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Chapter 1 Product Overview
Recoverable Errors
The printer cannot print when a recoverable error occurs. When the roll paper cover is closed, the power is
turned off and on again, or an error recovery command is received, the printer can recover from the error.
Unrecoverable Errors
The printer cannot print when an unrecoverable error occurs. If the error persists after turning the printer off
and then on again, the printer may be defective. Contact qualified service personnel.
Error Error description Error LED status Condition for Recovery
Autocutter error Autocutter does not work
correctly
ON Recovers from the error when
the jammed paper or foreign
matter is removed, and the roll
paper cover is closed
The error recovery command is valid only if a recoverable error (excluding automatically
recoverable errors) occurs.
Use the TM-T20III Utility to change the condition for recovery. For details, see the TM-T20III Utility
User's Manual.
CAUTION
Turn off the power immediately when an unrecoverable error occurs.
Error Error description Error LED flash code
R/W error in memory After R/W checking, the printer does not
work correctly.
High voltage error The power supply voltage is extremely
high.
Low voltage error The power supply voltage is extremely low.
CPU execution error The CPU is executing an incorrect address.
Internal circuit connection
error
Internal circuits are not connected
correctly.
LED OFF
LED ON
Approx. 320 ms