Model3490A
Table
of
Contents
rABLE
OF
CONTENTS
(Cont,d)
Section
V
(cont'd)
Page
Section
page
5-18.
Ätemate
Method
. .
... .5-2
VII.
TROUBLESHOOTING
AND
5-2O-D0Common-ModeRejectionTest ......5-2
CIRCUITDIAGRAMS
.......7-l
5-22.
A9Common-ModeRejectionTest
......54
7-1.
Introduction
...7-l
5-24-
AC Normal-Mode
Rejection
Test
..
......54
7-3.
Preliminary
Troubleshooting
...
...
. . .7-l
5-26.
DcVoltmeterlnput
7'5.
TroubleshootingTrees
........7-l
Resistance
Test
..
....
.54
7-7-
Access
for
Servicing
..
. .7-l
5-28.
AcVoltmeterlnput
7--9.
PowerSupplyChecks
........7-l
ImpedanceTest.
.....S-5
7-13.
DCAnalogCircuits
....7-2
5-30. Sampli/Hold
Performance
7-15-
,{2
Assembly
Exchange
.
. . .
.7-2
(Option04OlO45)
.....5-5
7-17-
DCAmplifierChecks
.......7-2
5-32. Sample/Hold DC Measurement
7-22.
DC
Amplifier
Switching
Circuits
.
. . .
.7-3
AccuracyTest..
......54
7-25.
ReplacementofQCR3Ol
....7-3
5-34.
Sample/Hold Response
Test
...
..5-6
7-27.
A-to-D
Conversion
Circuit
Checks
.
..
. .7-3
5-36. RatioPerformance(Option080)..
......5-7 711.
IntegratorTroubleshooting
..........74
5-38. DC/DC Ratio
Accuracy
Tests
541. AClDCRatioAccuracyTest
.....5-g
737'
OhmsConverterTroubleshootlng.....74
543-
ExternalReferenceinput
!19
DisplayTroubleshooting
............7-s
ResistanceTest..
.....5-8
t4z'
LogicTroubleshooting
545. GPIB
Operational
Check
(Option
030)
..
.5-8
- ,6 _
Suggestions
..
. . .
..
.7-5
547.
General
Test Procedure
.
.-.
.
.
. .
5-l I
t4ö-
Data
Output
Troubleshooting
549.
Test Procedure
Using
(Option
O2l) .
. . .
. .7-5
Model
98204
Calcrilator
. . .
. .
5-l
l
7-50.
Remote
Control
Troubleshooting
5-51.
AdjustmentProcedures...
.....5-14
(OptionO22)
.
.....7-5
5-53. PowerSupplyAdjustment
......5-14
t-)2'
GPIBTroubleshooting
5-55.
DCZeroAdjustments..
.......5-15
(Option030)
.
.....'l-5
5-57.
ReferenceAdjustments...
.....S-15
!-)5'
GeneralChecks
......7-s
5-59.
DC
Amplifier
Adjustments
561.
ACCorrverterAdjustments
.....5-15 !'t7'
ExternalTriggeiCircuitCheck.
.....74
563.
lVRangeAdjüstments
......s-15
1-t?'sample/HoldSJrvicing
........74
544.
l0VRangeAdjustments
.....5-16
!-bu'
AccesstoSample/HoldCircuits
.....74
5-65.
100
V
Range
Aäjustments
.
. .
.
5-16
743'
Operating
the
3490A
with
5-66.
OhmmeterAdjustments..
......5-16
Sample/HoldAssembliesRemoved..T6
5-69.Sample/HoldAdjustments.
.....5-16
!t2
Sample/HoldTroubleshootingTrees...T4
5-71.
Offset
Gain
Adjustment
. ..
.. .5-16
t4'1.
Ratio
Troubleshooting
. . ..
. . ..7-8
5-73.
Offset
Adjustment
.
. . .5-17
749-
External
Reference
Amplifier
5-75.
Dielectric
Absorption
Adjustment
.
.. .5-17
Checks
.
.
. .
.7A
5-77.
Response
Adjustment
......
..
S-iA
t^'
5-79.
Ratio
Reference
Adjustments
. .
.5-lg
r.
7'73.
Reference
Polarity
Logic
Checks
.
.
.
. 7-8
7-75.
SchematicNores.
.....7_g
Section
page
7'77.
Logic
Gate
Symbols
.
. .
.7-g
VI.
REPLACEABLEPARTS
......6-I
SCCtiON
PAgE
6-1.
Introduction
...6:l
VlI.
BACKDATING
....
... .8_l
6-1
Orderinglnformation
........6_l
g_1.
Introduction
.....g_l
6-6.
Non-Listedparts
.
.....6-l
g_3.
Change
Sequence
........
g_l
6-8.
ProprietaryParts.
.....6-l
g-5. partsNotUsted.
........g_l
APPENDICES
A.
Code
List
of Manufacturers
B.
Sales
and
Service
Offices
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