2-154 Service Manual
7462
NVRAM mismatch failure (950.00 through 950.29) service check
Warning: When replacing any of the following components:
• Scanner interface card assembly
• System card assembly
Only replace 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: 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.
Step Check Yes No
1 Check the operator panel assembly.
Was the operator panel assembly recently replaced?
Go to step 3. Go to step 2.
2
Check the system card assembly.
Was the system card assembly recently replaced?
Go to step 4. Contact next level
of support.
3
Replace the current operator panel assembly with the
original operator panel assembly.
Does the error remain?
Go to step 5. Problem resolved.
4
Replace the current system card assembly with the original
system card assembly.
Go to “System card assembly removal” on page 4-47.
Go to step 6. Problem resolved.
5
If problem continues, replace the original operator panel
assembly with a new and not previously installed operator
panel assembly.
Does the error continue?
Contact the next
level of support.
Problem resolved.
6
If the problem continues, replace the original panel
assembly with a new ann not previously installed operator
panel door assembly or the operator panel assembly.
Go to “USB cable removal (model X658)” on page 4-111.
Go to “Operator panel assembly removal (model X658)”
on page 4-106.
Contact the next
level of support.
Problem resolved.
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