Sensor (Registration) On Jam (Duplex Paper Feed) - Lexmark W840 Service Manual

Step
5 Check the roll.
Open the duplex left door assembly.
Is the duplex media transport center roll assembly free
of excess wear and contamination?
6 Check the drive power transmission.
Open the duplex left door assembly.
Do the duplex media transport center roll assembly and
the other gears rotate smoothly?
7 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?
8 Check the duplex drive motor for proper connection.
Is the above motor connected properly?
9 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?
10 Perform a 2 sided print test.
Does the error still occur?
14 Perform a 2 sided print test.
Does the error still occur?

231.01 Sensor (registration) on jam (duplex paper feed)

Step
1 Check the paper position.
Open the printer left door assembly, and visually check
it.
Does the paper touch the sensor (registration)?
Check
Check
Yes
Go to step 6. Clean or replace the
duplex media
transport center roll
assembly.
Go to
media center
transport roll
removal" on
page
Go to step 7. Replace damaged
components.
Go to
media center
transport roll
removal" on
page
Go to step 9. Go to step 8.
Go to step 9. Replace the
connection.
Go to step 10. 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
Remove the paper. Go to step 2.
Diagnostic information
4024-XXX
No
"Duplex
4-191.
"Duplex
4-191.
No
2-87