Users Manual Part 4

133
Diagnostics and Troubleshooting
TroubleshootingTroubleshooting—Printing Issues
5/9/19 ZT411/ZT421 Color Touch User Guide P1106464-001
Issue Possible Cause Recommended Solution
General print quality
issues
The printer is set at an incorrect
print speed or darkness level.
Keep in mind that printer
settings may be affected by the
driver or software being used.
For optimal print quality, set the print speed and
the darkness to the lowest possible settings for
your application.
1. Perform the steps in Run the Print Wizard
and Print a Test Label on page 49.
2. If necessary, manually adjust the darkness or
print speed settings.
• Set the print darkness to the lowest setting
that provides good print quality. If you set
the darkness too high, the label image may
print unclearly, barcodes may not scan
correctly, the ribbon may burn through, or
the printhead may wear prematurely.
• Slower print speeds typically yield better
print quality.
Access the darkness and print speed
settings from the Home screen by touching
Menu > Print > Print Quality.
You are using an incorrect
combination of labels and
ribbon for your application.
1. Switch to a different type of media or ribbon
to try to find a compatible combination.
2. If necessary, consult your authorized Zebra
reseller or distributor for information and
advice.
The printhead is dirty. Clean the printhead and platen roller. See Clean
the Printhead and Platen Roller on page 102.
Incorrect or uneven printhead
pressure.
Set the printhead pressure to the minimum
needed for good print quality. See Adjust the
Printhead Pressure on page 93.
The label format is scaling a
font that is not scalable.
Check the label format for font issues.
Angled Gray Lines on Blank Labels
Issue Possible Cause Recommended Solution
Fine, angular gray
lines on blank labels
Wrinkled ribbon. See wrinkled ribbon causes and solutions in
Ribbon Issues on page 136.
DRAFT