Duplex Unit Missing Service Check - Lexmark Pro5500t Service Manual

Step
4 Turn off the printer by unplugging the power cord.
Visually check the Pressure Release Arm (PRA) lift for
any damage. Manually turn the gear clockwise until it
lifts the pressure arms, and it goes back to its original
position.
Can the gear turn 360 degrees?
5 Check the pressure arm and pressure arm roll for any
damage.
Is the pressure arm assembly free from any
damage?
6 Check if the PRA assembly will initialize during POST.
Does the PRA assembly initialize during POST?
7 Replace the duplex unit. See
on page
Does the problem remain?
8 Replace the system board. See
removal" on page
Does the problem remain?
9 Replace the print engine assembly. See
assembly removal" on page
Does the problem remain?

Duplex unit missing service check

Step
1 Check the duplex unit for any damage.
Is the duplex unit free from any damage?
2 Check the following conditions on the duplex unit:
• Voltage between the duplex terminals is +3V.
• Metal contacts on the duplex unit is in contact with
the terminals.
• Duplex terminals are not bent or damaged.
Reseat the J31 cable on the system card.
Are the terminals free from any damage and reads
+3V?
3 Replace the duplex unit. See
page 4-11.
Does the problem remain?
4 Replace the system board. See
removal" on page
Does the problem remain?
5
Replace the print engine assembly. See
assembly removal" on page
Does the problem remain?
Check
"Duplex unit removal"
4-11.
"System board
4-32.
4-84.
Check
"Duplex unit removal" on
"System board
4-32.
4-84.
Yes
Go to step 5.
Go to step 6
Go to step 7.
Go to step 8.
Go to step 9.
"Print engine Replace the
printer.
Yes
Go to step 2.
Go to step 4.
Go to step 4.
Go to step 5.
"Print engine Replace the
printer.
Marketing Name
No
Go to step 8.
Go to step 8.
Go to step 8.
Problem resolved
Problem resolved
Problem resolved
No
Go to step 3.
Go to step 5.
Problem resolved
Problem resolved
Problem resolved
2-72
Diagnostic information
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