Paxar Monarch 9850 - Manual (Page 213)

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.
749 RFID verify fail. The RFID verification process failed
after writing (programming) the tag. This is considered
a bad RFID tag. The printer does not recalibrate (feed
a blank label) after any RFID error. For more
information, refer to your RFID Multi-Protocol
Application Notes.
750Printhead is overheated. Turn off the printer to let the
printhead cool. If the error persists, call Technical
Support.
751 Printer did not sense a black mark when expected.
For errors 751-753, Check the
✦ supply tracking
✦ supply marks
✦ black mark sensor position
✦ supply roll for binding.
Press ENTER or ESCAPE/CLEAR, depending on your
printer and try to continue printing. If the error
continues to appear, change the supply.
752 Printer sensed a mark in the wrong place.
753 Printer sensed a mark that is too long.
754 Printer has a ribbon problem. Check the ribbon for a
jam or remove any slack by turning the take-up reel
clockwise. Load a new ribbon.
755 Printhead is open. Close the printhead before
continuing. If the error persists, call Technical Support.
756 The printer is out of supplies. Load supplies.
Diagnostics and Errors 8-23