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MAINTENANCE
Section 6— 2236 Service
This section of the manual contains information for conducting preventive maintenance, troubleshooting, and corrective
maintenance on the 2236 Oscilloscope.
STATIC-SENSITIVE COMPONENTS
The following precautions are applicable when perform
ing any maintenance involving internal access to the
instrument.
C A U T I O N
Static discharge can damage any semiconductor
component in this instrument.
This instrument contains electrical components that are
susceptible to damage from static discharge. Table 6-1 lists
the relative susceptibility of various classes of semiconduc
tors. Static voltages of 1 kV to 30 kV are common in unpro
tected environments.
When performing maintenance observe the following pre
cautions to avoid component damage:
1. Minimize handling of static-sensitive components.
2.
Transport and store static-sensitive components or
assemblies in their original containers or on a metal rail.
Label any package that contains static-sensitive compo
nents or assemblies.
3.
Discharge the static voltage from your body by wear
ing a grounded antistatic wrist strap while handling these
components. Servicing static-sensitive components or as
semblies should be performed only at a static-free work sta
tion by qualified service personnel.
4.
Nothing capable of generating or holding a static
charge should be allowed on the work station surface.
5.
Keep the component leads shorted together when
ever possible.
6.
Pick up components by their bodies, never by their
leads.
■Table 6-1
SUSCEPTIBILITY
TO STATIC DISCHARGE DAMAGE
Semiconductor Classes
Relative
Susceptibility
Levels*
MOS or CMOS microcircuits or
discretes, or linear microcircuits
with MOS inputs.
(Most Sensitive)
1
ECL
2
Schottky signal diodes
3
Schottky TTL
4
High-frequency bipolar transistors
5
JFETs
6
Linear microcircuits
7
Low-power Schottky TTL
8
TTL
(Least Sensitive)
9
'Voltage equivalent for levels: (Voltage discharged from a
100 pF capacitor through a resistance of 100 Q.)
1 = 100 to 500 V 4 = 500 V
7 = 400 to 1000 V(est.)
2 = 200 to 500 V 5 = 400 to 600 V
8 = 900 V
3 = 250 V
6 = 600 to 800 V
9 = 1200 V
7. Do not slide the components over any surface.
8.
Avoid handling components in areas that have a floor
or work-surface covering capable of generating a static
charge.
6-1
Summary of Contents for 2236
Page 10: ...2236 Service viii The 2236 Oscilloscope ...
Page 74: ...Theory of Operation 2236 Service 3 30 ...
Page 102: ...Performance Check Procedure 2236 Service 4 21 Figure 4 1 Test setup for DMM common mode check ...
Page 242: ...2236 Service 4204 34 Figure 9 6 CTM basic block diagram ...
Page 243: ...DMM POWER S U P P LIE S 2236 Service F ig u re 9 7 C T M d e ta ile d b lo c k diag ram ...
Page 254: ...S I 0 O I 5 1 S O i 4204 21 C IR C U IT BOARD INTERCONNECTIONS ...
Page 267: ...1 2 3 4 5 6 7 8 9 J T K L M_ _ ___ N___l _ P____l S ...
Page 271: ...1 2 3 4 5 6 7 8 9 lO P2SO O U1 A TRIGGER V T O W2500 5 A 223 R E V A P R W G ...
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Page 285: ...A 6 F IL T E R B O A R D lo c a te d u n d e r H V S h ie ld ...
Page 313: ...2236 Service T O U I 3 0 0 4 8 K T O UI300 II S K 0 2 2 3 6 Z Z O A Z 2 OPTION IA ...
Page 317: ...A 10 C O U N T E R T IM E R M U L T IM E T E R B O A R D A D J U S T M E N T LO C A T IO N S ...
Page 319: ...2236 Service TROUBLESHOOTING GUIDE 4206 99 4204 69A ...
Page 323: ...9 ...
Page 324: ...2 REV APR 1986 ...
Page 325: ...2236 SERVICE ...
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Page 333: ...2236 SERVICE ...
Page 334: ...2 4 2 1 ...
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