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Appendix E
Users Manual Model 686 / 686 HT
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. Check that the AC outlet supplying the printer has a true ground
path. AVERY DENNISON printers remove static through the frame and out the ground leg
on the AC power cord. If this path does not exist, it will build up in the printer.
Specialty
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$5.95
Style: Fall
Color: Rose
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Color: Rose
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Style: Fall
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Style: Fall
Color: Rose
Lines of
print from
a dragging
dot
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Fuzzy edges
Summary of Contents for 686 HT
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Page 67: ...Users Manual Model 686 686 HT Electrical Drawings 65 Electrical Drawings...
Page 85: ...Users Manual Model 686 686 HT Assembly Drawings 83 Assembly Drawings...
Page 86: ...84 Assembly Drawings Users Manual Model 686 686 HT Unwind Assembly Drawing...
Page 88: ...86 Assembly Drawings Users Manual Model 686 686 HT Unwind Turnbar Assembly Drawing...
Page 90: ...88 Assembly Drawings Users Manual Model 686 686 HT Contrast Sensor Assembly Drawing...
Page 106: ...104 Assembly Drawings Users Manual Model 686 686 HT Ink Save PC Board Assembly 4 1 5 7 2 6 3...