Lexmark W850n Service Manual page 79

Step
4 Check the tray 2 media feed lift motor for operation.
Pull out the media tray, and then push it back in.
Does the motor lift up the tray normally?
5 Check the tray 2 media feed lift motor connection.
Is the tray 2 media feed lift motor properly connected?
6 Check the tray 2 media feed lift motor for operation.
Replace the tray 2 media feed lift motor with media tray 1.
Pull out the media tray, and then push it back in.
Does the above motor rotate normally?
7 Check the tray 2 sensor (media level) 2 for operation.
1. Enter Diagnostics mode.
2. Select INPUT TRAY TESTS.
3. Select Sensor test.
4. Select Tray 2.
5. Select Media level.
Remove the media tray assembly.
Move the pick roll, with your finger, up and down.
Note: Avoid touching the rubber roll surface.
Does the display on the operator panel change every time
the sensing area is blocked?
8 Check the tray 2 sensor (media level) connection.
Is the tray 2 sensor (media level) properly connected?
9 Perform a print test.
Does the error still occur?
Check Yes
Go to step 9. Go to step 5.
Go to step 6. Replace the
connection.
Reinstall the Go to step 7.
media feed lift
motor for tray 1 as
it previously was.
Go to "Media feed
lift motor
removal" on
page 4-30.
Replace the tray 2
motor with a new
one.
Go to "Media feed
lift motor
removal" on
page 4-30.
Go to step 9. Go to step 8.
Replace the Replace the
sensor (media connection.
level).
Go to "Sensor
(media level)
removal" on
page 4-36.
Replace the Problem solved.
printer engine card
assembly.
Go to "Printer
engine card
assembly
removal" on
page 4-119.
Diagnostic information
4024-110
No
2-59