Table Of Contents - Agilent Technologies 668xA Service Manual

Introduction ............................................................................................................................................................................ 7
Scope................................................................................................................................................................................... 7
Organization..................................................................................................................................................................... 7
Instrument Identification..................................................................................................................................................... 7
Related Documents .......................................................................................................................................................... 8
Change Sheet................................................................................................................................................................. 8
Operating Manual.......................................................................................................................................................... 8
Manual Revisions............................................................................................................................................................. 8
Firmware Revisions ......................................................................................................................................................... 8
Safety Considerations ......................................................................................................................................................... 9
Conventions ........................................................................................................................................................................ 9
Electrostatic Discharge ....................................................................................................................................................... 9
Verification............................................................................................................................................................................ 11
Introduction....................................................................................................................................................................... 11
Tests .................................................................................................................................................................................. 11
Test Equipment Required.................................................................................................................................................. 11
List of Equipment........................................................................................................................................................... 11
Current-Monitoring Resistor .......................................................................................................................................... 11
Electronic Load .............................................................................................................................................................. 12
Programming The Tests .................................................................................................................................................... 13
General Considerations .................................................................................................................................................. 13
Programming Parameters ............................................................................................................................................ 13
General Measurement Techniques .................................................................................................................................... 13
Performance Test Record Sheets ...................................................................................................................................... 13
Operation Verification Tests ............................................................................................................................................. 14
Performance Tests............................................................................................................................................................. 14
Constant Voltage (CV) Tests ......................................................................................................................................... 14
Test Setup.................................................................................................................................................................... 14
Test Procedures ........................................................................................................................................................... 14
Constant Current (CC) Tests .......................................................................................................................................... 19
Test Setup.................................................................................................................................................................... 19
Test Procedures ........................................................................................................................................................... 19
Averaging the CC Measurements................................................................................................................................... 23
Troubleshooting .................................................................................................................................................................... 31
Introduction....................................................................................................................................................................... 31
Localizing the Problem .................................................................................................................................................. 31
Chapter Organization ..................................................................................................................................................... 31
Test Equipment Required.................................................................................................................................................. 32
Troubleshooting Procedures ............................................................................................................................................. 32
Power-On Selftest .......................................................................................................................................................... 32
Description .................................................................................................................................................................. 32
Disabling The Power-On Selftest................................................................................................................................ 32
Using the *TST? Query (GPIB Systems Supplies Only) ............................................................................................ 32
Troubleshooting Charts .................................................................................................................................................. 34
Troubleshooting Test Points........................................................................................................................................... 34
Bias and Reference Supplies .......................................................................................................................................... 34
CV/CC Status Annunciators Troubleshooting ............................................................................................................... 53
A3 FET Board Troubleshooting..................................................................................................................................... 53
Signature Analysis ............................................................................................................................................................ 56
Introduction.................................................................................................................................................................... 56
Firmware Revisions ....................................................................................................................................................... 56
Test Headers................................................................................................................................................................... 57

Table of Contents

5