Tektronix 2213 - Page 205

Α . U se sc h ematic d iagrams, t he ove ra ll b l
oc k d iag r am,
c i
r
c u it
b oard i ll ust r atio n s, a nd ci rcuit d esc r i p tio ns
w h en a na l yzi ng i nst ru me n t ma l
f
un
ctio n s a nd l ocati n g
test p oi n ts . The sc h ematic d iag r ams i
n
c l u de
typ ica l
wavefo rm s a nd vo l
tages t h at are i n te nd ed as an ai d
1 η t ro ub l esh ooti ng .
Β .
C .
2 .
3 .
G
ENER A L N OT E S
Al ways set
t h
e
P O WER switc h to O FF a nd unp l ug t h e l i n e
cord b efo re swa pp i n g, r emovi
n g, or r ep l aci ng co mp onen ts,
a nd b efore co nn ecti ng or d isco nn ecti ng i n st
rum
e
n t l ea ds
and ca b l es .
Wh e n a na l yzi n g ci rc u it ma l f un ctio
n
s, co
n
si
der co nn ecto rs
a nd cab l es
as p ossi b l e ca u ses of fai l u re .
S PE C I F I C N OTES
Set i n itia l
fron t- pan e l
VER T I CA L M OD E
V O L TS/D I V
V O L TS/DI
V V ar ia b l e
AC-G N D-DC
V e r tica l P OS I T I O N
T R I GGER M OD E
ΙΝΤ
SOUR CE
S E C/D I V
S E C/D I V Var ia b l e
Χ 1 θ M ag
n ificatio n
A U TO I N T EN S I TY
A U TO F OC US
H o
r
izo
n ta l P OS I T I O N
P O WER Switc h
HOR IZO N TA L M OD E
co n t ro l s as fo ll ows :
C H
1
0 .1 V
Ca l d ete n t
AC
Mid ran ge
A UTO
VER
T M OD E
ΙΝΤ
0 .1 ms
Ca l
d
ete n
t
Off (Ca l bu tto n
M i dr a n ge
Mi dr an ge
Mi dr an ge
Off (bu tto n
ΝΟ D L
Y
out )
V e r ify t he l ow-vo l tage p owe r s
upp
l
ies at t he
fo ll owi n g test p oi n ts :
ΝΟΤΕ
Α HV pr ob e is r e qu i red to meas ur
e t h e -2 kV
s upp l y .
T urn off t he p owe r a nd m a k e t h e
test e qu i p me
n t conn ectio ns to t he osci ll osco pe .
Set t h e vo l tmete r to r ea d at l east -3
kV, t hen
t urn t he osci ll osco p e p owe r b ac k on to ta k e
t he r ea d i n g . Afte r ob tai n i ng
t he r ea d i n g,
t urn off t he osci ll osco pe p owe r to d isco
nn
ect
t h
e test
e qu i pm e n t conn ectio n s, a nd r e p l ace
t he cr t soc k et cove r .
V er ify t he -2 kV s upp l y at pin
2 of t he cr t soc k et .
T h e vo l tage shou l d be b etwee n -1900 a nd -2100 V .
W A RN I N G
T h e Pr er egu l ato
r a nd I n ve r te r ci rcu its h ave ο fl oati ng
comm on r efere nce wit h r es p ect to ch assis g
ro und .
Ac-so urce p
ote n tia l is pr ese n t on t he co m mo n r efe ren ce
poi n ts . Conn ect t
h
e i nst ru me n t to
t he ac- powe r source
t hr oug
h
an
iso l atio n t ra nsfo r me r to pr eve n t t he p os-
si b i l ity of p e
r
so
na l i n
j
ur y or e qu i pm en t d am age wh e n
t r oub l es h ooti ng t h ese ci rcu its . W
h
e
n
an a u
tot ron sfo rm e r
is
a l
so
u se d in t he t r o ub l es h ooti ng pr ocedur e, co nn ect
t h e iso l atio n t ran sfo r me r to t h e ac- p owe
r
so
ur ce, t hen
co
nn ect t he a u tot ron sfo r me r to t h e i so l atio n t ra
n sfo r me r .
F i na ll y, p l ug t he instrument
p owe r cord i n to t he auto-
transformer ou
t
l et
.
T RO UBLE SH OOT I NG
GU I D E
SET I N I T I AL
FR ON T- PA NEL
CO NT RO L S E TT I N GS
(NOTE 1)
CO NNE CT P OWER CO
R
D
TO
Λ SU I TA BLE AC-
P OWER SOUR C E AND
A PPL Y P O WER TO
ΤΗΕ I N ST RUMEN T
VER I FY L OW
V OL TAG E S UPPL I ES
AND -2kV S UPPL Y
A RE IN TO LER A N CE
(NOTE 2)
Ι
α
Α ;
Vi l
Ι
α
ι .~ y
NUMBER IND I CAT E
I
SC HEM AT I C D I ACI N
SUPPLY T E ST POINT
TO LERANC E
-8 .6V
ΤΡ 50 θ -8 .56 το -8 .64 V
+8 .6V W975
8 .34 to 8 .86 V
+5 V W985 4 .75 το 5 .25 V
+30 V
W965 28 .5 to 31 .5V
+10 Θ V W966 95 το 105 V