Page: 33Service Guide ML390/391Chapter 2 Principles of Operation2.4.05 Paper-End Detection MechanismRear Paper FeedWhen paper is installed in the printer, it prevents the paper-end lever (Tip A) from falling into the groove ofthe paper chute and platen. This activates the paper-end sensor.When the printer runs out of paper, the paper-end lever falls into the groove of the paper chute. The rearpart of the paper-end lever deactivates the paper-end sensor. An out-of-paper condition is detected.Paper-end is detected when the end of the remaining paper is about 1 inch (25.4 mm) from the printheadposition.Bottom Paper FeedPaper installed in the printer contacts the paper-end lever (Tip B). The paper prevents the bottompaper-end lever from falling into the slot in the bottom paper guide. This causes the rear part of thepaper-end lever to activate the paper-end sensor.When the printer runs out of paper, the tip of the bottom paper-end lever falls into the hole in the bottompaper guide. The rear part of the paper-end lever activates the paper-end sensor. An out-of-papercondition is detected.Paper-end is detected when the end of the remaining paper is about 1 inch (25.4 mm) from the printheadposition.Cut-Sheet Paper FeedPaper installed in the printer prevents the paper-end lever (Tip C) from falling into the groove of the paperchute. The paper-end sensor is activated.When paper is removed, the paper-end lever falls into the groove of the paper chute. The rear part of thepaper-end lever deactivates the paper-end sensor. An out-of-paper condition is detected.Paper-end is detected when the end of the remaining paper is about 1 inch (25.4 mm) from the printheadposition.
