Brother International HL-3400CN Service Manual - Page 86

HL-3400CN SERVICE MANUAL (4) Sensors No. Name Code Function 1 Paper size sensor 2 Paper feeding sensor PSU PS 1 Photo sensor to detect the paper size. Photo sensor to detect when paper is fed from the media cassette. 3 Paper exit sensor 4 Paper empty sensor PS 2 PS 3 Photo sensor to detect that paper is exited from the paper exit unit. , 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 PS 4 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 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 Home position sensor GHP1/ Photo sensor to detect the position of GHP2 the toner cartridge. 13 Cleaning roller sensor PS 5 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. 15 Paper full sensor 16 Toner key sensor PS 6 TNK The sensor to detect when the paper eject tray is full of paper. , The sensor to detect the key provided in the toner cartridge.