Tektronix 2235 User Manual

M ai n tenan ce-2235 Service
2 . U nplug t he crt an o de lead connector from t he H ig h -

1 . R emove t
h
e screw
from t h
e
plastic p ower-s upp ly cov-
V oltage M ulti p lier lead located on left si de of P owe r -Supply

er on t
h
e b ottom section of
t he M ai n ci r c u it b oa r d . Press
sh iel d and disc h arge it to t he ch assis .

gently
on
t h e rear of t he cover and slide it forwar d .
3 . R emove two front panel screws t h at retain t he plastic

2 .
R
emove t
h
e screw
sec u ring t h eP owe r -Supply sh ield
crt frame and lig h t filter to t he front p an el . R emove t h e crt

to t he
M ain
circuit board (locate
d at t he b ottom of t he circuit
frame and lig h t filter from t he inst r ument .

board n ear t
h
e middle
rig h t
side of
t he frame) .
4 . W it h t he rear of t h e instr u ment faci ng you, place t h e

3 . R emove two screws sec u
ri n g
t
h
e
left r
ear of
t he Ροω
fi n gers of b ot h hands over t he front edge of t he fro n t

er-Supp ly s
h
ield to t
h
e bac
k
of
t h
e
ch assis frame .
s
u
bp
anel . T h en, using b ot h t h um b s, pressforward gen tly on
t he crt funnel near t h e fro n t of t he crt . Wh en t h e crt b ase
pins disengage from t he sock et, remove t he crt and t he crt

4 . R
emove
t h
e
crt ano de lea d from t he anode cli p on t h e
sh iel d t h roug h t h e inst ru me n t fro n t su bp anel . P lace t he crt i n side of
t h
e
P ower-S upp ly sh ield .
α safe place until it is ready to reinstall . If t he p lastic crt
corner p a ds fall out, save t h em for reinstallation .
5 . R emove t h e crt soc k et cover andcap from t he rear of
t he crt soc k et for reinstallation .
To reinstall t
h
e crt,
p erform t h e following ste p s :
5 .
R
emove
t h
e screw
from t he front upp er rig h t- h an d
cor n er of t
h
e
P
ower-Su pp
ly
s
h iel d .
6 . L ift t he sh ield up an d o u t of t
h
e c
h
assis
frame
b y
re-
moving t he rig h t rear corner
first .
6 . R einstall any
plastic crt corner p ads t h at are ou t of

To reinstall t heP ower-Sup p ly sh iel d , p
erform
t
h
e
follow-
place .
Insert t he c r t, crt sh iel d , anode lead, and Trace R ota-

ing ste ps :
tio n leads t hr oug h t h e fro n t- pan el opening . M ake su re all
p i ns are straig h t an d t h at t he indexing k eys on t he crt b ase,

7 . Insert t he sh iel d into t h ec h assis frame . M ake su re
soc
k et, and s h ield are aligne d . M ake sure t h at t he ground

t h at t he s h ield's rig h t and b ack e d ges are
i n
t
h
ei
r
c
h
assis
clip
ma
k es contact only wit h t he ou tsi de of t he crt s h ield .

frame guides, t h at t he crt soc k et-wire assem b
ly
is
i n
its cut-
out, a nd t h at t he Alt Sweep b oa r d is in its p lastic h ol de
r .
7 . Pu sh t h e crt base into t he soc k et . V erify t h at t he crt
base
and soc k et are flus h toget h er as viewed from t he rear

8 . R einstall t he screw at t h e upp er rig h t- h and corner of
and t
h
at
t h e crt is seated prop erly i n t he front-panel

t he sh ield (remove d i n step 5) .
opening .
8 . R einstall t he crt soc k et ca p and cover to t he rear of
t he crt soc k et (removed i n step 5) .
P owe r -S upp ly S h ield

F ilte r Ci r cu it B oard
6- 1 4
9 . R einstall t h e crt anode lead into t
h
e a
n
o de
cli p
on
t h
e
si de of t he P owe r -Su pp ly sh iel d (removed
in
step
4) .
10 . R ei n stall two sc r ews sec u ring t he s
h
ield to t
h
e bac
k
9 .
R ei n stall t h e crt frame and lig h t filter ; t hen sec u re

of t he c h assis fr ame (remove d in ste p 3) .
t h em wit h two fro n t panel screws (remove d i n step 3) .
11 . R ei n stall t h e screw h oldi n g t he sh ield to t he M ai n
10
.
R econnect t h e crt anode lea d to t h e H ig h - V oltage

circuit boa r d at t he rig h t side of t he frame (remove d i n step
M ulti p
lier (
d isco n nected in ste p 2) .

2) .
11 . R econnect t he four deflection-plate wires and t h e

12 . R einstall t h e plastic p ower-s upp
ly
cover on
t he b ot
T r ace R otation con nector (disconnecte d i n ste p 1) .

tom of t h e M ain circ u it board an d secu r e b ot h t he sh iel d and
t h e cove r wit h one screw (remove d i
n
ste p
1) .
To remove t h e P ower-S upp ly sh iel d , p erform t h e follow-

To remove t he F
ilter circuit
b oard, p
erform t he followi n g
ing
steps :

steps .

Tektronix 2235 Specifications

General

Brand	Tektronix
Model	2235
Category	Test Equipment
Language	English