Lexmark W850 - Sensor (Buffer Path) on Jam a

Diagnostic information 2-23
4024-XXX
283.00 Sensor (buffer path) on jam A
3 Check the drive motor (entrance/paddle) for correct
operation.
Check the above motor by opening the finisher front
door assembly and then closing it.
Does the motor (entrance/paddle) rotate normally?
Go to step 5. Go to step 4.
4 Check the drive motor (entrance/paddle) connection.
Are the connections of the main drive cable assembly
correctly connected?
Replace the drive
motor (entrance/
paddle). Go to
“Drive motor
(entrance/
paddle) and belt
(entrance/
paddle)
removal” on
page 4-100.
Replace the
connection.
5 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 the media entrance roll assembly and the
media entrance pinch guide pinch roll attached on
the media entrance pinch guide assembly by
turning them with your fingers.
Is the media entrance roll assembly and the media
entrance pinch guide pinch rolls operating correctly?
Go to step 2. Clean or replace
the appropriate
rolls and clean
the media path.
2 Are the media entrance roll assembly and the media
entrance pinch guide pinch rolls free of damage, and
rotate smoothly?
Go to step 3. Clean or replace
the appropriate
rolls and clean
the paper path.
3 Check the media path.
1. Open the finisher front door assembly of the
finisher.
2. Open the lower pinch guide assembly to the right.
3. Check the buffer roll assembly by turning it with
your fingers.
Is the buffer roll assembly installed correctly, and is it
free of damage and contamination?
Go to step 4. Clean or replace
the appropriate
rolls, and clean
the media path.
Step Check Yes No