Chapter 22-55Cassette pick-up sensorThis is a photo-interrupter-type sensor. When paper supplied from the cassette, the sensor light is blocked by the sensor arm, thus detecting paper.Cassette cam sensorThis is a photo-interrupter-type sensor. When the cassette camp rotates to block the sensor light, lowering of the pressure plate of the cassette is detected.Cassette encoder sensorThe cassette encoder sensor detects the slits on the encoder film during cassette motor rotation, thus detecting the amount of rotation of the roller.Paper detection sensorThis is a photo-interrupter-type sensor. When paper is supplied from the cassette, paper tray, or auto roll feed unit, the sensor light is blocked by the sensor arm,thus detecting paper.Spur cam sensorThis is a photo-interrupter-type sensor.When the sensor light is shielded by the rotation of the spur motor, the printer detects that the spur unit is at the upper-limit position.When the sensor light is unshielded by the rotation of the spur motor, the printer detects that the spur unit is at the bottom position.The spur height is controlled by driving the spur motor with a predetermined number of pulses.Cutter lift sensorThis is a photo-interrupter-type sensor. When the cutter unit ascends, the sensor unit blocks the sensor light, thus detecting that the cutter unit is at the upper-limitposition (escaped).Cutter HP sensorThis is a photo-interrupter-type sensor. This sensor detects that the cutter is at the home position (left end).Cutter right position sensorThis is a photo-interrupter-type sensor. This sensor detects that the cutter is at the right end.F-2-60Cassette detection sensorThis is a photo-interrupter-type sensor. When the cassette is installed, the protrusion at the back of the cassette blocks the sensor light to detect the cassette.Cassette paper detection sensorThis is a photo-interrupter-type sensor. When media is loaded in the cassette, the sensor arm blocks the sensor light, thus detecting the media.Feed roller HP sensorFeed roller encoder sensorFeed roller HP sensorCassette paper detection sensorCassette detection sensor