Tektronix 2213 - Page 99

M aintena n ce-2213
Service
4 . W it h t
h
e rear of
t h e i n st r ume n t facing you, place t h e
fingers of
b ot h h a n ds over t h e front edge of t h e
front
sub p a
n el . T h e n , u sing bot h t h um b s, press forward ge n tly on
t h e crt
funnel near t h e fro n t of t h e crt . Wh e n t h e ε rt b ase
pins disengage from t h e soc k et, remove t h e ε rt and
crt
s
h iel d t h roug h t h e i n st ru ment fro n t su b p anel . P lace t
h
e
crt in
α safe p lace until it is rea d y to rei n stall
. If t h
e
plastic crt
cor n er p ads fall out, save t h em fo
r r einstallatio n .
To reinstall t h e crt, perfo r m t h e
following ste
p
s :
5 . R ei n stall any plastic crt co
r ner p
a
d s t h at may be o u t
of place . Insert t h e crt, crt s
h
ield,
ano d e lead, a nd T r ace
R otation leads t h roug h t h e
front-panel ope n ing . M a k e sure
all pins are straig h t and t h at t h e
indexi n g k eys on t h e crt
b ase a n d soc k et are alig n e d .
M
a
k
e
s ur e t h e ε rt s h ield
grou n d clip only ma k es contact
wit h t h e outsi d e of t h e crt
s h ield .
6 . P us h t h e ε
rt
b ase
into t h e soc k et . C h ec k t h at t h ey are
flus h toget
h
er as
viewed from t h e rear an d t h at t h e crt is
seate d p roperly
i n its front- p anel o p e n ing .
6α .
If applicable, rei n stall t h e s h ield at t h e b ac k of t h e
ε rt ; t
h
en
secu r e it wit h two nuts (remove d i n ste p 3α ) .
7 . R einstall t h e crt f r ame a n d lig
h t filte r ; t h en secu r e
t h em wit h two screws (removed
i n ste p 3) .
8 . R eco nn ect t h e crt a n ode lead
to t h e H ig h - V oltage
M ulti p lie r (disconnecte d in ste p 2) .
9 . R eco n nect t h e fou r deflectio
n - p late wi r es an d t h e
Trace R otatio n con n ectio
n
(disco
n necte d in ste p 1) .
H ig h - V oltage S h iel d
To
r emove t h e H ig h - V oltage s
h ield, perform t h e following
ste ps :
1 . R emove t h e screw from t
h
e p
lastic h ig h -voltage cover
on t h e b ottom sectio n of t h e
M
ai
n circuit boar d . P ress gent-
ly on t h e rear of t h e cover and slide
it forwar d .
2 .
R emove t h e screw securi n g t
h
e
H ig h - V oltage s h iel d
to t
h
e
M ain circuit b oard (located at t
h
e
bottom of t h e ci r cuit
b oard near
t h e rig h t side of t h e frame) .
3 . R emove two screws
securing t h e left r ear of t h e H ig
h -
V oltage s h ield to t
h
e bac
k of t h e c h assis frame .
4 . R emove
t h e sc r ew from t h e front u p
per rig h t- h an d
co rn er of t
h
e
H ig h - V oltage s h ield .
6- 1 4
5 . R emove
t h
e
screw at t h e front up per left- h and cor n er
a n d rotate t
h
e su p port b rac
k
et away
from t h
e
H ig h - V
oltage
s
h
ield .
5α . F or inst ru me n ts eq u i p ped wit h t h e Pr eregulator
boa rd ( Α 18), r emove t h e sc r ew from t h e fro n t of t h e H ig h -
V oltage S h iel d at t h e up pe r -left h a nd corner .
6 . L ift t h e s h ield up a n d out of t h ec h assis frame b y r e-
moving t h e r ig h t rear cor n er first .
To rei n stall t h e H ig h - V oltage s h ield, perform t h e following
ste p s :
7 . I n sert t h e s h ield i n to t h e c h assis frame . M a k e su
r
e
t h
at
t h
e s
h
ield's
rig h t a nd b ac k to p edges a r e i n t h ei r c h as-
sis frame guides, t
h
at t h e crt soc
k
et-wi
r
e assem b
ly
is
i n
its
cutout, a n d t h at t
h
e
Alt
Sweep b oard is
in its
p lastic
h
older
.
7
α .
If
a p
plicable, r einstall t h e screw to t h e front of t h e
H ig h - V oltage S h iel d ( r emove d in step 5α ) .
8 . R otate t h e s upp ort br ac k et b ac k i n to place a n d se-
cure it wit h t h e screw remove d i n ste p 5 .
9 . R einstall t h e screw at t h e u p per rig h t- h a n d cor n er of
t h e s h ield (removed in step 4) .
10 . R einstall two screws sec u ri n g t h e s h iel d to t h e bac k
of t h e c h assis f r ame ( r emoved i n ste p 3) .
11 . R einstall t
h
e sc
r
ew
h
oldi
n g
t
h
e s
h
ield to t
h
e
M ain
circuit b oard at
t h
e
r ig h t si d
e of
t h e frame ( r emove d in ste p
2) .
12 . R einstall t
h
e plastic
h ig h
-voltage cove
r
on
t h
e bot-
tom of t
h
e
M
ai
n circ u it boar d and sec u re t h e s h ield and
cove
r wit h
one
screw (remove d in step 1) .
Atte
nu ato r /Swee p Circuit B oa rd
To remove
t h e Attenuator/Swee p ci r c u it boar d , p erfo
r m
t h e followi n g ste p s :
1 . Use α
1/16-i n c h Allen wre n c h to loosen t h e set screws
in t h e following kn obs an
d remove t h e kn obs : C H 1 a n d
C H 2 V O L TS/DI V
V
aria
b le, S E C/DI V Va r ia b le, and
S E C/DI V . Note
t h e p osition of t h e S E C/DI V kn o b for
rei n stallation
reference .
REV N
O
V 1982