HP LaserJet 1100 Service Manual - Page 51

3 Paper sensor (PS001) 4 Pickup roller 5 Paper sensor (PS002) 6 Transfer roller 7 Toner cartridge 8 Pressure roller 9 Fusing unit 10 Paper exit sensor 11 Delivery rollers 12 Face-up/Face-down deflector 13 Face-down output path 14 Face-up output path Paper jam detection The paper out sensor (PS001), paper registration sensor (PS002), and the paper exit sensor (PS201) detect paper moving through the HP LaserJet 1100 Printer. If a paper jam is detected, the ECU immediately stops the printing process and displays a paper jam message on the control panel. A paper jam can be detected under any of the following conditions: • Power-on jams. Paper is present under either (PS201) or (SL001) at power on. • Pickup jams. Paper does not reach and clear photosensor (SL001) within a specified period of time. The time period begins when the Paper Pickup Solenoid (SL001) is energized. • Delay jams. Paper does not reach or clear the photosensor (PS201) within a specified period of time. • Wrapping Jam Photosensor (PS201) detects the trailing edge of the paper within a specified period of time after photosensor (SL001) detects the trailing edge. 54 Functional Overview C4224-90962