Zebra )300 User’s Guide

Troubleshooting

Table 4. Troubleshooting

Symptom

Diagnosis

Action

Power light does not

Printer is not receiving

Make sure that the power supply is plugged

turn on when Power

power.

into the printer and into a wall outlet, power

switch is turned on.

 

strip, or other source of power.

When printer is first

Printer failed an inter-

Turn the printer power off and then back on.

powered on, the Fault

nal diagnostic test.

If the symptom persists, call a service tech-

light remains on.

 

nician.

Fault light is flashing.

Printhead is open.

Close printhead.

 

 

 

 

Out of media or media

Load media correctly. Make sure that the

 

incorrectly loaded.

media is placed on the inside edge of the

 

 

platen roller and that it feeds straight

 

 

through the printhead otherwise it may not

 

 

be detected by the media sensor.

 

Printhead is over-

Allow printer to cool. Printing resumes

 

heated.

automatically when the printhead element

 

 

cools to operating temperature.

Long tracks of missing

Printhead is dirty.

Clean the printhead. See Table 3 on page 18.

print (blank vertical

Print element is dam-

Call a service technician to replace the print-

lines) on several labels.

aged.

head.

Misregistration (print-

Printer needs to be

Recalibrate the printer. See “Calibration” on

ing does not start at the

calibrated.

page 15.

top of the label) and

 

 

misprint of 1 to 3

 

 

labels.

 

 

A label format was sent

Communications

For serial communication, make sure that

to the printer but not

parameters are incor-

the baud rates of the printer and the com-

recognized.

rect.

puter match. Also, make sure that the cor-

 

 

rect com ports on the PC are selected.

 

Data cable not correct

Make sure the data cable is installed cor-

 

or not connected cor-

rectly if serially connected. For serial opera-

 

rectly.

tion, make sure you are using a “null

 

 

modem” cable.

Printer appears to oper-

Non-thermally sensi-

Make sure that you are using direct thermal

ate, but nothing prints.

tive material.

label, ticket, or tag stock. Zebra recom-

 

 

mends using genuine Zebra media in your

 

 

printer for best results.

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