Lexmark C935 Series, Service Manual

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Diagnostic aids
3-9
5057-XXX
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Make sure either letter or A4 size paper is loaded in the default paper source. If the default source only supports
envelopes, then the Quick Test will be printed from Tray 1.
To run the Quick Test:
1. Select DUPLEX TESTS from the Diagnostics Menu.
2. Select Quick Test .
3. Select Single or Continuous .
Quick Test Printing...
appears on the LCD.
•
The single Duplex Quick test cannot be canceled.
•
The printer attempts to print the Quick Test Page from the default paper source. If the default paper
source only supports envelopes, then the page is printed from Tray 1.
•
Check the Quick Test Page for the correct registration between the placement of the first scan line on
the front and back side of a duplexed sheet.
The single test stops automatically when a single duplex sheet is printed, and the continuous test continues until
you press
Stop .
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 DUPLEX TESTS from the Diagnostics Menu.
2. Select Sensor Test.
3. Select Duplex wait and
Duplex wait Testing...
appears on the LCD.
4. Select Door B duplex left and
Door B duplex left Testing...
appears on the LCD.
You can manipulate the appropriate area of the printer to make the sensor toggle between “Open” and “Closed”.
If the wrong message is displayed, then the sensor must be malfunctioning.
Press Stop to cancel the test.
INPUT TRAY TESTS
Feed Tests
Use this test to observe the paper path of media as it passes through the printer. No information is printed on the
feed test pages since the laser is not engaged during this test.
You can perform the feed test using media from any installed input source. All pages used during the feed test
are dropped into the default output bin.
To run the Input Tray Tests:
1. Select INPUT TRAY TESTS from the Diagnostics Menu.
2. Select the input source.
3. Select either Single or Continuous .
•
Single —Feeds one sheet of media from the selected source.
Input source Appears on the LCD
Tray 1
Tray 1 Feeding...
Tray 2
Tray 2 Feeding...
Tray 3
Tray 3 Feeding...
Tray 4
Tray 4 Feeding...
MP Feeder
MP Feeder Feeding...