Tektronix 2235 User Manual

P
O
WER S UPPL Y ISO L ATIO N PR OC E D URE
Eac h regulated su pp ly h as numerous feed p oi n ts to

If
α p ower supp
ly
comes up after
lifti
n g one of t
h
e main
external loads t h roughout t h e instrument . T he power

jumpers
from
t
h
e p ower su pp
ly
to isolate t
h
at supp
ly,
it is
distrib u tion

diagram

is

used

i n

co nju nction

wit h

t h e

very p
robable t
h
at α s
h
ort exists
i n
t
h
e circuit
r y
on t
h
at su p -
sc h ematic diagrams to determine t h ose loa d s t h at can be

ply line . By lifting ju mpers fart h er down t h
e
line, t h
e
circuit in
isolated by removing service ju mpers and t h ose t h at cann ot .

w h ic h α sh ort exists may b e locate d .
T h
e powe
r
distri b ution a
n
d circuit b oar d interconnections

Always set t he PO WER switc h to O FF b efore sol d ering
diagrams are divided into circuit b oards . Eac h p ower supp ly

or un sol d ering service ju m p ers or ot h er components
and
feed to α
circuit
board is indicated b y t
h
e sc h ematic diagram

before attem p ting to measure compo n en t resista nce values .
num b er
on
w h ic h t h
e voltage a pp ears .
T h
e sc
h
ematic d ia-
gram
gri
d location of α service j um p er or com p one n t is given
ad j acent to t h e com ponent number on t he power distri bu -
tion
and circuit board
i n
te
r
co
nn
ect d iagrams .

Tektronix 2235 Specifications

General

Bandwidth	100 MHz
Channels	2
Vertical Sensitivity	2 mV/div to 5 V/div
Maximum Input Voltage	400 V (DC + AC peak)
Rise Time	3.5 ns
Vertical Resolution	8 bit
Input Impedance	1 MΩ || 20 pF
Power Requirements	90 to 250 V AC, 48 to 440 Hz
Trigger Modes	Auto, Normal, Single
Display	CRT
Weight	17 lb (7.7 kg)