980541-001 Rev. 1 12-06-04 P630i/P640i User Guide Part 1 Section 3-5
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.
TN4
• 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. TN2
• Check printed card for damage on corners or edges.
Example: the card may be scraping along the underside
of the hopper base molding.
TN2
• Printhead pressure too light. TN4
• Printhead may be running hot. Will occur if head resis-
tance incorrectly entered in driver software. TN4
• Toothed transport belt pulley may be slipping on drive
shaft. Tighten set screws (make sure the screws bear on
flats on the shafts).
Troubleshooting quality problems
Poor color rendering
• Possible source issues - poor quality photos or graph-
ics, card layout application settings. Isolate the problem
by printing a known image, such as Portraits.bmp,
through IDPrint Lite. TN8
• Vary brightness and contrast controls in Preferences >
Image Adjustment (preceding page). Fine tune if neces-
sary using Contrast Adjust in Properties > Device
Settings > Color Calibration. TN4
Faint, non-uniform image
• Printhead pressure too low. Adjust downward. TN4
• Printhead not pivoting freely. TN4
Continuous white or black stripes on card’s longer
dimension
• White stripe means blown pixel (non-functioning heating
element). One or two blown pixels in isolation may be
acceptable to some. Otherwise replace printhead.
TN4
• Black stripe means non-functioning circuit(s) on print-
head. If so, replace printhead, TN4, but first check that it
is not the result of an image size change not followed by
power cycling the printer.
Examples of printhead failures
The white line is a sign of a blown pixel. The
adjacent black stripe is a printhead driver prob-
lem (components on the head itself). These are
independent problems, not necessarily co-located.
Random occurences of white (unprinted) spots
• Possible card quality problem. Run IDPrint Lite with
graytone.bmp on cards from a different batch. Check
platen surface for specks of debris.
Possible card defects
White spots like these may be caused
by card surface imperfections.
Troubleshooting quality problems continued
Gaps in image at edges and corners
See graphic at top right
• Possible de-lamination/wear of platen’s rubber surface.
Try cleaning platen. If unsuccessful, replace platen. TN2
• Possible non-uniformity of card thickness, or card
surface defects.
Examples of platen surface problems
Examples of color mis-registration
Left is the test card in the printer’s firmware.
Right is an enlargement showing fringing on pro-
cess black text generated from Y, M and C
(68 pages)
(4 pages)
(116 pages)
(37 pages)
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