Lexmark C77X, Service Manual

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Service Manual
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INPUT TRAY TESTS
Feed Test
This test lets you observe the paper path as media is feeding through the printer. The upper front door, used to
access the print cartridge, cannot be opened during the feed test. To observe the paper path, you must open the
lower front door, used to access the paper jams on the vacuum transport belt. Blank pages feed during the test.
Note: This test can run using any of the paper or envelope sizes supported by the printer. The pages are placed
in the default output bin, however, the Feed Test menu lets you select the input source.
To run the Input Tray Feed Test:
1.
Select Feed Test from INPUT TRAY TESTS in the Diagnostics mode.
2.
Select the input source from the sources displayed on the Feed Test menu. All installed sources are
displayed.
3.
Select either Single (feeds one sheet of media from the selected source) or Continuous (continues to
feed from the selected source until Back ( ) or Stop ( ) is pressed).
4.
Press Back ( ) or Stop ( ) to exit test.
Sensor Test
This test can be used for either 500-sheet trays or 2000-sheet trays, as well as the standard trays.
500-sheet trays
Use this test to determine if the input tray sensors for a 500-sheet tray are working correctly.
To run the Sensor Test for 500-sheet trays:
1.
Select the Sensor Test from INPUT TRAY TESTS in the Diagnostics mode.
2.
Select the input source from the sources displayed. All installed sources are displayed.
For example, Tray 1 may appear as follows:
Not all sensors display for all trays. Tray sensors are supported by the following sources:
Source Empty sensor Low sensor Pass thru sensor
Tray 1 Yes Yes Not present
Tray 2* Yes Yes Yes
Tray 3* Yes Yes Yes
Tray 4* Yes Yes Yes
Multipurpose Feeder Yes Not present Not present
* 2000-sheet trays may be in this position. See “For 2000-sheet trays” below.
Empty Closed
Low Closed
Tray 1