Tektronix 7704A User Manual

Maintenance-7704A Service
7 . H
ol
d one h
an
d
on t
h e CRT
faceplate and pus h
forward
on
the C RT base with
t
h e
ot
h
er . As t
h
e C
R T
starts
ou t of t h e s h ield, gras p it firmly . Gui
de t
h
e ano d e lea d
t hr ough t h e cutout in the CR T
s
h iel
d as t
h
e C
R T
is
remove d .
Β . REPL AC EME NT :
1 . I n sert t he C RT into t h e s h iel d . Guid e t he anode lea d
t h roug h t h e h ole in t h e C RT s h iel d . Set t he C RT firmly
against t he cush ions mounte d on eac h corner of t h e
frame
pa
n el .
2 . Clean t he C RT faceplate, plastic face p
late protector,
an d t he lig h t filter with d enatured alco h ol .
3 .
P
lace t
h
e b lac k p lastic C
RT
mas k over t he C RT
face p
late .
4 .
Reconnect
t
h e
multi-pin
con n
ector to t h
e
CR
T
b ezel
(align arrow on connector wit
h
arrow on bezel) . H ol d t he
clear faceplate protector in
position an d install t he C R
T
bezel . F irmly tig h ten the four screws
.
5 .
Pu
s
h forwar
d on t
h
e C
R T
b
ase
to be
certain
t h at t h
e
CR T
is as far forwar d as p ossi b le .
T h
en tig h ten t he two
screws beside
t
h e CR T b ase sock
et
until
t
h
e s p rings on t he
screws are fully compressed .
3-
1 8
6 . Replace t he C R T base sock et .
7 . F aste n t h e CR T ano d e lea d into th e p lastic fasteners .
Reconnect t he CR T ano d e p lug .
8 . Carefully reconnect t he d eflectio n -plate connectors .
After eac h connector is i n stalle d , lig h tly pull on its lea d
to
be sure t h at it will remain in p lace .
9 . R eplace t h e metal lig h t s h iel d and t h e tinte d filter .
T hen sna p t he plastic C RT mas k i n to t he CR T b ezel .
10 . C h ec k t he cali b
ration of t
h
e complete instrument .
Cali b ration proced ure is given in Section 4 .
Switc h R eplaceme n t . Several types
of switc
h
es
are use
d
i n t h is instrument . T h e pull and sli de switc h es s h oul
d be
replace d as α u n it if d amaged . Observe t h e soldering
REV . JUL Y
1974
precautions given p reviously
i n t h is section w hen re p lacing
t h ese switc h es . T h e following special maintenance
infor-
mation is provi d ed for p us hbu tton switc h es .
T he p u s hbu tton switc h es
are not
repaira
b
le
and s
h
ould
be re p laced as α u nit if defective . See t he information under
L ig h t- B ul b R ep lacement for instr u ctions
on
replacing t he
lig h t bu l b s . To replace α pus hb utton switc h , follow t he
p rocedure given for re placement of t he Calibrator circuit
b oard .
L ig h t- B ul b R e p lacement . T he following proced u res d e-
scribe re p lacement of the lig h t b ul b s in t h is instrument .
Α . M OD E S W ITC HE S .
U se t h e following p roce d ure to replace lig h t bu l b s in t h e
VER TICA L M OD E or H O R IZO N TA L M OD E switc h es :
1 . Remove t
h
e applicable mo d e switc h as give n p reviously .
2 . Un sol d er t h
e
leads of t h
e
bul b a
n
d plastic h older
from t
h
e circuit boar d ; remove t
h ese items from
t
h e
switc
h
assem b ly
as α
unit .
3 . R emove t h e d efective bul b from t h e p lastic h older .
4 . Install t h e new bu l b i n t he plastic h ol d er ; install t h is
unit in t h e switc h assem b ly .
5 . Sol d er t h e b ul b
an
d h
ol
d er
to t
he circ u
it boar d .
6 . Replace t h e mo d e switc h as described previo u sly .
Β . T R IGG ERSO
UR C
E
S W ITC HE S .
To
replace
lig
h
t b ulbs in t he Α T R IGG ER SO UR C E
or
Β
TR IGG ERSO UR C E switc h
es, p rocee d as follows :
1 .
R emove
t h
e
app lica b le trigger so u rce switc h , usi ng
t h e p roce d ure
described previously .
2 . U nsol d er t he d efective
bul b from t he circuit b oar d .
3 . Install t h e new bul b
so it is p ositione d in t he same
manner as t he original b u l b .

Tektronix 7704A Specifications

General

Brand	Tektronix
Model	7704A
Category	Test Equipment
Language	English