Duplex Controller Card Assembly Communication Failure - Lexmark W840 Service Manual

Step
10 Check the duplex drive motor for proper operation.
1. Enter Diagnostics mode.
2. Select MOTOR TESTS.
3. Select Duplex drv mtr.
Open the duplex left cover assembly.
Does the above motor rotate properly?
11 Check the duplex drive motor assembly for proper
connection.
Is the above motor connected properly?
12 Check the duplex controller card assembly and printer
engine card assembly for proper connection.
Are the connections on the duplex controller card
assembly and the connector P417 on the printer engine
card assembly connected?
13 Perform a 2 sided print test.
Does the error still occur?
14 Perform a 2 sided print test.
Does the error still occur?

980.04 Duplex controller card assembly communication failure

Step
1 Check the duplex unit for proper installation.
Remove duplex unit assembly, and reinstall it.
Perform a two sided print test.
Does the error still occur?
2 Check the duplex controller card assembly and printer
engine card assembly for proper connection.
Are the connections on the duplex controller card
assembly and the connector P417 on the printer engine
card assembly connected?
Check
Check
Yes
Go to step 12. Go to step 11.
Replace the duplex Replace the
drive motor. connection.
Go to "Duplex drive
motor assembly
removal" on
page 4-178.
Go to step 13. Replace the
connection.
Replace the duplex Problem solved.
controller card
assembly.
Go to "Duplex
controller card
assembly removal"
on page 4-181.
Go to step 14.
Replace the printer Problem solved.
engine card
assembly.
Refer to the Printer
Service Manual.
Yes
Go to step 2. Problem solved.
Go to step 3. Replace the
connection.
Diagnostic information
4024-XXX
No
No
2-89