Tektronix 2213 - Page 100

2 .
Set t
h
e
C H
1 and C H
2
V O L TS/DI V switc h es to t he
same p ositio n ; t h
e
n
remove t h ei r k no b s b yp u lli ng straig h t
o u t from t he fro n t
pa
n el . N ote switc h
positions for
reinstallatio n refere n
ce .
3 . U se α 9/16-inc h
nut
driver
to remove t
h
e nu ts secur-
i ng t he V O L TS/DI V switc h es to t h e front panel .
4 . Disco n nect t h e following connectors fr om t h e
Attenuato r /Swee p circ u it b oar d :
α . P1 011, α four-wire co nn ector located b e h in d t he C H 1
V O L TS/DI V
switc h assembly .
b .
P201 1,
α four-wire
connecto r located b e h in d t he C H2
V O L TS/DI V switc h
assem b ly .
c . Ρ 7000, α seve n -wi r
e co
nn
ecto
r
located on the rear
edge of t h e ci r cuit board .
d . Ρ 6000, α ten-wire co n nector locate d
on t
h
e
r ig h
t ed ge
of t he circuit board .
5 . R emove t hr ee screws w h ic h secure t h e sh ield to t h e
M ain circuit b oard (locate d on t
h
e bottom of
t h
e
M
ai
n circuit
boar d ) .
6 . L oosen bu t d o n ot r emove two screws securing t he
fro n t of t he sh ield to α b rac k et on t he fr on t pan el . T h ese
screws are accessible from t he bottom of t h e i n st r ume n t
t hr oug h two h oles along t he fro n t of t he M ai n circ u it b oa rd .
7 . Pull t h e Attenuator/Swee p circ u it boar d and s h iel d
assem b ly straig h t bac k from t he front of t he inst r ume n t un til
t h e circuit board i n te r con n ecting p ins are d ise n gaged and
t h e switc h s h afts are clea r of t he h oles in t h e Front- P anel
ci r c u it b oa rd . Th en lift ou t t h een tire assembly t h ro u g h t he
top of t he i n st r ume n t .
8 . If accessi b ility to t he b ottom of t he Atte nu ator/ Sweep
circuit board is d esired, remove t h ree screws located at
t h ree cor ners of t he circ u it board and two sc r ews fr om t he
b ottom of t he sh ield and se p arate t h e s h iel d from t h e circuit
boa r d .
To
reinstall t h e Attenuator/Swee p circ u it boar d , perfo r m
t h e following ste p s :
9 . If t h e sh iel d has been removed, secure it to t
h
e
Attenuato
r
/Swee p circuit b oard
using t h
ree screws
(removed
i n
ste p 8) .
I n
se
r
t two sc
r
ews
in t h
e b
ottom
of
t he
sh ield at t he fr ont edge ( r emoved in ste p 8), but do not
tig h ten t h em .
REV NOV 1982
M ai n tenance-2213 Service
10
. Insert
t h
e t
h
ree switc h sh afts t h roug h t h e h oles i n
t he Fr o n t- Pa n el circuit
boar d and t
h
e fro n t p an el . Ca r efully
alig n t he 10 i n terconnecti n g p i n
s on t
h
e F ront- P an el circuit
board wit h t h eir corresponding
co
n
nectors on t he
Attenuator/Sweep circuit board . Push t h
e boa
r
d forwa rd
into position, ensu r ing t h at t h e two sc r ews i n t h
e bottom
sh ield engage t he fro n t- pan el b rac k
et
.
11 . Tig hten two screws securing t he sh ield to t h e front-
p anel b rac k et (loose ne d i n ste p 6) .
12 . R ei n stall t h ree screws sec ur i ng t h e sh iel d to t he
M ain ci r cu it b oard (r emoved i n step 5) . T hen tig h te n t he two
. screws installed at t he f r o n t ed ge of t he s h iel d in ste p 9 .
13 . R eco
nn
ect t he fou r conn ectors to t h e Atte n uato r /
Sweep ci
r
cuit b oa rd t h at were disconnecte d i n ste p 4 .
14 . R einstall two
9/16-i
n
c
h
nuts sec ur i ng t he V O L TS/
DI V
switc
h
s
h
afts to t
h
e
front
panel ( r emoved i n step 3) .
15 . R einstall t h e two V O L TS/DI V k
no b s at t he positions
noted i n ste p2 .
16 . R ei n stall t he S E C/DI V k nob on to its sh aft at t he
setti ng n oted i n ste p 1 and tig h te n its set sc r ews
.
17 . R otate t he t h ree V a r iable cont r ol sh afts fully
cloc k wise to t h eir calibrate d deten t positions .
18 . R einstall t h eVa r ia b le kn o bs onto t h ei r s h afts (wit h
t he lette r ing h
o
r izo n tal
a
n
d
rig h
t-si de up) and tig h te n t h ei r
set sc r ews .
F
ro
n
t-
P an el
Ci
r c
u it B oard
To remove t h e F ro n t- Pa n el circ u it b oard, perform t h e fol-
lowing
steps :
1 . R
emove
t h
e ει t (see t h e "Cat hode- R ay Tube" r emoval
procedure) .
2 . R emove t he Attenuato r /Swee p circ u it b oa rd (see t h e
"Atten u ator/Swee p Ci r cuit Boa r d" removal procedure) .
3 . R emove t he k nobs from t he followi ng con trol sh afts
b yp u lling t h em st r aig h t out fr om t he front panel : C ha nn el 1
and C han nel 2 P OSITIO N , H orizo n tal P OSITIO N , AU TO
F OC U S, AU TO I N T EN SITY, TR IGG ER VA R H O L DO FF,
and TR IGG ERLEVEL .
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