Lexmark 2380 Service Manual - Page 39

Auto Sheet Feeder (ASF) Service Check Note: Be sure the sheet feeder is enabled. Refer to "Setup Mode" on page 1-6. Auto Sheet Feeder Principles of Operation The auto-sheet feeder (ASF) feeds into the cut sheet paper entry throat. To use the ASF: • The paper select lever must be set to cut sheet. • Auto Sheet Feeder must be selected in the Setup menu. Continuous forms can be used with the ASF installed by moving the paper select lever to continuous forms and pressing Start to feed the continuous forms to the first print line. The ASF contains no electrical parts. It is driven from the gear on the inside of the printer's right side frame. The combination lock mechanism is a clutch that causes the ASF pick rollers to feed only one sheet of paper at a time. When Auto Sheet Feeder is selected on the Setup Menu, the cut sheet paper drive reverses itself for a short distance during paper loading. This reversal engages the clutch and thus engages the paper picker rollers, which feed the top sheet from the cut sheet paper stack. The sheet is fed about 5 inches (125 mm) and the paper path briefly reverses again; this disengages the clutch and the picker rollers. The sheet is then fed to the print line by the ASF's upper and lower feed rollers and the printer's lower feed rollers. Although the ASF picker rollers continue to turn as the paper is fed, their drive is disengaged and they are actually being turned by the paper. FRU 1 Paper Select Sensor Action With the paper select lever in the cut sheet position, do the following: • Try to load a sheet with Alt+Park/Load. (This button should not work) • If the paper loads go to the "Paper Select Sensor Service Check" on page 2-30. Diagnostic Information 2-15