Brother International HL-2400C Service Manual - Page 83

(4) Sensors No. Name 1 Paper Size Sensor Code Function PSU Photo sensor to detect the paper size. 2 Paper Feeding Sensor PT1 Photo sensor to detect when paper is fed from the media cassette. 3 Paper Exit Sensor PT2 Photo sensor to detect that paper is exited from the paper exit unit. 4 Paper Empty Sensor PE Photo sensor to detect if paper is loaded in the media cassette. 5 Oil Sensor OIL Photo sensor to detect if the fusing unit oil is empty. 6 OHP Sensor OHP Photo sensor to detect if media in the media cassette is an OHP. 7 Drum Jam Sensor DPJ Photo sensor to detect if paper is wound around the transfer drum. 8 Drum Encoder Sensor EN Photo sensor to detect rotation of the transfer drum. 9 Belt Sensor PBS Photo sensor to detect the home position of the OPC belt. 10 Toner Empty Sensor TPD/TTR Photo sensor to detect if the toner is empty for each toner cartridge. 11 Waste Toner Sensor WTS Photo sensor to detect if the waste toner bottle is full of toner. 12 Developing Photo Sensor DHP1, Photo sensor to detect the position of DHP2 the toner cartridge. 13 Cleaning Roller Sensor CRS Photo sensor to detect if the fuser cleaner is fitted in the fixing unit. 14 Temperature Sensor for Fusing Unit TH Thermistor to detect the fuser temperature. IV-34