Tektronix 2235 User Manual

Mai n tenance--2235 Service
Note t h at some tro ub les
h ooting- p roce d ure boxes
on

b rown-gray-green stripe co
m
b
ination, in d icates Tek tro n ix
eac
h
c
h
a
r t contain nu m b ers along their lower ed ges . T h ese

Part N u m b
e
r 152-0185-00) . T he cat hode an d ano de en d s of
numbers identify t
h
e app
lica b le sch ematic d iagram(s) to b e

α metal-e ncase d d iode can be ide
n tified
by
t h
e diode sy
m bol
used
w h
en
performi n g t h e actio n s p ecified in t h e b ox .

mar ked
on
its b o dy .
Both General and Speci f ic notes may be calle d out
i n
t
h
e
t r oubles h ooting-c h art b oxes .
T h
ese notes are
locate d
on

Se m ico ndu ctor L ea d Configuratio
n
s
t h e inne r pa n els of t
h
e foldout
p ages . Specific Notes contain

Figure 9-2
in t h
e
"Diagrams" section sh ows t he lea d con -
proced u res or a dd itional informatio n to be used
i n perfo r m-

figurations for semico nducto
r devices u se d in t he instr u -
ing t he partic u lar tro ub les
h ooting
step
calle d for i n t h at box .

ment . T h ese lea d config u ratio ns an d case styles a
r
e
ty p
ical
Ge n eral Notes contai
n
i
n
formation t h at pertains to t
h
e o
v er-

of t h ose availa b le at completion of
t h
e
d esig n of t h e inst r u-
αΙΙ tro ub les h ooting p rocedu r e .

ment . V en do
r
c
h
a
n
ges an
d perfor m ance improvement
changes may res u lt in ch an ges of case styles o
r lea d config
Some malfu n ctions, esp
ecially t h ose involving multiple si-

urations .
If
t
h
e d evice
in q uestio n d oes n ot a ppea r to matc h
m u ltaneous failu r es, may re q ui
r
e
mo r e ela b orate tro ub le-

the co
n figu r ation in Fig u re 9-2, examine t he associate d ci r-
s h ooting approac hes wit h references to circuit desc
r i p
tions

cuitry o r con sult α se
m ico n d u ctor manufact u rer's data
in t h e "T heory o r Operation" section of this
man
u al
.

s h
eet .
Component Color Coding
I n formatio n r egarding color codes and
mar k ings
of resis-
tors an d cap acito r s is located
in t he color-co d ing ill u stratio n
( F igure 9-1) at t he begi n ning o f t he "Diag
r
a
m
s" section
.
RE SISTO R CO L O
R COD E . R esistors used in t h is instru-
ment are car b on-fil m , com p osition, o
r pr
ecision
metal-film
types . T hey are color co de
d wit h t h e ΕΙΑ colo r code ; howev-
er, some metal-film resistors may h ave t
h
e
val
ue p
rinte d on
t h e bo d y . T h e colo r code is
i n
te
rp
rete d
b y starting wit h the
strip t h at is nearest to o ne e nd of t
h
e resisto
r .
Com
p osition
resistors h ave fo u r stripes ; t
h
ese
represe n t two sig n ifica n t
fig u res, α multi p lie
r ,
a
n
d α
tolerance val u e . Metal-fil m resis-
tors h ave five stri p es w h ic h r e pr ese
n t t hr
ee
significant fig-
u r es, α m u ltiplier, and α tolerance value .
CA P ACITO R M A RK INGS . Ca p acita
n
ce values of
com-
mon disc capacitors and sma
l l electrolytics a r e ma rk ed on
t he side of
t h
e
capacitor b o dy . Wh ite ceramicca p acitors are
color code i n p icofa
r
ads,
using
α
modifie d ΕΙΑ cod e-
Di p p e d ta ntalu
m
ca p
acitors are color co d e d in
microfarads . T he color d ot i nd icates bot
h
t
h
e positive
lea d
and t he voltage rating
.
Since
t h ese ca p acito r s a r e easily
d est r oyed by
r
eve
r
se d or excessive voltage, b e careful
to
o b serve t he p ola r ity and voltage
r ati ng .
Mu lti p i n Connectors
M ulti p i n con n ecto r o r ientatio n is i n dicate d by two trian-
gles : one on t h e hol d er and o ne on t h e ci r cuit boa
r
d . Slot
num b ers are u su ally molded into the h ol d er . Wh e n α con-
nection is ma de to circ u it- b oar d p
i
ns, ens u re
t h
at
t h
e
tria n -
gle on t he h ol d e
r
a
n
d
t
h e t
r
ia
n
gle on t he circuit b oard are
aligne d wit h eac h ot h er (see Figu r e 6-1)
.
ti a -' '
h-
1ι 7 0, L
6
ρ
(0995-11) 2662-50
Figure β -1 . Multi- connector h ol d e r o r ie n tation .
DIOD E CO L OR
COD E . The cat h o d e en d of each glass-
encased d io de is
i n
dicated by
eit h er α stripe, α series of
st r ipes, or α d ot . For most silico
n
o
r
ge
r
ma
n
iu
m d io des
ma rk ed wit h α series of stri
p
es,
the color combi n atio n of t he

T R O UBLE SH OOTI N G E Q U I PMEN
T
st r i pes ide
n tifies t h ree d igits of t h e Tek tronix Part Nu m be r ,
u sing t he r esisto r colo
r
-code system (e .g .,
α d io de h aving

T he eq ui p ment liste d in Table
4-1,
o
r
e q uivale
n t
eq
u i p -
eit h er α pin k or α b lue
stri p at t h e cat h o de e n d, t h e n α

meat, may b e u seful w hen troubles h ooting t h is i n st
r
u
m
e
n
t .

Tektronix 2235 Specifications

General

Brand	Tektronix
Model	2235
Category	Test Equipment
Language	English