Zebra 49834 Manuale Utente
150
170PAX4 Maintenance Manual
57518L-001 Rev. A
3/18/05
Preventive and Corrective Maintenance
Corrective Maintenance—Print Quality Adjustments
Strip Plate Optimal Adjustment
The strip plate position is a very important part of the total printhead adjustment procedure.
The strip plate is adjusted for proper tracking and separation of the ribbon from the media after
printing.
The strip plate is adjusted for proper tracking and separation of the ribbon from the media after
printing.
. This adjustment procedure should be done only after good print quality has
been achieved.
1.
Perform the PAUSE Key Self Test by pressing PAUSE while turning On (l) the print
engine.
engine.
2.
Press PAUSE and, after the print engine pauses, observe the ribbon for possible problems
such as wrinkling, uneven pressure, etc.
such as wrinkling, uneven pressure, etc.
3.
Loosen the two screws holding the strip plate to the front of the printhead assembly.
4.
While printing labels, lower the strip plate until the ribbon is flat and smooth and winds
properly on the ribbon take-up spindle.
properly on the ribbon take-up spindle.
5.
Tighten the strip plate mounting screws and print a minimum of 25 labels while checking
for ribbon wrinkle, tracking and media/ribbon separation problems.
for ribbon wrinkle, tracking and media/ribbon separation problems.
Print Darkness Adjustment
Due to differences in types of media/ribbon and wear on thermal printhead elements, it may be
necessary to adjust the
necessary to adjust the
DARKNESS
configuration parameter to achieve proper printing.
Turning the print engine off is not required for the new setting to take effect.
To adjust the darkness, follow the steps below:
1.
Begin printing a batch of labels. Use the PAUSE Key and CANCEL Key Self Test label or,
preferably, one of your own formats.
preferably, one of your own formats.
2.
. Using the front panel display and the membrane
keys, adjust the darkness setting to obtain the preferred print quality. Decreasing the value
in the display causes a lighter image. Increasing the value causes a darker image.
in the display causes a lighter image. Increasing the value causes a darker image.
Caution • Set the darkness to the lowest setting possible for optimum print quality.
Darkness set too high for a given ribbon may cause ink smearing, ribbon wrinkle, and/or
burning through the ribbon, as well as premature printhead failure.
Darkness set too high for a given ribbon may cause ink smearing, ribbon wrinkle, and/or
burning through the ribbon, as well as premature printhead failure.