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I-Class Mark II Maintenance Manual
Troubleshootin
3.0 Introduction
This section covers techniques for isolating and correcting printer problems.
3.1 Troubleshooting
Use the following procedures to isolate and correct malfunctions. When problems are isolated to a Printed
Circuit PCB (PCB), assembly replacement is suggested, as component level repair is not generally feasible in
the field.
Note: Unless otherwise noted, see the Operator’s Manual for configuration, interfacing and setup
information.
3.1.1 Initial Steps
CAUTION
(1) Before servicing always unplug the printer; (2) ensure that the unit has been
placed on a level, stable surface; and, (3) use extreme care if measuring voltages.
Perform the following actions before troubleshooting then proceed according to the symptom:
• Remove any dirt or dust accumulations (see Section 2.4);
• Confirm that the AC outlet voltage is within specification;
• Confirm that the environment is acceptable;
• Confirm correct media and loading; and,
• If installed, disable the Present Sensor.
3.2 General Problem Resolution
When troubleshooting, if the problem is not accompanied by an error message, begin with Problem Isolation
(Section 3.2.1). Follow the flowchart steps then take the appropriate action to find the defective item (listed
by probability) or, when necessary, further instructions.
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