Tektronix 2235 User Manual

T his section of the manual contains
information for conducting p reventive maintenance, troubleshooting, and corrective
maintenance on the 2235 Oscilloscope .
STATIC-S
EN SITI VE CO MP O NEN TS
T he following p recautions are
applicable when perform-

Table 6-1
ing any maintenance
involving internal access to the

S usceptibility
instrument .

to Static Discharge Damage
CA U TIO N
Static disc harge can damage
any
semico
n
d u
cto r
com p o n e n t i n t h is inst r ume n t .
T his instrument contains electrical components
that are
susceptible to d amage from static discharge .
Table 6-1 lists
the r elative susce p tibility of various
classes of semiconduc-
tors . Static voltages of 1 kV to 30
kV
are common
i n unpro-
tected environments .
When p erforming maintenance observe
the following pre-
cautions to avoid com p onent d amage :
1 . M inimize h andling of static-sensitive components .
4 . N othing capable of
generating or h olding α static
charge should b e allowed on
the work station surface .
5 .
K
eep the
component leads shorted together whenev-
er p ossible .
M AI NT EN A N C E
E CL
Semiconductor Classes
M OS or CMOS microcircuits or
discretes, or linear microcircuits
with MOS inputs .

(Most Sensitive)
Schottky signal d iodes
Schottky TTL
High-fre q uency bi p olar transistors
JFETs
L inear microcircuits
L ow-power Schottky TTL
TTL

(Least Sensitive)
Section 6-2235 Service
R
elative
Susceptibility
L evelse
2
3
4
5
6
7
8
9
2 . Transport and store static-sensitive
components
or
assemblies in their Original containers or on
α metal rail .

avoltage equivalent for levels : (Voltage d ischarged from α
L abel any p ackage that contains
static-sensitive compo-

100 pF capacitor t hrough α r esistance of 100
Ω
.)
nents or assemblies .

1 = 100 to 500 ν

α = 500 ν

7 = 400 to 1000 V(est .)
2=200to500V5=400to600V 6=900V
3=250V

6=600to800V 9=1200V
3 . Discharge the static voltage from your body b y
wear-
ing α grounded antistatic wrist strap
while h andling these
components . Servicing static-sensitive components
or as-

7 . Do not slide the components over any surface .
semblies should be performed only at α static-free
work
sta-
tion by qualified service p ersonnel .
8 .
Avoid h andling
components
in
areas
that h ave
α
floor
or work-surface
covering capable of generating α static
charge .
9
. U se α
soldering iron that
is
connected
to
earth
ground
.
6 . P ick up components by
their bodies, n ever by their

10 . U se

only

approved

antistatic,

vacuum-type
leads .

desoldering tools for component removal .

Tektronix 2235 Specifications

General

Brand	Tektronix
Model	2235
Category	Test Equipment
Language	English