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(3) M23 will show the following message on LCD when firmware update.
(4) Printer will reset automatically when firmware is upgrade completely.
Method 2： Use the utility “CommTool.exe” to update printer firmware
(1) Start “CommTool” utility and click “RS232 setup” button to setup PC RS-232
communication parameters.
Main Update BIOS
Receive Data …
Main Update BIOS
Write Flash …