Tektronix 7704A User Manual

T h is section of t
h e manual contains mainte n ance informatio
n for use in preventive maintenance, corrective maintenance,
or troubles
h
ooting
of t he 7704 Α .
Pa n el R e m ov al
P
o w er- Un it
R e m o v al
I
F---
WARNING]
potentials exist at several points t h roug h -
out t h is instr u me n t . Wh e n t he instru m ent is operated
wit h t he covers removed, do not touc h exposed
connectio n
s or
co m pone n ts . Some t r ansisto rs have
voltages prese n t on t h eir cases . Discon n ect powe r
before cleani ng t h e i n stru m entor replaci n g p arts .
The si d e an d bottom p anels of t
h
e 7704
Α are hel d in
p lace b y slotte d
fasteners
. To
re m ove t h e p anels, t u rn eac h
fastener
countercloc k wise
α
qu arter tur n wit h α large
screw d river, coin, or similar d
evice . T h en, lift
t
h e p anel
away from t
h e instru m e n
t .
T h e panels protect t h is i n st r ιι -
me n t
fro m
d ust
i n
t
he interior, an d also p rovi d e protection
to p
ersonnel fro m t h e op erating p otentials prese n t . In
a dd ition, t h ey re du ce t h e EMI ra d iatio
n fro m t he instr ιι -
ment and EMI interfere n ce to t h e display d
ue to ot h er
equ i pm ent .
WARNING
E xtre m e ca u tion m u st be used w h en tro u bles h ooti
n g
in t he power supply d ue to t he line v oltage, h ig h
voltage and h ig h current poten tials present . R efer to
t h e disc u ssio n entitled Access to Co m ponents in
P ower Unit for info r matio n on h ow to re m ove t he
protective cove r f r o m t h e power u nit .
The p
o
w er unit can
be
sli
d
o u t of t h e rear of t h e 7704 Α
to gain access to t h e L ogic circuit boar d an d for power- u nit
service .
To
re m ove t he p ower un it, first disco nn ect the
instru m ent fro m t h e p owe r so u rce . R emove t he fo u r screws
w h ic h hold t h e p ower u n it to t h e rear frame (see
F
ig
.
3-i )
.
Sli de t h e power unit out of t h e rear of the instru m ent un
til
it can be set on t h e w or k s u rface (gui d e t h e cables so
t hey
do not catc h on ot h er parts of t
he instr um ent) . T h e po w er
Α
M AI NT E N A N C
E
Section
3-7704 Α
Service
unit re m ains connecte d to t
h e rest of t he instr u ment so it
can be o p erated in t
h
is
position for troubles h ooting or
calibration . R everse t
h is proce du re w h en re p lacing t h e
power unit ; u se
care not to p i n ch t h e cables as t h e power
u nit is replaced .
B e s u re t h at all t h e sec u ri n g screws are
tig h t to h old t
h e p ower unit i n place prop erly .
PR EVE N TI V E M AI NT EN
A NC E
P reve n tive m ai n te n ance con sists of
cleaning, visual in-
s p ectio n , l u bricatio n , etc .
P
reventi
v e m aintenance per-
for m e d on α regular basis may
p revent i n stru m en t break-
down an d
will i mp rove t h e reliabilit y of t
h
is
instrume n t .
T h e
severity of t he environment to w
h ic h t h e 7704 Α is
s ub j
ected deter m ines t he fre q uency of
mainte n a n ce . Α
conve n ient time to perfor m p reventive
maintenance is
p rece d
ing recalib r ation of the instrume n t .
F ig .
3-1
. P o w er-u n it securi n g scre
w s .

Tektronix 7704A Specifications

General

Brand	Tektronix
Model	7704A
Category	Test Equipment
Language	English