Lexmark X850e Service Manual page 139

Step Check
2 Are the media entrance roll assembly and the media
entrance pinch guide pinch rolls free of damage, and
do they rotate smoothly?
3 Check the media path.
1. Open the finisher front door assembly.
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 properly, and is it
free of damage and contamination?
4 Are the four buffer pinch guide pinch rolls attached on
the lower pinch guide assembly installed properly?
5 Check the sensor (diverter gate) for proper operation.
Perform the sensor (diverter gate) test.
1. Enter the Diagnostics Menu.
2. Touch FINISHER TESTS.
3. Touch Sensor Test.
4. Touch Media Path 2.
5. Touch Diverter gate.
Open the finisher front door.
Move the lower media guide assembly to the right.
Insert a sheet of white media beneath the media
diverter gate. Then push the media to the sensor
(diverter gate).
Does the operator panel display change every time a
piece of white media is placed over the sensing area of
the sensor (diverter gate)?
6 Check the sensor (diverter gate) connection.
Is the above sensor connected properly?
Yes No
Go to step 3. Clean or replace
the appropriate
rolls and clean
the paper path.
Go to step 4. Clean or replace
the appropriate
rolls, and clean
the media path.
Go to step 5. Clean or replace
the appropriate
rolls and clean
the media path.
Go to step 7. Go to step 6.
Replace the Replace the
sensor (diverter connection.
gate).
"Sensor
Go to
(diverter gate)
removal" on
page 4-187.
Diagnostic information
7500-XXX
2-71