T R O Uble S H Ooti N G Aids; Corrective M Aintena N Ce - Tektronix 5440 Instruction Manual

M
aintena
n
ce-5440
M
ulti-
P
i
n
Connector Identificatio
n
M
ulti-
p
i
n
connectors mate wit
h
grou
p
s of pins soldere d
to ci
r
cuit boards .
P
in number 1 is i
nd
exed wit
h
α triangular
mark on the circuit board an d molde
d
on th e h
ol
d
er of t he
mu lti- p in co nn ector, as sh ow n in F ig . 4-3.
In terface Connector P
in
L
ocations
Th e Interface circuit boar d coup les the p
lug-in unit to
the associated mainframe (oscillosco pe) . F ig . 4-4 iden-
tifies the p i n s on th e interface co nnector as shown on the
main Interface
d
iagram in the Diagrams sectio n .
4-4
0995-11
F
ig . 4-3.
M
ulti-pin connector
h
ol der or ientation.
Descri ption :
V
oltmeter, 10 mego h m inp ut im p eda n ce
an
d
α ra n ge of 0 to at least 50 volts dc ; accuracy, with i n
0.1 ο/ο . Oh mmeter, 0 to 20 mego h ms . Test probes should be
P
erformance Check insulate
d
to prevent acci dental s h o rti n g .
The Performance C h ec k p rocedure, give n
i
n Sectio n 2
of this manual, pr ovides α quic k and convenient means of
chec ki ng instrument operatio n. In some cases, minor
troubles may be revealed or correcte
d
by adj ustme n t.
T
R
O
UBLE S H OOTI
N
G
E
Q
U
I
PMEN
T
Th e followi ng eq ui
p
ment, in ad
d
ition to that listed i n
t
h e
Performance Chec k sectio n is
u
seful for troubleshooting .
Transistor Tester
Descri ption : Dynamic-ty pe tester .
Pur
p
ose: Test semico n ductors.
R ecomme ded Te ktronix types: 576 Curve Tracer,
577/177 Curve Tracer system, 7CT1 N Curve Tracer unit
a nd α 7000-series oscillosco
p
e system, or α 5CT1 Ν Curve
Tracer u n it an d α 5000-series oscillosco pe .
F
ig . 4-4 . Locatio n of pi n num bers on Inte rface co nnecto r.
M
ultimeter
Pur p ose : C h ec k voltage an
d
resistance .
Test Oscillosco
p
e
Descri ption: Fre que n cy resp o nse, d o to 50 mega hertz
mi nimum ; deflection factor 1 millivoltto5volts/division .A
10 Χ, 10 mego h m voltage
p
robe should be use
d
to re d uce
circuit loading .
Pur pose: C hec k operating waveforms.
T
R
O
UBLE
S
H
OOTI
N
G T
E
C
HN
IQ
UE
S
Th e following troubles h ooti ng
p
roce
d
ure is arranged
to chec k
t
he simple trouble
p
ossi bilities before
p roceeding with extensive troubles h ooti ng . T h e first few
chec k s e n sure proper connection, operatio n , a n
d
ad just-
me nt. If the trouble is
n ot located by t h ese c h ec k s, the
remaining steps ai
d
in locating the defective component.
Wh en
t
h e defective com
p
onent is locate
d
, it shoul
d
be
re place d usin g the re
p
lacement proced ure given u n
d
er
Corrective M aintena n ce .