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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