Tektronix 2235 User Manual

GENER A L N
OT E S
Α .
U se sc hem atic
d
iag r ams, t
h
e ove ra ll b l oc k
d iag r am, circu it b oa rd i ll ustr atio n s, a nd
circu it d esc r i p tio n s w hen ana l yzi n g i nst rum
e
n t
ma l f un ctio n s a nd locati ng test poi n ts . The
sch ematic d iag ra m s i nc l ud e typ ica l wavefo rm s
a nd vo l tages t h
at a
r
e i
n
te nd ed as an ai d
in t ro ub l es h ooti ng .
θ
.
A l ways set t
h
e
P
O WER switc h to O FF a nd unp l ug
t he li ne cord b efo re swa pp i n g, r em ovi n g, or
r ep l aci n g com ponen ts, a nd b efo re
co
nn
ecti ng or
d isconnecti ng i nst rum en t lea ds a nd ca b l es .
C . Wh en ana l yzi n g
ci
r
c u it ma l f un ctio n s, consi der
co nn ecto rs a nd ca b l es as p ossi b l e ca u ses of
fai l ur e .
S PE C I F I C NOT E S
1 .
Set initial f r o n t-pane l co n t ro l s as fo ll ows :
2 . Ver ify t h
e low-vo l tage p owe r s upp l ies at t h e
fo ll owi n g test poi n ts :
S UPPL Y

T
E ST POINT

TO LER AN CE
+5 .2 V

W 968

5 .04 το 5 .36V
+8 .6 V

W 960

8 .43 το 8 .77V
-8 .6 V

ΤΡ 961

-8 .56 το -8 .64V
+30 V

W 956

29 .1
to 30 .9V
+1 00 V

W 954

97 το 103 V
Ver 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 and -210OV .
3 .

WARN I N G
T he Pr er eg u l ato r a nd I n ve r te r
ci
r
c u its h ave ο f l oati ng
comm o n r efe re n
ce wit h r es p ect to ch assis gro und .
Ac-so urce p ote n tia l is pr ese n t on t h e commo n r efe r
e
n
ce
poi n ts . Conn ect t he i nst rume n t
to
t h
e ac- p owe r source
t hr o
ug
h
an iso l atio n t ra n sfo r me r to pr eve n t t he p os-
si b i l ity of pe r sona l Injury or e qu i pm en t d amage w h en
t ro ub l es h ooti ng t h ese ci rcu its .
T RO UBLE SH OOT I N G
GU I DE
SET I N IT I A L
FR ON T- PA NEL
CO NTR O L SE TT
I
N GS
(NOTE 1)
CO NNE CT PO WER CO RD
TO
Α SU
I
TA BLE
AC-
P OWER SOUR CE A ND
A PPL Y PO WER TO
THE I N ST RUMEN T
P O WER Switc h

ON ( bu tto n in)

DO ES Α
Α I NT ENSITY

Midr an ge

B AS E L I NE T R AC E
F OC U S

Midr an ge

A PPE A
R?
V er tica l P OS I T I ON

M i dr an ge
VER TICA L
M
OD E C H 1
CH 1 V OL TS/D I V

Θ .1 V

NO
CH 1 V OL TS/D I V Var iab l e Ca l
d ete
n
t
CH 1 AC-G N O-DC

GNO
H or izo n ta l P OS I T I ON

M i dr an ge

PUS
H
IN A N D
H
O
R
I ZO N TA L MODE

Α

HOLD
BEAM
F I ND
Α SE C/D I V

θ .1ms

PU S H BU TTO N
Α S E C/D I V Var
ia b l e

Ca l
d
ete n t
Χ 1
θ Mag n ifie r Off (knob in)
Α T R I GGER Mode

Ρ-Ρ AU TO
ΑδΒ ΙΝΤ

VER T
MOD E
Α SOUR
CE

ΙΝΤ
DO ES Α
~ Y E S
B AS E L I NE T R AC E r- -i
A PPE A R?
NO
VER I FY L OW
NOTE

VOLTAGE SUPPLIES
A N D -2 kV S UPPL Y
Α HV probe is r e qu i red to meas ur e t he -2 kV s upp l y .

A RE IN TO LER ANCE
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

(NOTE 2)
co nn
ectio ns to t he osci ll osco pe . Set t he vo l tmete r
1 ο r ea d at least -3 kV , t hen t urn t h
e osci ll osco pe
p owe r b ac k
on to ta
k
e
t
he r ea d i ng . Afte r ob tain i ng
t he r ea d i n g, t urn off t he osci ll osco pe p owe r
to
d isconn ect t he test e qu i pm en t
co
nn
ectio n s, a nd
r
ep l ace t
h
e c r t soc k et cove r .
A
RE
A
LL
P O WER S UPPL Y
V OL TAG E S
0
Κ
? /
YES
Y ES
NO
NUMBER I N DII
SC HEM ATIC D

Tektronix 2235 Specifications

General

Brand	Tektronix
Model	2235
Category	Test Equipment
Language	English