Tektronix 2213 - Page 90

I N T R OD U CTIO
N
P reventive
maintenance perfo r med
on
α
regular b asis
s ho u l d reveal
most p otential problems
befo re
an
instrume n t
malfu
n ctions . H owever, s h oul d trou
b les h ooting b e re qu i r ed,
t h e
following i n formation is p
r ovi ded to facilitate location
of α
fault . In a d dition, t h
e material p rese n ted in the
"T
h eory of Ope r atio n" an d t
he "Diagrams" sectio n s of t h is
man
u al may be h el p f u l w h ile
trou b les h ooting .
T R O UBLE S
H
OOTI
N G AIDS
Sc
h ematic Diagrams
Com p lete sc h ematic d iagrams are locate d on ta
bbed
fol dout pages in the "Diag r ams" sectio
n .
T
he portions of
circuitry
t h at a r e mounte d on eac
h
circuit boa
r d are
e
n close d with i n h eavy b lac k lines . Also wit
h in t he b lac k
lines, near eit h e r t he to p o r t he b ottom
e d ge, are t h e
assembly nu mber and name of t h
e
circuit boa
r d .
Com p one n t numbers an d electrical
val u
es
of com p o-
ne n ts in th is inst r ument are s h own on t
h
e sc
h ematic
d iagrams . R efer to t he fi r st page of
t he "Diagrams" section
fo r definitions of t he
reference designators and sym b ols
use d to i d entify components .
Important voltages and wave-
fo r m refere
n
ce
numbers (enclose d in h exago n al-s haped
b oxes)
are also s h ow n on each diagram . W aveform illus-
trations are locate d a d j ace n t to t h eir respective sc
h ematic
diagram, and t h e p h ysical locatio n of
eac
h
waveform test
p oint is s h own on t h e a ppr o p r iate
circ u it boa r d illustration .
Circuit B oar d Illustrations
Circuit b oar d illustrations (s h owing t h e p
h
ysical location
of
eac h com p onent) are provide d fo r u se in con j unctio
n
wit h eac h sc h ematic d iagram . E ac h boar d illust r
ation can
be
fo und on t he back si de of α fol dout p age,
p rece d i n g t h e
sc
h ematic diagram(s) to w h ic h it relates . If more t h a
n on
e
sc h ematic
d iagram is associate d with α particular circuit
b oard,
t h e b oard ill u stration is located on α left-
h
an
d
page p recedi n g the d iagram
wit h w h ic h t h e b oa r d is first
associate d .
Also p rovi ded in the "Diagrams"
section
is an
ill u
s-
tration
of t h e b ottom si d e of the M ain ci r c u it b oar d . T
h
is
d rawing facilitates tro
ub les h ooting by s h owing t h e con-
nection p ad s an d t
h
e location
of com p onents t h at a r e
mou
n
te
d
on
t h e to p si de of t he boa rd . Pr o b ing of M
ain
boar
d com p one nt signals t h at a r e inaccessible
fr
om t
h e
T R O
UBLE
S
H OOTI N G
to p si d e can b e ac h ieve d wit hout t h
e n
ecessity of dis-
assembling p ortions of t he i
n
st
r
ument .
W
aveform test-point locations are also identifie d on t
h
e
ci r c u it boar d illustratio n b y hexagonal-o u tline d nu m b
ers
t
h
at
corres
p
ond to t he wavefo r m numbers appearing on
b ot h t h e sc h ematic d iagram a nd t he waveform ill u stratio
n .
Circ u it B oar
d
L
ocations
An ill
u stratio n d e p icti ng t he location of α ci r cuit b oa r d
with in t
he i n st ru ment is s h own on t h e fol dout page
ad j
acent to t he ci r cuit board illustratio n .
Circ
u
it B
oar d Interco n nection Diagram
Α circ
u it b oar d i n terconnectio n d iag r am is also provi ded
in t he "Diagrams" sectio n to ai d in traci
n g
α
sig n
al
p
at
h
or
power so u rce b
etween b oards . T h e enti r e oscillosco p e is
ill u st r ated,
with p l u g
a
n d j ac k n u mbers s h own along wit h
associated p
in n umbers . T h e off-boa r d com p onents are also
s h ow n , a
nd
t he sc h ematic d iagram numbers on w
h
ic
h
t h ese components can be fo u nd are i d
entifie
d .
P ower Distribution
Diagram
Α
P ower Distribution d iagram is pr ovi ded to ai d in
tro
ub les h ooti n g powe r -s upp ly p r o b lems . T h is diagram
s h
ows
se r vice ju mpers used to remove p ower f r om t
h
e
various ci r c u it b oards . E xcessive loa d ing on α p ower s upp ly
b y α circuit b oard ca n be isolate d to t
h
e faulty b oa
rd
by
d isco n necting appro pr iate service j umpers .
Gri d Coor d inate System
M aintena n ce-2213 Service
E ac h sc h ematic diagram an d circuit board illustration
h as α gri d bord er alo ng its left and to p ed ges . Α ta b le
located ad j acent to eac h sc h ematic d iagram lists t he gri d
coor
d i
n
ates
of eac h com p onent s h ow n on t h at sc h ematic .
To ai d in p
h ysically locating α com ponent on t h e r es p ective
circ u it boar d ,
t h is ta b le also lists t h e circuit- b oard gri d
coor d inate of eac h com ponent .
A dj acent to eac h circuit b oard illustration is an alp
h
a-
nume r ic listing of every com p onent mounte d on t
h
at
b oa r d . Α secon d column i n t
h
is listing
identifies t h e
sc h ematic d iagram in w
h
ic
h
eac
h com ponent
can
b e found .
T h ese component-locato
r
tables
are especially useful w hen
more t h a n one sc h ematic d iagram is associate d wit
h
α
p articula r ci r cuit boar d .
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