Sensor Test (Duplex); Duplex Feed 1 - Lexmark E450DN - E 450dn B/W Laser Printer Service Manual

Sensor Test (duplex)

This test is used to determine whether or not the duplex sensors and switches are working correctly. The test
allows you to actuate the duplex input sensor located in the back part of the duplex unit and the duplex exit
sensor located in the return paper path.
1.
Select Sensor Test from DUPLEX TESTS.
The message Sensor Test Testing displays.
2. Manually actuate each of the duplex sensors. When the sensor/switch is closed, CL (closed) displays, and
when the sensor/switch is open, OP (open) displays.
•
Duplex input sensor
•
Duplex exit sensor
3.
)
Press Back ( or Stop (

Duplex Feed 1

This test feeds a blank sheet of paper to the duplex paper stop position 1. This test can be run using any of the
supported paper sizes.
To run the Duplex Feed 1 Test:
1.
Select Duplex Feed 1 from DUPLEX TESTS.
The power indicator blinks while the paper is feeding, and the message Duplex Feed 1 Feeding...
displays.
The message Duplex Feed 1 Clear Paper displays when the paper reaches paper stop position 1,
and the power indicator turns on solid.
2.
Remove the media from the duplex unit, and clear the message on the operator panel by pressing Stop
)
( .
)
to exit the test.
4512-630
3-17
Diagnostic aids