Lexmark X850e Service Manual page 167

Step Check
5 Check the sensor (upper media exit) for proper
operation.
Perform the sensor (upper media exit) test.
1. Enter the Diagnostics Menu.
2. Touch FINISHER TESTS.
3. Touch Sensor Test.
4. Touch Media Path 1.
5. Touch Upper media exit.
Open the finisher front door.
Move the lower media guide to the right.
Move the upper media guide to the right.
Push a sheet of media into the paper path towards the
sensor (upper media exit).
Does the operator panel display change every time the
actuator of the sensor (upper media exit) is operated?
6 Check the sensor (upper media exit) and the main
sensor cable assembly connections.
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 properly connected?
9 Perform a print test.
Does the error still occur?
Yes
Go to step 7.
Replace the
sensor (upper
media exit).
Go to
(upper media
exit) 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
Replace the
finisher controller
card assembly.
Go to
controller card
assembly
removal" on
page
7500-XXX
No
Go to step 6.
Replace the
connection.
"Sensor
4-181.
Go to step 8.
Replace the
connection.
"Drive
4-192.
Problem solved.
"Finisher
4-195.
Diagnostic information
2-99