Service Section Format - HP 8340A Service Manual

INTRODUCTION
The 8340A Service Section is structured to minimize the time it takes to troubleshoot a
HP
problem. The following text describes the format of the Service Section and provides important
information concerning its use.
SECTION FORMAT
General Information
The beginning of Section VIII contains general information concerning safety, required tools,
and the location of instrument interconnects and mnemonics.
Overall Theory of Operation
An Overall Instrument Theory of Operation is supplied that includes an overall block diagram
of the instrument. A description of the instrument's stored Calibration Constants is also
provided.
Troubleshooting Aids
This part of Section VIII contains descriptions of the troubleshooting aids that are built into the
instrument. These aids are: the instrument Self-Test, Digital Signature A.nalysis (DSA), Direct
I/O Addressing, and front panel Diagnostics.
Overall Instrument Troubleshooting
This is the single most important part of the Service Section. This troubleshooting guide will
allow the repair person to begin troubleshooting with a symptom and lead him or her to one of
the eight major functional areas of the instrument (see below). In many cases this guide leads the
troubleshooter directly to the faulty assembly.
Repair
This section contains warnings and cautions concerning the repair of the
extremely important that these precautions are implemented when repairing the instrument. A
description of the microcircuit field exchange program and after-service safety checks is also
included.
Model 8340A - Service

SERVICE SECTION FORMAT

Scans by HB9HCA and HB9FSX
8340A. It is
HP
8-3