
place whenever the instrument is

C LEANING
.
L
oose dust on the outside of the instrument
stored or
is
being
transported .

can be removed with
α soft cloth or small soft-bristle brush .
The brush in p articularly
u seful for dislodging dirt on an d
around the controls and
connectors . Dirt that r emains can
I NSPECTION A
ND CLEANING

be removed with α soft cloth d
am
p
ened in α mild detergent-
and-water solution .
Do not use abrasive cleaners . Clean t he
The instrument should be visually
inspected and cleaned

light filter and the crt face with
α soft lint-free cloth damp-
as often as operating conditions r
e q uire . Accumulation of

ened with either denatured alcohol
or α mild detergent-and-
dirt in t he instrument can cause overheating
and component

water solution .
breakdown . Dirt
on components acts as an insulating
blanket, p reventing efficient
heat dissipation . It also
p rovi d es an electrical conduction path that
could result in

I nterior
instrument failure, especially under h igh-humi
d ity conditions .

To gain access to internal p
ortions of the instrument for
ins p ection and cleaning, refer to the "Removal
and Re p lace-
ment Instructions" in the "Corrective M
aintenance" part of
this section .
6-2
PREVEN TI VE
M AI N T EN A N C E
I N T R OD U CTIO N
E xterior
I NSPECTION . Inspect the
external p ortion of the instru-
ment for damage, wear, and missing p
arts ; use Table 6-2 as
α guide . Instruments that appear
to
h
ave b een dropped or
otherwise abused should b e checked
thoroughly to verify
correct operation and p
erformance . Deficiencies found that
could cause p ersonal injury or
could lead to further d amage
to the instrument should be repaired
immediately .
CA U TIO N
CA U TIO N
I
NSPECTION . Inspect the internal p
ortions of the
instrument
for damage and wear, using
Table 6-3 as α
Avoid t h
e use of c h emical clea n ing
agents w h ic h

gui d
e . Deficiencies found should be
re p aire d imme d iately .
mig h t
damage t he plastics used in t h
is instrume n t .

The
corrective p rocedure for most visible
defects is obvious ;
U
se α nonresi du e-type cleaner, p refera
b
ly
iso p ropyl

h owever, p
articular care must be taken if
heat-damaged
alcohol, denatured et h yl
alcohol, or α solution of 5%

components
are foun d . Overheating usually in
d icates other
mild
detergent wit h 95% water . B
efo r e using any

trouble in the instrument ; therefore, it is
important that the
ot h
er
ty p
e of cleaner, consult yo u r
Te k t r onix Service

cause
of overheating be corrected to p
revent recurrence of
Center or
rep
r
esentative .

t he
damage .
REV ΜΑΥ 1983

Tektronix 2235 Specifications

General

Brand	Tektronix
Model	2235
Category	Test Equipment
Language	English