Tektronix 2235 User Manual

M ai n te n a n ce-2235 Service
27 . R
econnect
Ρ
9001 an d
Ρ
9002 to t h e M ain ci r cuit

t h at can be contacte d . Include complete instr u me n t serial
boar
d (remove d in
ste p
8) .

n u m b er a nd α descri p tion of t h e service requi r e d .
28 . Inse
r
t t
h
e
P
O
WER
switc
h
exte
n
sio
n
-s h aft assembly

Save and re u se t h e p ac k age i n w h ic h yo u r i n st r ument
into t
h
e
front
panel
(f r
om t
h
e rea
r ) .
Pu s
h
t h e P O WER switc h was s h ipped . If t h e origi n al pac k agi n g is u n fit for use or not
to t
h
e ON loc
k
positio
n
a nd align t h e exte n sion s h aft wit h available, re pac k age t h e instrument as follows :
t h
e
switc h
s
h aft . Pr
ess
t h
em toget
h
er gently un til t hey s n ap
into p lace .

Surround t h e instrument wit h polyet h yle n es h eeti n g to p ro-
tect its fi n is h . Obtain α carton of corrugate d ca rdb oar d h av-
ing α carton test strengt h of 275 p o u n ds and h aving inside
29 . R einstall t h e F OC U S control sh aft assembly (re-

dimensions of no less t h a n six i n c h es more t h a n t h e instru-
moved
in
ste p 6) .

ment dimensions . Cus h ion t h e i n str u me n t by tig h tly pac k ing
t h ree i n c h es of dunnage or uret h a n e foam b etwee n carton
a nd i n str u me n t, on all si d es . Seal carton wit h s h ipping ta p e
30 . R eco nn ect t h e co nn ectors to t h e Attenuato r a nd

o r i n dust r ial sta p ler .
Timing circuit boards (removed in ste p 5) .
S ELE CTA BLE CO MP O NEN TS
31 . R esolder five wires from t h e F ilte r ci r c u it board to
t h e M ain circuit board (unsoldered in ste p 4) .

If desired, t h e trigger-system bandwidt h of t h e oscillo-
scope may b e reduce d from t h e n ormal 20 MH z to fre q uen-
cies s h own i n Ta b le 6-6 . To alter t h e b a n dwidt h , remove
32 . R einstall t h e P ower-Supply s h ield a nd p lastic p ower-

C419 (compo n e n t nu m b er Al C419 on Diagram 3) f r om t h e
s upp ly cover (see " P ower-Sup p ly S h iel d " reinstallation

M ain Circuit B oard using t h e steps i n t h e "Sol d eri n g Tec h
p rocedure) .

ni q ues" part of t h e " M aintenance" sectio n . T h e ca p acitor
s h ould be α non-polarized ty p e suc h as α d isc-ceramic or
e q uivalent .
33 . R ei n stall t h e Alt Swee p circuit b oa r d (see "Alt
Sweep Circuit B oard" rei n stallatio n p rocedure) .
34 . R econnect t h eΒ DEL AY TIME P OSITIO N potenti-
ometer connector ( Ρ 9644) to t h e M ai n ci r c u it b oar d (discon-
nected in step 1) .
REP AC K AGI N G F O R S H I PMEN T
T r igge r Band wi d t h Alte r ation
T r igge r
B an d wi d t h
20 MH z
10 MHz
5 MHz
1
MHz
Ta b le 6-6
Ca p acito r
V al u e
180 pF
390 p F
750 pF
3300 pF
If t h e instrume n t is to b e s h i p ped to α Te k t r o n ix Service

50 kH z

0 .068
AF
Center for se r vice or r e p air, attac h α tag s h owing ; owner
(wit h a dd ress) and t he name of
an
i n
dividual at your firm

10 kHz

0 .33 μF

Tektronix 2235 Specifications

General

Brand	Tektronix
Model	2235
Category	Test Equipment
Language	English