Lexmark W850 - Sensor (Upper Media Exit) on Jam B

Diagnostic information 2-47
4024-XXX
287.02 Sensor (upper media exit) on jam B
5 Check the drive motor (buffer/transport) for rotation.
Check the above motor by opening the finisher front
door assembly and then closing it.
Does the drive motor (buffer/transport) rotate properly?
Go to step 7. Go to step 6.
6 Check the drive motor (buffer/transport) connection.
Is the above motor connected properly?
Replace drive
motor (buffer/
transport). Go to
“Drive motor
(buffer/
transport) and
belt (buffer/
transport)
removal” on
page 4-115.
Replace the
connection.
7 Check the drive motor (exit) for correct operation.
Check the above motor by opening the finisher front
door assembly and then closing it.
Does the motor (exit) rotate normally?
Go to step 9. Go to step 8.
8 Check the drive motor (exit) connection.
Is the above motor connected properly?
Replace the drive
motor (exit). Go
to “Drive motor
(exit) assembly
and belt (exit)
removal” on
page 4-113.
Replace the
connection.
9 Perform a test print.
Does the error still occur?
Replace the
finisher controller
card assembly.
Go to “Finisher
controller card
assembly
removal” on
page 4-118.
Problem solved.
Step Check Yes No
1 Check the media path.
1. Open the finisher front door assembly of the
finisher.
2. Remove the top cover and left upper cover.
3. Open the entrance pinch guide assembly upward.
4. Check four media entrance pinch guide pinch rolls
of the entrance pinch guide assembly and media
entrance roll assembly by turning them with your
fingers.
Are the media entrance pinch guide pinch rolls
installed correctly and do they rotate smoothly?
Go to step 2. Clean or replace
the appropriate
roller, and clean
the media path.
2 Are the four media entrance pinch guide pinch rolls of
the entrance pinch guide assembly and media
entrance roll assembly free of damage?
Go to step 3. Clean or replace
the appropriate
roller and clean
the media path.
Step Check Yes No