Citizen CLP-6401 User Manual page 26

During execution of the printer self-test, the printer will eject an alignment label,
then print a status report and finally, print a series of head test patterns. Use the
head test patterns to identify any problems with missing dot rows, uneven head
pressure, heat setting and transfer smearing .
The status page will look similar to the following:
The Status Label gives the user information regarding the current system setting of
the printer. It references the Version #, shows the date and time setting, validates
the on board ROM, indicates current serial communication values, Mode of printing
(Direct Thermal or Thermal Transfer), the type of media (Gap, Black Line) with
sensor voltage values, checks the head and even tells you the number of mm's of
material that have passed under the head mechanism. All of this information can
be useful when trying to troubleshoot your printer.
When the printer enters Monitor mode, any information communicated to the printer
will be printed on the label material. After each carriage return a label will be
printed displaying in Hex and ASCII the contents of the data stream received at the
printer. You can use this to test both the actual fact of communication with the
printer, and the exact contents of the data stream being sent.
To return the printer to normal operating cycle the power.
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