Troubleshooting quality problems, Poor color registration, Examples of color mis-registration – Zebra Technologies P640I User Manual
Page 32: Poor color rendering, Faint, non-uniform image, Gaps in image at edges and corners
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P640i Card Printer User Guide
980541-001 Rev. A
Troubleshooting
Troubleshooting quality problems
Troubleshooting quality problems
Poor color registration
•
Minor mis-registration of Y, M and C color passes may be due to printhead angle adjust
screw not in firm contact with printhead frame. Reference
•
For gross mis-registration of Y, M and C suspect card not firmly against left hand pick
edge of truck on one or more passes. Spring at left end of platen may be missing or bound
up. Reference
•
Check printed card for damage on corners or edges. Example: the card may be scraping
along the underside of the hopper base molding. Reference
•
Printhead pressure too light. Reference
•
Printhead may be running hot. Will occur if head resistance incorrectly entered in driver
software. Reference
•
Toothed transport belt pulley may be slipping on drive shaft. Tighten set screws (make
sure the screws bear on flats on the shafts).
Examples of color mis-registration
Left is the test card in the printer’s firmware. Right is an enlargement showing fringing on
process black text generated from Y, M and C.
Poor color rendering
•
Possible source issues - poor quality photos or
graphics, card layout application settings. Isolate
the problem by printing a known image, such as
Portraits.bmp, through IDPrint Lite. Reference
•
Vary brightness and contrast controls in
Preferences > Image Adjustment (preceding
page). Fine tune if necessary using Contrast
Adjust in Properties > Device Settings > Color Calibration. Reference
Faint, non-uniform image
•
Printhead pressure too low. Adjust downward. Reference
•
Printhead not pivoting freely. Reference
Gaps in image at edges and corners
•
Possible de-lamination/wear of platen’s rubber surface.
Try cleaning platen. If unsuccessful, replace platen.
Reference
•
Possible non-uniformity of card thickness, or card surface
defects.