Tektronix 2213 - Page 98

7 . Clean t h e a r ea a r o u nd t h e solde r co nn ectio
n
wit
h
an
ap pr ove d flux-removing solve n t . B e ca r eful
n
ot to remove
any of t h e printe d informatio n f r om t h e ci r c u it boar d .
REM OVA L AND REPL AC EMEN T
I N STRU CTIO N S
T h
e ex
p
lo
de d view d rawi n gs in t h e " Replacea b le
M ec h a n ical P arts" list may be h elpf u l du ring t h e r emoval
a n d rei n stallatio n of i n divi du al su b assem b lies o r
com p onents . Circ u it boar d a n d compone n t locations are
s h ow n i n t h e "Diag r ams" section .
Ca b i n et
WARNING
To avoid electric s h oc k , disco
nn
ect
t h
e instrument
f r om t
h
e ac-power-input so ur ce
befo r e r emo v ing or
r
e p
laci ngany compo nen t o r assembly .
To
remove t h e inst ru ment ca b inet, p erfo r m t h e following
ste p s :
1 . Disco nn ect t h e i n str u ment f r om its αι -powe r -inp u t
sou r ce .
2 .
On
i n st ru ments wit h d etac h able powe r cords,
disconnect t h e power cord from t h e i n str u me n t .
3 . R emove t h e screw f r om t h e rig h t rear side of t h e
ca b inet and two screws from t h e rear p a n el . T
h
en
r
emove
t h e r ear p anel and, if ap plicable, fee d
t h
e no
n
detac
h
a
b le
p ower cord t h roug h t h e rea r p anel as t
h
e p a
n
el is
r
emoved .
4 . Pull t h e front p anel a nd attac h ed c h assis forwa rd a nd
o u t of t h e cabi n et .
To reinstall t h e ca b inet, perform t h e following steps :
5 . Slide t h e c h assis frame into t h e cabi n et from t h e f r ont
until
t
h
e
cabinet is f u lly i n to t h e f r o n t-panel groove a n d t h e
r ear of
t h
e cabi
n
et
is
flus
h wit h t h e rear of t h e c h assis .
6 .
F
eed
t h
e
attac h e d p owerco r d (if a pp lica b le) t h roug h
t h e
h
ole
i n t h e rea r p anel . Alig n t h e rear- p anel a nd si d e
mounting
h
oles
wit h t h e screw h oles in t h e c h assis frame
and rei
n stall t h e t h ree sc r ews remove d i n step 3 .
REV N O V 1982
Cat h o de-R ay T ub e
M ai n te n a n ce-2213
Service
To ensu
re t h at t he ca b inet is g r ou nded to t he
inst
r ument c h assis, t he screw at t he r ig h t r ear side of
t h
e ca
b i n et s h o u l d be tig h tly sec u red .
7 . R eco n nect t h e powe r cor d (if d isco n necte d
in
ste p
2) .
W A RN I NG
U se car e w he
nh
a
n dli n g
α
crt Brea k age of t he crt
may cause
h ig h -velocity
scattering
ofglass f r agments
(im p losion) .
P rotective
clot
h ing an d safety glasses
sh ould be
wor n . Avoid stri k ing t he crt
on
any ob j ect
w h ic h may cause
it
to crac
k or implo d e . Wh e n stori n g
α crt,
eit h er p lace it i nα pr otective carto n or set it face
d ow
n
on α
smoot h surface i n α pr otecte d locatio n wit h
α soft
mat u n d er th e face p late .
To
remove t h e crt, perform t h e followi n g ste p s :
1 . Discon n ect fo ur deflection- p late wires at t h e middle of
t h e crt nec k an d unpl u g t h e T r ace R otation co
nn
ecto
r
( Ρ 8006) from t h e F ront- P anel ci r c u it boa rd ( n ote t h e
co nn ection locatio n s an d wire color for r ei n stallatio
n
reference) .
W A RN I NG
Th e crt anode an d output te
r mi n
al of
t he H ig h -Voltage
Mu ltiplie r will r etai
n
α
h ig h -voltage ch arge after t he
i n str u me
n t is t ur ned off .
To
avoi d elect r ical s h oc k ,
gro
un d bot
h th e out p ut te r mi n al of t he mu lti p lie r an d
t h e crt high-voltage a
n
ode lead to
t h
e
mai n i n str u me n t
ch assis after disco
nn
ecti
ng t he h ig h -voltage lead .
2 . U nplug
t h
e
crt anode lead co nn ecto r f r om t h e H ig h -
V oltage
M ulti p lier at t h e fro n t left corner of t h e H ig h - V oltage
s h iel d and disc h a
r
ge it to t
h
e c
h
assis .
3 . R emove two sc r ews t h at retai
n
t
h
e p lastic
crt frame
and lig h t filter to t h e fro n t p anel
. R
emove
t h
e
crt f r ame and
lig h t filter from t h e i n str u ment .
3α . F o r Instr u me n ts wit h t h e P reregulato
r
boar
d ( Α 18),
removetwo nuts sec ur
ing
t
h
e s
h
ield at
t h e b ac k of t h e crt
a n d r emove t h e s
h
ield .
6- 1
3