Action Yes No
Step 31
Contact your next level of support. You will need the following information:
• Exact 900.xx error digits and complete error message
• Printed menu settings page
• Printed network settings page
• Device error log
• A sample print file if the error appears to be isolated to a single file
• File/Application used if the error is related to specific print file
• Device operating system
• Driver used (PCL/PS)
• Frequency of the occurrence of the error
NVRAM mismatch failure service check
Warning—Potential Damage: When replacing any of the following components:
• Control panel assembly
• Controller board assembly
Replace only one component at a time. Replace the required component and perform a POR before replacing a second
component listed above. If this procedure is not followed, the printer will be rendered inoperable. Never replace two
or more of the components listed above without a POR after installing each one or the printer will be rendered
inoperable.
Warning—Potential Damage: These components can be used as a method of troubleshooting as long as the
machine is booted into diagnostic mode or is operating in diagnostic mode. Once a component has been installed in
a machine and powered up into user mode, it cannot be used in another machine. It must be returned to the
manufacturer.
Action Yes No
Step 1
Check the control panel assembly.
Was the control panel assembly recently replaced?
Go to step 3. Go to step 2.
Step 2
Check the controller board assembly.
Was the controller board assembly recently replaced?
Go to step 4. Contact next level of
support.
Step 3
Replace the current control panel assembly with the control panel
assembly. Go to “Control panel assembly removal” on page 175.
Does the error remain?
Go to step 5. The problem is solved.
4514-420, -430
Diagnostic information
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