Rice Lake Zebra GK420d User Manual
Page 75
63
Print Quality Problems
12/14/07
GK420d User Guide
980608-001 Rev. A
There are long tracks of missing print (blank vertical lines) on
several labels.
• The printhead is dirty. Clean the printhead.
• The printhead elements are damaged.
The printing does not start at the top of the label or misprinting of
one to three labels.
• The media may not be threaded correctly. Follow the instructions for
in the Getting Started section.
• The printer needs to be calibrated. Refer to the two-flash sequence of
in this section.
• ZPL Label Formats - The correct media sensor may not be activated. Manual calibration
selects the media sensing method for the labels being used (refer to the
^MN
command in
the ZPL Programming Guide).
• ZPL Label Formats - Verify that the Label Top (
^LT
) command is correctly set for your
application (consult the ZPL Programming Guide).
• EPL Label Formats - The correct media sensor may not be activated for label dispensing,
blackline or notch sensing, or for Gap/Web sensing. Manual calibration selects the media
sensing method for the labels being used (refer to the
O
and Q commands in the EPL
Programmer’s Guide).
• EPL Label Formats - Verify that the Set Label Length (Q) command is correctly set for
your application (consult the EPL Programmer’s Guide).
A ZPL label format was sent to, but not recognized by, the printer.
• Is the printer in pause mode? If so, press the Feed button.
• If the status LED is on or flashing, refer to
What the Status Light is Telling You on page 60
• Make sure the data cable is correctly installed.
• A communications problem has occurred. First, make sure that the correct
communications port on the computer is selected. Refer to
in the Getting Started section.
• Verify the correct Format and Control Prefix on the printer match what y ou are using in
your ZPL programmed label format. The default Format (COMMAND CHAR) is Caret
(^) character and the Control (CONTROL CHA R) is a Tilde (~) character. Verify the
characters with the Configuration Status label printout. Refer to the one-flash sequence of
to print this label.