Tektronix 7704A User Manual

4 . Solder t h e bul b to t he circ u it board . If p ossible, use
α
heat sin k to protect t he bulb du ring sol d ering .
5 . Install t he switc h using t h e proce dure d escri b e d
previou sly .
C . G R ATIC ULE BULB REPL ACEMEN T .
To replace t h e graticule b ulbs, first remove t he plastic
C R T mas k , lig h t filter, and metal lig h t s h ield . Pull on the
w h ite tabs to remove t h e graticule lam p assem b ly . Now,
sli de t h e lam p retaining stri p s to t he si d e, off t h e bulb b ase .
Pull t he bulb out of t he circuit boar d . Reverse t he order of
removal for replacement .
P
ower Tra n sformer R e p lacement . Replace t h e power
t r a n sformer only wit h α di r ect
re
p
lace m en t Te ktronix
tra n sformer .
To
replace
t
h
e
power
transformer, proceed as
follows :
1 . Remove Α 31, Rectifier
an d
F
ilter b oard , along wit h
t
he p ower transformer as give n under
Circ
u
it Boar d
Re p laceme n t .
2 . U nsolder t he p ower-transformer leads from t h e
Rectifier and F ilter boa r d . Remove t h e excess sol d er from
t he b oar d with α vac uum-ty p e d esol d ering tool .
3 . Remove t he b rass s p ring retai n ers
w
h
ic
h h
ol d t he
transformer win d ings and core in place
an
d remove
t
h ese
items .
4 . To replace t h e p ower tra n sformer, reverse t he ord er
of removal .
F
use
R ep laceme nt . T he fuses use d in t h is instr u ment are as
follows :
REV . Β , NO V . 1976
TA BLE 3-2
F use R ati n gs
R ecalibration AfterR ep air
Maintenance-7704A Service
After any electrical component h
as
b een replaced,
t
he
calibration of t hat particular circuit s h oul d b e c h ecked, as
well as t he cali b ration of ot h er closely related circuits .
Since
t h
e
low-voltage su p plies affect all circuits, cali b ration
of t
h e
e
n
tire
i n
str
u ment
s
h
o
u
ld b
e ch
eck
e
d if wor k h as
b een done in t he low-voltage su pp lies or if t he power
transformer h as bee n re placed . See Section 4 for α complete
calibration proce d ure .
Instrument R e p ac k aging
If t he Tek tronix instrument is to b
e
s
h
ipped to α Te ktronix
Service Center for service or re p air, attac h α
tag
s h owing :
owner (wit h add ress) and t he name of an indivi du al at yo u r
firm t h at can be contacte d , complete instr u ment serial
num
b
er
and α d
escription of
t
h e service re qu ire
d .
Save a n d re- u se t he p ackage in w h ic h yo u r instrument was
s h ip p
e
d
.
If t h
e
original
pac
kaging is
unfit for u se or not
available, repac k
age t
h e
inst
ru ment
as
follows :
1 . O b tain α carton of corr u gated cardboa r d h aving insi de
d imensions of no less t han six inc h es more t h an t he
instrument d imensions ; t h is will allow for cu s h ioning .
Refer to t he following ta b le for carton test strengt h
re q uirements .
2 . S u rro u nd t h e instr u me n t with p olyeth ylene s h eeting to
protect t h e finis h of t he instr u ment .
3 . C
u
s h ion t h
e
i n str u ment on all si des by tig h tly pac k ing
d unnage or u ret h a ne foam between carton and instr u -
me n t, allowing th ree inc h es on all si d es .
4 . Seal carton with sh ipping tape or in d ustrial sta p ler .
S H I PP I NGCA R TON TE STST RENGT H
3- 1 9
Circuit
Nu m b er R ating F
unctio n
L
ocation
F 3001 4 Α F ast L ine
I nput
L ine Selector Assem b ly
F 3003 2 Α F ast Inverter L ine Selector Assem b ly
Gross Weig h
t (lb)
0-10
Carton Test Strengt h (l
b )
200
10-30 275
30-120 375
120-140 500
140-160 600

Tektronix 7704A Specifications

General

Brand	Tektronix
Model	7704A
Category	Test Equipment
Language	English