Lexmark Optra E 4026-0 Series Reference Handbook page 105

Duplex Feed 2 Test
This test verifies that paper feeds through the duplex unit properly and
tests the stop point of the page as it feeds back over the top of the
duplex paper tray.
1. Enter Diagnostics mode.
2. Select [Duplex Tests].
3. Select [Duplex Feed 2].
4. Select [Tray 1] or [Tray 2].
Note: Paper will feed all the way into the duplex unit and then
feed out and stop on top of the paper tray.
5. The message [CLEAR PAPER] will appear on the display.
6. Open the printer top cover.
7. If you are doing the test with legal size paper, open the top cover
of the duplex unit.
8. Carefully remove the duplex unit from the printer without
disturbing the position of the paper on the top of the duplex tray.
Do not disconnect the duplex cable from the printer.
9. Without changing the position of the page, hold it to the top of the
paper tray and remove the paper tray.
10. Measure from the leading edge of the page to the leading edge
of the paper stack in the tray. This measurement should be
75mm or less. If it is larger than 75mm, there is a drive problem in
the duplex unit or in the tray top cover.
11. Select [CONTINUE].
12. Perform the test several times to verify that the measurement is
accurate.
13. Press RETURN to return to Diagnostics mode main menu.
Envelope Enhance
Use this procedure to set the Fuser Solenoid power level to low,
medium, or high. Increase the level to reduce envelope wrinkling, or
decrease the level to reduce solenoid noise.
1. Enter Diagnostics mode.
2. Select [Envelope Enhance].
3. Select [Low], [Medium], or [High].
4. Press RETURN to return to Diagnostics mode main menu.
5-12
Laser Printer Reference Handbook