Keithley 263

SECTION 7 - Principles of Operation
7.1 INTRODUCTION .........................................................................
7.2 OVERALL FUNCTIONAL DESCRIPTION.
...................................................
7.3 VOLTAGESOURCE
.......................................................................
7.4
OHMSSOURCE ...........................................................................
7.5 CURRENT SOURCES
......................................................................
7.5.1 Passive (AMPS V/R) Current Source
.......................................................
7.5.2 Active(AMPS)CurrentSource
............................................................
7.6
CHARGE SOURCES
.......................................................................
7.7
TEMPERATURECOMPENSATION
..........................................................
7.8 DIGITALCIRCUITRY
......................................................................
7.8.1 Microcomputer ..........................................................................
7.8.2 MemoryElements
.......................................................................
7.8.3
DeviceSelection
.........................................................................
7.8.4 IEEE-488Bus ............................................................................
7.9
DISPLAYCIRCUITRY
......................................................................
7.10 MAINPOWERSUPPLY
....................................................................
SECTION 8 - Maintenance
8.1
8.2
8.3
8.4
8.4.1
8.4.2
8.4.3
8.4.4
8.4.5
8.4.6
8.4.7
8.4.8
8.5
8.6
8.7
8.7.1
8.7.2
8.7.3
8.7.4
8.7.5
8.7.6
8.7.7
8.7.8
8.8
INTRODUCTION ............................................
LINE VOLTAGE SELECTION
..................................
FUSE REPLACEMENT.
.......................................
CALIBRATION ..............................................
Calibration Overview
.......................................
Recommended Calibration Equipment
........................
Environmental Conditions.
..................................
Cool-down Period
..........................................
Calibration Switch ..........................................
Calibration Record.
.........................................
Front Panel Calibration.
.....................................
IEEE-488 Bus Calibration Program
............................
SPECIAL HANDLING OF STATIC SENSITIVE DEVICES.
DISASSEMBLY INSTRUCTIONS
...............................
TROUBLESHOOTING ........................................
Recommended Test Equipment.
..............................
Power Up Self Test.
.........................................
Display Test and Software Revision
...........................
Power Supply Checks .......................................
Logic and Switching FET States.
..............................
VoltageSourceChecks
.......................................
Electrometer Amplifier Check
................................
Digital and Display Circuitry Checks.
.........................
HANDLING AND CLEANING PRECAUTIONS
.................
7-l
7-l
7-1
7-7
7-7
7-8
7-8
7-10
7-10
7-10
7-10
7-11
7-11
7-11
7-11
7-12
............................ 8-l
............................
8-l
............................ 8-1
............................ 8-2
............................ 8-2
............................ 8-2
............................ 8-2
............................ 8-3
............................ 8-3
............................ 8-3
............................ 8-3
............................ 8-10
............................ 8-13
............................ 8-13
............................ 8-15
............................ 8-15
............................ 8-15
............................ 8-16
............................ 8-16
............................ 8-17
............................
8-20
............................ 8-20
............................ 8-20
............................ 8-22
SECTION 9 - Replaceable Parts
9.1 INTRODUCTION .........................................................................
9-l
9.2 ELECTRICAL PARTS LISTS.
................................................................
9-l
9.3 MECHANICAL PARTS.
....................................................................
9-l
9.4
ORDERINGINFORMATION
............................................................... 9-l
9.5
FACTORYSERVICE.. .....................................................................
9-l
9.6
COMPLETE LOCATION DRAWINGS AND SCHEMATIC DIAGRAMS
..........................
Y-l
IV