Troubleshooting; Introduction; Localizing The Problem; Chapter Organization - Agilent Technologies 6571A Service Manual

Troubleshooting

Shock Hazard: Most of the procedures in this chapter must be performed with power applied and
protective covers removed. These procedures should be done only by trained service personnel aware of
the hazard from electrical shock.
This instrument uses components that can be damaged or suffer serious performance degradation due to
ESD (electrostatic discharge). Observe standard antistatic precautions to avoid damage to the
components (see Chapter 1).

Introduction

Localizing the Problem

This chapter provides troubleshooting and repair information for the power supply. Before beginning troubleshooting
procedures, make certain the problem is in the power supply and not with an associated circuit, the GPIB controller (for
system power supplies), or ac input line. Without removing the covers, you can use the Verification tests in Chapter 2 to
determine if the power supply is operating normally.

Chapter Organization

The information in this chapter is organized as follows:
Topic
Test Equipment Required
Troubleshooting Procedures
Post-Repair Adjustments
Disassembly Procedures
Equipment required for completing all the tests in this chapter.
A series of flow charts for systematic location of defective boards, circuits, and
components.
An explanation of the error codes and messages generated during the power-on
selftest.
Signature analysis techniques for troubleshooting the digital circuits on the front panel.
primary, and secondary interface circuits .
Specific paragraphs for:
•
Checking the bias and reference supplies.
•
Troubleshooting the CV/CC status annunciators.
•
Troubleshooting the A3 FET board.
Calibration and EEPROM initialization procedures required after the replacement of
certain critical components.
Gaining access to and/or replacing components.
Information Given
3
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