Zebra Technologies ZT400 manual 149

		Troubleshooting
		Printing Issues
	Table 2 • Printing Issues (Continued)
Issue	Possible Cause	Recommended Solution
Fine, angular gray	Wrinkled ribbon.	See wrinkled ribbon causes and solutions in
lines on blank labels		Ribbon Problems on page 151.
Printing too light or	The media or ribbon is not	Replace supplies with those recommended for
too dark over the	designed for high-speed	high-speed operation.
entire label	operation.
	You are using an incorrect	1. Switch to a different type of media or ribbon
	combination of media and	to try to find a compatible combination.
	ribbon for your application.	2. If necessary, consult your authorized Zebra
		reseller or distributor for information and
		advice.
	You are using ribbon with	Direct thermal media does not require ribbon. To
	direct thermal media.	determine if you are using direct thermal media,
		perform the label scratch test in When to Use
		Ribbon on page 18.
	Incorrect or uneven printhead	Set the printhead pressure to the minimum
	pressure.	needed for good print quality. See Adjust the
		Printhead Pressure on page 124.
Smudge marks on	The media or ribbon is not	Replace supplies with those recommended for
labels	designed for high-speed	high-speed operation.
	operation.
Misregistration/skips	The printer is not calibrated.	Calibrate the printer. See Calibrate the Ribbon
labels		and Media Sensors on page 119.
	Improper label format.	Check your label format and correct it as
		necessary.
Misregistration and	The platen roller is dirty.	Clean the printhead and platen roller. See Clean
misprint of one to		the Printhead and Platen Roller on page 132.
three labels
	Media does not meet	Use media that meets specifications. See Media
	specifications.	Specifications on page 176.
Vertical drift in	The printer is out of calibration.	Calibrate the printer. See Calibrate the Ribbon
top-of-form position		and Media Sensors on page 119.
	The platen roller is dirty.	Clean the printhead and platen roller. See Clean
		the Printhead and Platen Roller on page 132.

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4/8/14 ZT400 Series™ User Guide P1066582-002