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Troubleshooting
Troubleshooting quality problems
980541-001 Rev. A P640i Card Printer User Guide 23
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. Reference Technical Note 4
• Black stripe means non-functioning
circuit(s) on printhead. If so, replace
printhead, Reference Technical Note 4,
but first check that it is not the result of
an image size change not followed by
power cycling the printer.
• 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.
• White spots like these may be caused by
card surface imperfections.
Image not centered on card
• Properties > Device Settings > Printer
Adjustment > Horizontal/Vertical Offset.
• Correct this by increasing horizontal (X)
offset, decreasing vertical (Y) offset.
Image missing at top or bottom of card
• Ribbon folded over at edge. Slacken ribbon by pulling more out of supply roll, unfold
edge then press RIBBON button to re-sync. Reference Technical Note 4
• Bottom edge and/or right hand edge of image missing could be card layout application
sending wrong image size (should be 952 x 578 pixels). Select appropriate image size (if
available) in Preferences, or modify layout application.
• Could be on either edge. Almost certainly due to ribbon fold-over, but could be a head
non-pivoting problem, or an image size problem.