Paxar Monarch 9855 Operator's Handbook Manual page 107

747 Time out. Any RFID command (read, program, etc.)
has failed to complete in the maximum amount of
allowed time. The printer does not recalibrate (feed a
blank label) after any RFID error. For more information,
refer to your RFID Application Notes.
748 Invalid data length/data mismatch from RFID
interrogator module. The RFID interrogator module
found a problem with the data received from the printer.
The printer does not recalibrate (feed a blank label)
after any RFID error. For more information, refer to
your RFID Application Notes.
750 Printhead is overheated. Turn off the printer.
751 Printer did not sense a black mark when expected. For
errors 751-753, check the supply tracking, supply
marks, black mark sensor position, and supply roll for
binding. Press Escape/Clear and try to continue
printing. Change supply.
752 Printer sensed a mark in the wrong place.
753 Printer sensed a mark that is too long.
754 Check for a ribbon jam or remove any slack in the
ribbon by turning the take-up reel clockwise. Load a
new ribbon.
755 Printhead is open. Close the printhead.
756 Load supplies.
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Diagnostics & Troubleshooting 10-11