Troubleshooting and Pen Alignment of Recorder without Display

7.Troubleshooting and Pen Alignment of Basic Recorder without Display

7.1Overview

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

7.1Overview

7.2Observable Symptoms of Failure

7.3Troubleshooting Procedures

7.4Alignment of Pen at Zero and 100 %

See Page

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163

164

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.

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