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Troubleshooting and Pen Alignment
of Recorder without Display
12/03 DR4300 Circular Chart Recorder Product Manual 161
7. Troubleshooting and Pen Alignment
of Basic Recorder without Display
7.1 Overview
Introduction
This section explains how to use observable symptoms of failure to troubleshoot the recorder models that
do not have a display.
• 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
7.1 Overview 161
7.2 Observable Symptoms of Failure 163
7.3 Troubleshooting Procedures 164
7.4 Alignment of Pen at Zero and 100 % 169
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.