Lexmark MS71x/MS81x & MX71x/MX81x Product Study Guide Rev 1.3
For Training Purposes Only 11/19/2012
Control Panel
The Control Panel houses NVRAM in the printer. When it is replaced, special precautions need to be
taken to ensure data is not lost. See the section on Mirrored NVRAM Components in this Guide.
Controller Board
The Controller Board houses NVRAM in the printer. When it is replaced, special precautions need to be
taken to ensure data is not lost. See the section on Mirrored NVRAM Components in this Guide.
In addition, the Controller Board contains the default and custom eSF applications and settings. These
are NOT contained in the NVRAM or on a hard drive. A Controller Board failure could result in loss of
these applications and their settings if they are not backed up. When a new Controller Board is installed,
the Lexmark default eSF applications and settings are loaded.
The best practice is for an administrator to have their eSF applications and settings backed up prior to
encountering a problem. In case this hasn’t been done, an attempt to back up the data should be
performed before replacing the Controller Board.
To back up the eSF applications and settings, do the following:
1. Turn off the printer.
2. Press and hold 3, 4 and 6 to boot into Invalid Engine Code mode..
3. Turn on the printer.
4. Release the buttons when the splash screen appears.
5. Access the printer's Web Page from a web browser.
6. Click on Settings:
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