User's Manual

Troubleshooting
Print Quality Problems
980541-003 Rev. B Zebra P630i & P640i Card Printer User’s Manual 87
Example • There are non-printing horizontal lines (white) on the card surfaces.
• Possible Cause:
Ribbon is not correctly positioned.
Solution:
Ensure that the ribbon is properly rolled onto the ribbon cores and that there are no
wrinkles in the ribbon.
Replace ribbon; see “Installing the Ribbon” on page 15
• Possible Cause:
Printhead is dirty.
Solution:
Clean the printhead; see “Printhead Cleaning” on page 81.
• Possible Cause:
Printhead elements are damaged (e.g., scratched or burnt).
Solutions:
Replace the printhead; contact Zebra Customer Service.