Diagnostics and Troubleshooting
Troubleshooting—Printing Issues
236
P1095460-001 ZT510 User Guide 6/28/17
Printing Issues
Barcode Does Not Scan
Issue Possible Cause Recommended Solution
The barcode printed on
a label does not scan.
The barcode is not within
specifications because the print
is too light or too dark.
Perform the Optimal Darkness and Speed Test
on page 225. Adjust the darkness or print speed
settings as necessary.
There is not enough blank
space around the barcode.
Leave at least 1/8 in. (3.2 mm) between the
barcode and other printed areas on the label and
between the barcode and the edge of the label.
Print Consistently Too Light or Too Dark
Issue Possible Cause Recommended Solution
Printing too light or
too dark over the entire
label
The media or ribbon is not
designed for high-speed
operation.
Replace supplies with those recommended for
high-speed operation. For more information, see
http://www.zebra.com/supplies.
The printer is set at an incorrect
darkness level.
For optimal print quality, set the darkness to the
lowest possible setting for your application. You
may want to perform the Optimal Darkness and
Speed Test on page 225 to determine the ideal
darkness setting.
See DARKNESS on page 108 for how to change
the darkness setting.
You are using an incorrect
combination of media 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.
Incorrect printhead pressure. Set the printhead pressure to the minimum
needed for good print quality. See Adjust the
Printhead Pressure and Toggle Position
on page 185.
Printing too light or
too dark on one side of
the label
Uneven printhead pressure. Adjust the printhead pressure as needed for good
print quality. See Adjust the Printhead Pressure
and Toggle Position on page 185.