Diagnostic information 2-137
7526
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 “Accessing test and diagnostic procedure
menus” on page 3-1), and verify that the problem is fixed before performing a POR.
This error code indicates a mismatch between the system board and the scanner MDC card.
Step Questions / actions Yes No
1 Remove all options card from the printer, and
then turn on the printer.
Does this clear the error?
Problem resolved. Go to step 2.
2
Has the top access cover been recently
replaced or swapped from other machines?
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.
Go to step 3
3
Has the UICC been recently replaced or
swapped from 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.
Go to step 4.
4
Has the system board been recently replaced
or swapped from 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.
Go to step 5.
5
Turn the printer power off for ten or more
seconds. Then turn the power back on (POR
the printer).
Is the error gone, and can the printer print?
Problem resolved. Go to step 6.
6
1. Boot the printer to Configuration Mode by
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?
Problem resolved. Go to step 7.
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