Avery Dennison Monarch 9855 RFID Operator's Handbook Manual page 104

741 RFID tag missing. The RFID microchip (tag) not found in RF Field
(area inside the printer where RFID tag is programmed). Check
supply loading. If you made supply or print position settings, make
sure the RFID tag was not moved out of the programmable range.
742 Tag erase failed. The RFID microchip (tag) was found in the RF
Field, but could not be erased. Refer to the RFIDMP (Multi-Protocol)
Application Notes or the HF (High Frequency) Application Notes for
more information.
743 Program tag failed. The RFID microchip (tag) was found in the RF
Field, but could not be programmed. Refer to the RFIDMP (Multi-
Protocol) Application Notes or the HF (High Frequency) Application
Notes for more information.
744 Tag locked fail. The RFID microchip (tag) is unable to be
programmed, because it is already locked. This is considered a bad
RFID tag. Refer to the RFIDMP (Multi-Protocol) Application Notes or
the HF (High Frequency) Application Notes for more information.
746 Lock tag fail. The RFID microchip (tag) has not been locked to
prevent reprogramming. This is considered a bad RFID tag. Refer to
the RFIDMP (Multi-Protocol) Application Notes or the HF (High
Frequency) Application Notes for more information.
747 Time out failure. Any RFID command (read, program, etc.) has failed
to complete in the maximum amount of allowed time.
748 Invalid data length/data mismatch from RFID interrogator module.
The RFID interrogator module found a problem with the data received
from the printer.
749 RFID Verify Fail. The RFID verification process failed after writing
(programming) the tag. This is considered a bad RFID tag. Refer to
the RFIDMP (Multi-Protocol) Application Notes or the HF (High
Frequency) Application Notes for more information.
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.
10-10 Operator's Handbook