Dell Multifunction Laser Printer 5535dn, Service Manual

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2-150
Service Manual
NVRAM mismatch failure (950.00 through 950.29) service check
1 Check the sensor (ADF 2nd scan) for proper installation.
Is the above component properly installed?
Go to step 2. Reinstall the
sensor (ADF 2nd
scan)
2 Check the sensor (ADF 2nd scan) for proper operation.
1. Enter the diagnostic mode
2. Select Scanner tests
3. Select Sensor tests
4. Observe the line item “ADF 2nd scan”
Does the display on the operator panel change every time
the sensing area of the above sensor is interrupted or
blocked?
The sensor is
working properly. Go to step 3.
3 Check the above sensor for proper connection.
Is the above sensor connected properly?
Replace the
sensor (ADF 2nd
scan). Replace the
connection.
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 solved.
4 Replace the current system card assembly with the original
system card assembly. Go to step 6. Problem solved.
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 solved.
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. Contact the next
level of support. Problem solved.
Go to “Sensor
removal” on
(ADF 2nd scan)
page 4-81 .
Go to “System card assembly removal” on page 4-50 .
Go to “USB cable removal (model X658)” on page 4-114 .
Go to “Operator panel assembly removal (model X658)”
on page 4-109 .