Lexmark X543 Service Manual page 176

7525-xxx
Select the printer needing the firmware update from the "Select Printer From List" dropdown menu.
16.
Click Start. The printer will start the update process. Various status and progress messages will appear on
17.
the printer's operator panel.
Warning: Warning: Do not turn the machine off until the update is complete. When the firmware update is
completed, the printer will automatically reboot and return to a Ready state.
18. After the printer reboots, confirm that it is on Ready or Invalid Engine Code mode. If it isn't refer to the
note on page 3-46.
Service Manual
3-50
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