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User Manual Model 676 LOKPRINT® Appendix C •
••
• 51
Printhead Fail Modes
Symptoms, Causes, Solutions
Symptom #1:
A dot is leaving a line in the print direction. The dot appears to be dragging or failed on,
sometimes in the print area, and sometimes not. If in a barcode, the verifier will halt the printer.
Cause: Paper dust or dirt on the printhead
causing the ink to print without printhead firing.
The dot is NOT failed on. The printhead is
DIRTY.
If not addressed immediately: the line will go
from black or gray to white and the dot will fail.
The printhead will be damaged.
Solution: Immediately stop the printer and clean the printhead in the machine.
If problem continues: Remove the printhead and clean with hard pressure.
Symptom #2:
Edges of barcode and text do not appear
crisp and sharp.
Cause: Strobe is too high. Printhead is dirty.
Solution: Reduce front panel strobe one increment at a time until
fuzzy printing goes away.
If problem continues: Clean the printhead as described below.
Symptom #3:
While printing along fine early in the printheads life (< 300,000 inches), a dot suddenly
appears missing. The verifier will halt the machine if the missing dot is in a barcode.
Cause: Most likely, the printhead failed from static.
Solution: Replace the printhead.
If problem continues: Check that the machine has all the static upgrades. Double check the connections
and wires.
Specialty
Brand
23456 78901
$5.95
Style: Fall
Color: Rose
Specialty
Brand
23456 78901
$5.95
Style: Fall
Color: Rose
Specialty
Brand
23456 78901
$5.95
Style: Fall
Color: Rose
Specialty
Brand
23456 78901
$5.95
Style: Fall
Color: Rose
Specialty
Brand
23456 78901
$5.95
Style: Fall
Color: Rose
Lines of
print from
a dragging
dot
23456 78901
Fuzzy edges