Lexmark X850e Service Manual page 152

7500-XXX
Step Check
4 Are the buffer pinch guide pinch rolls free of damage?
5 Check the sensor (buffer path) for proper operation.
Perform the buffer path test.
1. Enter the Diagnostics Menu.
2. Touch FINISHER TESTS.
3. Touch Sensor Test.
4. Touch Media Path 1.
5. Touch Buffer path.
Open the finisher front door.
Lower the buffer pinch guide assembly.
Push a sheet of media into the buffer path and around
the buffer roll assembly in a clockwise direction.
Does the operator panel display change every time the
actuator of the sensor (buffer path) is operated?
6 Check the sensor (buffer path) connection.
Is the above sensor connected properly?
7 Check the drive motor (buffer/transport) for proper
operation.
Perform the drive motor (buffer/transport) test.
Remove the finisher rear upper cover. Go to
upper cover removal" on page
1. Enter the Diagnostics Menu.
2. Touch MOTOR TESTS.
3. Touch Finisher Motor Tests.
4. Touch Motor (buffer/transport).
Does the drive motor (buffer/transport) operate
properly?
8 Check the drive motor (buffer/transport) connection.
Is the above motor connected properly?
2-84
Options Service Manual
Yes
Go to step 5.
Go to step 7.
Replace the
sensor (buffer
path).
Go to
(buffer path)
removal" on
page
Go to step 9.
"Rear
4-101.
Replace the drive
motor (buffer/
transport).
Go to
motor (buffer/
transport) and
belt (buffer/
transport)
removal" on
page
No
Clean or replace
the appropriate
roller, and clean
the media path.
Go to step 6.
Replace the
connection.
"Sensor
4-170.
Go to step 8.
Replace the
connection.
"Drive
4-192.