Users Manual Part 4

Diagnostics and Troubleshooting
TroubleshootingTroubleshooting—Printing Issues
134
P1106464-001 ZT411/ZT421 Color Touch User Guide 5/9/19
Missing Print
Issue Possible Cause Recommended Solution
Long tracks of missing
print on several labels
Print element damaged. Call a service technician.
Wrinkled ribbon. See wrinkled ribbon causes and solutions in
Ribbon Issues on page 136.
Loss of Registration
Issue Possible Cause Recommended Solution
Loss of printing
registration on labels.
Excessive vertical drift
in top-of-form
registration.
The platen roller is dirty. Clean the printhead and platen roller. See Clean
the Printhead and Platen Roller on page 102.
Media guides are positioned
improperly.
Ensure that the media guides are properly
positioned. See Load the Media on page 17.
The media type is set
incorrectly.
Set the printer for the correct media type
(gap/notch, continuous, or mark).
The media is loaded incorrectly. Load media correctly. See Load the Media
on page 17.
Misregistration/skips
labels
The printer is not calibrated. Calibrate the printer. See Calibrate the Ribbon
and Media Sensors on page 92.
Improper label format. Check your label format, and correct it as
necessary.
Misregistration and
misprint of one to three
labels
The platen roller is dirty. Clean the printhead and platen roller. See Clean
the Printhead and Platen Roller on page 102.
Media does not meet
specifications.
Use media that meets specifications. See Media
Specifications on page 191.
Vertical drift in top-of-
form position
The printer is out of calibration. Calibrate the printer. See Calibrate the Ribbon
and Media Sensors on page 92.
The platen roller is dirty. Clean the printhead and platen roller. See Clean
the Printhead and Platen Roller on page 102.
Horizontal movement
in placement of the
label image.
The previous labels were torn
off incorrectly.
Pull down and to the left when tearing off labels
so that the tear-off bar assists in tearing through
the label backing. Pulling up or down and to the
right can shift the media sideways.
DRAFT