To learn how to find out what version of firmware you have, please follow the instructions below:
Make sure that the printer is turned on and that no paper is loaded.
Press and hold the Feed button for two or more seconds until the DATA indicator turns red.
Insert a piece of genuine Brother thermal paper into the printer's paper input slot. The report will print automatically, and then the printer will return to an idle state.
When the list of printer settings is printed, check the following item under "Current Settings".
"PROGRAM VERSION : PJ-Main VX.XX"
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