Troubleshooting / Service; Overview - Honeywell DR4500A Product Manual

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9.1 Overview

SHOCK HAZARD—WARNING!
Disregard of these instructions may cause injury or death.
TROUBLESHOOTING MAY REQUIRE ACCESS TO HAZARDOUS LIVE CIRCUITS, AND
SHOULD ONLY BE PERFORMED BY QUALIFIED SERVICE PERSONNEL. MORE THAN
ONE SWITCH MAY BE REQUIRED TO DE-ENERGIZE UNIT BEFORE SERVICING.
Introduction
This section explains how to troubleshoot the DR4500A recorder using self-diagnostic test results and error
messages as well as some visual failure symptoms. Using an optimum replacement unit repair philosophy,
trouble is traced to a printed circuit board (PCB)/hardware assembly level rather than to an individual
PCB/hardware assembly component. While troubleshooting is straightforward, we recommend that only
trained service technicians repair the recorder.
What's in this section?
The following topics are covered in this section.
9.1 Overview
9.2 Troubleshooting Aids
9.3 Self Diagnostics
9.4 Visual Failure Symptoms
9.5 Troubleshooting Procedures
9.6 Pen Alignment
Types of problems
Instrument performance can be adversely affected by installation and application problems as well as
hardware problems. We recommend that you investigate the problems in the following order:

Installation related problems

Application related problems

Hardware and software related problems
and use the information presented in this section to solve them.
If a replacement of any part is required, follow the instructions shipped with the replacment part.
Release K DR4500A Classic Series Circular Chart Recorder With or Without Control Product Manual
May 2013

9. Troubleshooting / Service

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