Overview; Troubleshooting; Initial Steps; General Problem Resolution - Datamax M-Class Mark II Maintenance Manual

3.0 Overview

This chapter 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 Board (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

(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.
CAUTION
Perform the following actions before troubleshooting then proceed according to the
symptom:
Remove any dirt or dust accumulations (see Section 2.1);
•
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

To troubleshoot non-display models, or display-equipped models when no message is
generated, begin with Problem Isolation (Section 3.2.1). Follow the instruction under
Procedure then take the appropriate Action to find the defective item (listed by probability)
or, when necessary, further instructions.
Troubleshooting
3-1