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Troubleshooting and Pen Alignment
of Recorder with Display
12/03 DR4300 Circular Chart Recorder Product Manual 171
8. Troubleshooting and Pen Alignment
of Recorder with Display
8.1 Overview
Introduction
This section explains how to troubleshoot the recorder models having display and keypad. Troubleshooting
uses self-diagnostic test results and error messages as well as some observable symptoms of failure.
• To reduce recorder down-time, this section enables tracing trouble to a printed circuit assembly
(PCA)/hardware assembly level rather than to an individual component.
• While troubleshooting is straightforward, we recommend that only trained service technicians repair
the recorder. SEE THE SHOCK HAZARD WARNING BELOW.
This section also includes instructions for aligning the pens
What’s in this section?
The following is a list of the topics covered in this section.
Topic See Page
8.1 Overview 171
8.2 Troubleshooting Aids 173
8.3 Self Diagnostics 174
8.4 Observable Symptoms of Failure 179
8.5 Troubleshooting Procedures 180
8.6 Alignment of Pen at Zero and Span 188
WARNING—SHOCK HAZARD
!
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.