Solenoid, photosensors, and switches The following figure shows the locations of the solenoid, photosensors, and switches. Table 3-2. Solenoid, photosensors, and switches 1 Pickup solenoid (SL001) Enables the pickup roller. 2 Paper top sensor (SL001) Detects the leading and trailing edges of the paper. Synchronizes the photosensitive drum and the top of the paper. 3 Door open sensor (SW301) Detects whether or not the printer door is closed and the Toner Cartridge is present. Printing cannot continue until the printer door is closed and the Toner Cartridge is in its correct position.
4 Paper out sensor (PS001) If the sensor does not sense paper in the Paper Input Bin or the Single Sheet Input Slot, the Control Panel displays the paper-out message. Paper must be loaded before printing can resume. 5 Document sensor (PS1) Detects the presence and leading edge of a document in the document feed path. 7 Paper exit sensor (PS201) Senses when paper has successfully moved out of the fusing area. 8 Engine test switch (SW201) See “Troubleshooting” in this chapter for information about engine tests. 9 Power Switch (SW101) Turns power to printer on and off (220V units only). C4224-90962 Printer paper feed system 55