89
Troubleshooting
Printing Issues
1/13/2016 ZD420 User’s Guide 212485-001 Rev. A
Vertical image or
label drift
The printer is using
non-continuous labels but is
configured in continuous
mode.
Set the printer for the correct media type
(gap/notch, continuous, or mark) and
calibrate the printer (Run a SmartCal Media
Calibration on page 40), if necessary (see
Manual Media Calibration on page 109).
The media sensor is
calibrated improperly.
Calibrate the media in the printer. See
Manual Media Calibration on page 109.
The platen (drive) roller is
dirty.
Clean the printhead and platen roller. See
Cleaning the Printhead on page 115 and
Platen Cleaning and Replacement
on page 124.
The media is loaded
incorrectly.
Ensure that the media is loaded correctly.
See Loading Roll Media on page 32 and
Test Printing with the Configuration Report
on page 41.
Incompatible media. You must use media that meets the printer
specifications. Ensure that the inter-label
gaps or notches are 2 to 4 mm and
consistently placed.
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 Printer Network Configuration
Report on page 99. 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) of blank
space around the barcode (referred to as
the quiet zone) and other printed areas on
the label and between the barcode and the
edge of the label. This requirement varies by
barcode type.
There is a void or missing
print in a barcode, text, or
graphic in a printed form.
Voids can look like a white
bar area in a barcode.
1. Preform Cleaning the Printhead
on page 115 to remove contaminants on the
printhead. Reprint and test the barcode.
2. The print material and transfer ribbon type
may not match - causing random voids.
3. Use the Printer Network Configuration
Report on page 99 to see if the printhead
has damaged printhead elements. Verify
that the large black bar on the bottom of the
printed test label does not have any streaks
or voids after throughly cleaning the
printhead. Call a service technician.
Table 2 • Printing Issues (Continued)
Issue Possible Cause Recommended Solution
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