Lexmark Optra N 4040, Reference Handbook

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Laser Printer Reference Handbook
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Disk Test/Clean
This is a two hour test (three hours for 100MB drives) that should be
performed only on a disk that contains bad data and is therefore
unusable.
This test destroys all data on the disk by doing a multi-pass write/read
on every block of the disk. Bad blocks are flagged and removed from
use. If over 2000 bad blocks are found, the test stops and the display
indicates the disk must be replaced.
A message describing test progress is displayed during the test.
1. Enter Diagnostics mode.
2. Select [DEVICE TESTS].
3. Select [Disk Test/Clean].
4. Select [CONTINUE] to start the test, or [CANCEL] to return to
Diagnostics mode main menu.
5. Select [CANCEL] to interrupt the test.
6. Press Return to return to the Diagnostics mode main menu.
Duplex Feed 1 Test
This test checks for slipping paper problems. It verifies that the paper is
entering the duplex unit far enough for the trailing edge to clear the
selector fingers before the paper reverses direction.
1. Enter Diagnostics mode.
2. Select [DUPLEX TESTS].
3. Select [Duplex Feed 1].
4. Select [Tray 1], or [Tray 2].
Note: Paper feeds all the way into the duplex unit and stops.
5. The message [Clear Paper] appears on the display.
6. Slide the tray extension all the way out until it stops.
7. Push a small screwdriver through the lower end of one of the
ventilation slots and through the sheet of paper fed in under the
slot.
8. Open the cover and remove the sheet of paper.
9. Measure the distance from the mark on the paper to the trailing
edge of the paper. If the mark, or hole, is more than 85 mm from
the trailing edge, there is a paper slipping problem with the
duplex unit paper feed.