Lexmark T620 Service Manual - Page 192

4069-5XX/7XX To test the Bin Empty Sensor, actuate its flag in the paper output tray. To test the Bin Full Sensor and Near Full Sensor, first actuate the Bin Empty Sensor and then cover the Bin Full or Bin Near Full Sensor Note: OP=Open CL=Closed Base Sensor Test This test is used to determine if the sensors located inside the printer are working correctly. The following sensors can be checked: Toner Optical Sensor Input Sensor Output Sensor (Fuser Exit) Narrow Media Sensor Front Door Sensor (Upper Front Cover) To run the Base Sensor Test: 1. Select the Base Sensor Test. - The operator panel displays OP for open and CL for closed. 2. Manually toggle the sensors by hand to verify that each sensor switches from open to closed. StapleSmart Finisher Tests Finisher Feed Test This test is used to verify whether or not media can be fed to a finisher output bin and stapled. No information is printed on the test pages as the printhead is not turned on. Eight sheets of paper feed and then the pages staple. Note: This test can be run using any of the paper sizes supported by the printer. The media is fed from the selected source and then outputted to the finisher output bin. 3-26 Service Manual