Mai Nt En A N C E; Preventi Ve M Ai N T En A N C E; C Lea N I N G; Vis U A L I N S Pe Ctio N - Tektronix 5440 Instruction Manual

M
AI NT EN A N C E
T
h
is sectio
n
of t
h
e ma
n
ual co
n
tai
n
s information for performi
n
g preve
n
tive maintena
n
ce,
troubles
h
ooti
n g, and corrective mai
n
tena
n
ce for t
h
is i
n
strume
n
t.
PREVEN
TI
VE M
AI
N
T
EN
A
N
C
E
P
reventive mainte
n
a
n ce consists of cleaning, visual ins
p
ection, lubrication, etc .
P
reventive
maintena
n ce performed on α regular basis may p revent i
n
strument brea
kd own and will improve t
h
e
reliability of t
h
e i
n
strume
n
t . T
h
e severity of t
h
e environme
n
t to w
h
ic
h
t
h
is instrume
n
t is sub
j
ected
determines t
h
e fre q uency of mai
n tenance . Α co
n
ve
n
ient time to perform preventive mai
n
tenance is
precedi
n
g ad
j ustment of t
h
e instrume
n
t .
CA
B
I
NE
T
REM
O
V
A
L
E
xterior
W A
RN
I
N
G
Loose dust accumulated on t
h
e front p anel ca
n
be
removed wit
h
α soft clot
h
or small b rus
h
. Dirt t
h
at remains
Dangerous voltages exist at several points
ca
n be removed wit
h
α soft clot
h
dampe
n ed wit
h
α mild
t
h
roug
h
out t
h
is instrument.
Wh
en t
h
e instrument is
detergent a
n d water solution . Abrasive cleaners s
h
ould
o
p
e r
ated wit
h
t
h
e covers remove
d
,
d
o not touc
h
n
ot be used .
ex
p
osed connections or com
p
onents . Some tran-
sisto
r
s have voltages present on t
h
ei
r
cases .
Interior
Disconnect power before cleaning theinstrumentor
re
p
lacing
p
arts .
Dust i
n
t
h
e i
n
terior of t
h
e instrument s
h
ould be
remove d occasionally due to its electrical co
nd
uctivity
u
n
der
h
ig
h
-
h
umidity co
n
ditio
n
s . T
h
e best way to clea
n th
e
T
h
e cabinet sides are
h
el
d
i
n p
lace by four latc
h
es . To
i
n
terior is to blow off t
h
e accumulate d d ust wit
h d
ry, low-
remove t
h
e cabi
n
et si d es, turn t
h
e latc
h
es 90 degrees an d
p ressure air. R emove any d irt w
h
ic
h
remai
n
s wit
h
α soft
pull t
h
e sides away from t
h
e carryi
n
g
h
a
n
dle ; t
h
e
n
, lift t
h
e brus
h
oraclot
h dampened wit
h
α mild deterge
n
ta
n
d water
cabi
n
et si d es away from t
h
e i
n
strume
n
t . T
h
e cabinet
solutio
n
. Α cotton-ti p
p
ed a
p
p licator is useful for cleaning
bottom is
h
el d in place wit
h
four latc
h
es a
n
d fo
u
r screws .
in
n
arrow spaces .
T
h
e cabi
n
et si d es
p
rotect t
h
is i
n
strument from dust i
n
Switc
h
Co
n
tacts
th
e interior, and also provi d e protection to p erso
nn
el from
Switc
h
contacts and pads are d esig
n
ed to o p erate dry
t
h
e o
p
erati
n
g voltages p rese
n
t . T
h
ey also reduce t
h
e
for t
h
e life of t
h
e switc
h
. H owever, as t
h
e switc
h
es are
n
ot
electromag
n
etic ra
d
iatio
n
from t
h
is instrument or in-
sealed, dust attracted to t
h
e contract area may cause
terference to t
h
e display due to ot
h
er equipment .
switc
h contacts to become electrically noisy . Cleaning
may be accomplis
h
ed by flus
h
i
n
g t
h
e contact area wit
h
iso p ropyl alco
h
ol or
k
elite (1 part
k
elite to 20 p arts water) .
C
LE
A
N
I
N
G
Do not use c
h
emical clea
n ing agents t
h
at leave α film or
t
h
at mig
h
t d amage p lastic p arts . Do
n
ot
u
se cotto
n
swabs
T
h
is i
n
strume
n
t s
h
ould be cleane d as often as
or similar a
p
p licators to apply clea
n
i
n g agents, as t
h
ey
o
p
erati
n
g conditio
n
s re
q
uire . Accumulation of d irt on
ten d to snag and leave strands of cotto
n
on switc
h
compo
n
ents acts as an ins u
lating blan
k
et a
nd p
reve
n
ts
contacts . S
h
oul d it become necessary to remove α switc
h
efficient
h
eat d issi
p
ation w
h
ic
h
can cause over
h
eating
for re p lacement or clea
n
ing, refer to Com
p
o
n
e
n
t R emoval
and com p o n
e
n
t brea
k
down .
and R eplaceme
n
t in t
h
is sectio
n
.
CA
U
TIO
N
V
IS
U
A
L
I
N
S
PE
CTIO
N
Section 4-5440
Avoid t
h
e use of chemical cleaning agents w
h ic
h
Th
is instr
u
me
n
t s
h
oul
d
be i
n
s
p
ecte
d
occasio
n
ally for
mig
h
t damage t
h
e p lastics used in this instrument . In suc
h
d efects as b ro
k
en connections, impro
p
erly seate
d
particular, avoid c
h
emicals t
h
at contain benzene,
semico
n
d uctors, d amage
d
circuit boar d s, an d
h
eat-
toluene, xylene, acetone, or similar solvents . damage d p arts .