Table Of Contents - Keithley 181 Service Manual

TABLE OF CONTENTS
(CONTINUEDI
TITLE PAGE
Maintenance .........................................................................................
5-l
General ........................................................................................... ...5- 1
RecommendedTestEquipment..........................................................................5- 1
VoltageDivider........................................................................................6 -1
EnvironmentalConditons
.............................................................................
..5 -2
CalibrationProcedure ................................................................................ ..5~ 2
Installation of the Calibration
Cover ......................................................................
.5-2
AIDCalibration(ZVRangel ..........................................................................
...5 -2
lOMegAdjustment.....................................................................................5~ 3
20VRangeAdjustment.................................................................................5 -3
200VRangeAdjustment................................................................................5~ 3
lOOOVRangeAdjustmant...............................................................................5- 3
DIACalibration
.....................................................................................
..5~ 3
NanovolrPreampCalibration
..........................................................................
..5~ 3
Troubleshooting.......................................................................................5- 4
Special Handling of Static Sensitive Devices
.............................................................. .5-4
Line Power
...........................................................................................
5-4
AIDConverterandDisplay..............................................................................5 -7
DisplayBoard ......................................................................................
...5 -9
Nanovolt Preamp Noise Troubleshooting
................................................................. .5-9
Preamp NoiseTroubleshooting Checks
..................................................................
.5-9
ChecksofPreampZero.................................................................................5- 9
BufferCheck.........................................................................................5-1 2
InputCurrentCheck
................................................................................
...5-1 2
BootstrapCheck..
..................................................................................
..5~12
LowNoiseSupplyCheck...............................................................................5~1 2
CurrentBiasCheck..
................................................................................
..5~12
InputFETReplacemenr ............................................................................
,.,.5-l 2
NanovoltPreampTroubleshooting.......................................................................5-1 3
DC Volts Attenuator Troubleshooting
...................................................................
,513
lEEEBusCircuitTroubleshooting........................................................................5-1 3
DIACircuitTroubleshooting............................................................................5-1 3
SwitchlnputSectionTroubleshooting....................................................................5-1 3
DigitalTroubleshooting
..............................................................................
..5~15
SECTION
5
5-l
5-2
5~3
5-4
5-5
5-6
5-7
5-6
5-9
5-10
5-11
5-12
5-13
5-14
5.15
5-16
5-17
5-18
5.19
5-20
5-21
5-22
5-23
5-24
5-25
5~26
5-27
5-26
5-29
5-30
5-31
5-32
5-33
6
6-1
6-2
6-3
6-4
6-5
Replaceable Parts. .......
General ..................
Ordering Information ......
Factory Service ...........
Component Layouts .......
Schematics ...............
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.........
.........
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.6-l
..6-1
,.6-l
,.6-l
..6-1
..6-1
AppendixA............,,..,..,,.,....................,...............................................A-l
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