950.29-Eprom Mismatch Failure - Lexmark X746de Service Manual

950.00–950.29—EPROM mismatch failure
Warning: When replacing any one of the following components:
• Scanner MDC card or flatbed scanner
System board
•
Replace only one component at a time or the MFP will be rendered inoperable. Replace the required
component, and bring the MFP up in Diagnostic Menu (see
menus" on page
This error code indicates a mismatch between the system board and the scanner MDC card.
Step Questions / actions
Remove all options card from the printer, and
1
then turn on the printer.
Does this clear the error?
Has the top access cover been recently
2
replaced or swapped from other machines?
Has the UICC been recently replaced or
3
swapped from other machines?
Has the system board been recently replaced
4
or swapped from other machines?
Turn the printer power off for ten or more
5
seconds. Then turn the power back on (POR
the printer).
Is the error gone, and can the printer print?
1. Boot the printer to Configuration Mode by
6
pressing 2 and 6 button during POR.
2. Navigate to Factory Defaults > Restore
Base.
Note: You will lose printer customer
settings.
3. Exit Configuration Mode, and then POR
the printer.
Does this fix the problem?
3-1), and verify that the problem is fixed before performing a POR.
"Accessing test and diagnostic procedure
Yes
Problem resolved.
Install a new Top access
cover and perform a POR.
Warning: Only install a top
access cover that was not
previously installed on
other machines.
Install a new UICC card
and perform a POR.
Warning: Only install a
UICC card that was not
previously installed on
other machines.
Install a new System board
and perform a POR.
Warning: Only install a
system board that was not
previously installed on
other machines.
Problem resolved.
Problem resolved.
7526
No
Go to step 2.
Go to step 3
Go to step 4.
Go to step 5.
Go to step 6.
Go to step 7.
Diagnostic information
2-137
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