Zebra Technologies GX420t 사용자 설명서

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Troubleshooting
Print Quality Problems
82
980612-001 Rev. A
GX420t / GX430t User Guide
12/14/07
Print Quality Problems
No print on the label.
• The media may not be direct thermal media when printing without ribbon (i.e. thermal 
transfer). See the test procedure 
.
• For thermal transfer printers, the media may not be outside wound or approved for use in 
the G-Series printer. See the following ribbon test procedures: 
 an
• Is the media loaded correctly ? Follow the instructions for 
 
in the Getting Started section. For printing using transfer ribbon, see 
The printed image does not look right.
• The printhead is dirty.  Clean the printhead.
• The printhead is under temperature.
• Adjust the print darkness and/or print speed. 
Use  the 
^PR
 (speed) and 
~SD
 (darkness) commands referenced in the ZPL 
Programming Guide. 
Use  the 
D
 (darkness/density ) and 
(speed) commands in the EPL Programmer’s 
Guide. 
Manually adjust print darkness with the six-flash sequence of 
The Windows printer driver or application software may change these settings and 
may  require a change to optimize print quality.
• The media being used is incompatible with the printer. Be sure to use the recommended 
media for y our application, and always use Zebra-approved labels and tags.
• Verify that the printer power supply in use is rated at 100 Watts of DC output.
• The printhead has worn out. The printhead is a consumable item and will wear out due to 
friction between the media and printhead. Using unapproved media may shorten life or 
damage y our printhead. Replace the printhead.
• The platen may need cleaning or replacement. The platen (driver) roller maybe losing 
traction due to:
Foreign objects attached to its surface, 
The rubbery  smooth surface has become polished and slippery, or
There is damage to the normally smooth and flat print surface such as box knife cuts.