Brother International DCP 8080DN Service Manual - Page 69
Sensors position, MP PE sensor ASSY
UPC - 012502622697
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3.6 Sensors position Sensor name Type Located on Function Detect the paper top Regist front sensor Photo sensor High-voltage PS PCB position or absence of paper. Regist rear sensor Photo sensor High-voltage PS PCB Control the first print position on the paper. Paper eject sensor Photo sensor Relay rear PCB Detect whether the paper is ejected. New toner sensor Photo sensor Relay front PCB Detect whether a new toner cartridge is installed. Detect a new toner cartridge type. Toner LED PCB (Light emission) Toner sensor PCB (Light reception) Photo sensor Frame R Photo sensor Frame L Detect whether the toner cartridge which contains enough toner. Front cover sensor Mechanical switch Frame L Detect the opening and closing of the front cover. PE sensor Photo sensor PE EG sensor ASSY Detect the absence of the paper in each paper tray. Edge sensor Photo sensor PE EG sensor ASSY Detect the absence of each paper tray. Detect whether the paper is sent from the tray. MP PE sensor Photo sensor MP PE sensor ASSY Detect the absence of the paper in the MP tray. DX tray sensor Mechanical switch Relay rear PCB Detect the opening and closing of the back cover. Detect the absence of the DX unit. Document front sensor 1 Photo sensor ADF Detect the absence of the paper in the ADF unit. Document front sensor 2 Photo sensor ADF Detect whether the paper is drawn. Document rear sensor Photo sensor ADF Detect the length of the paper. Switch back sensor Photo sensor ADF When the duplex printing, detect the timing of reversing of the paper. Document cover sensor Photo sensor ADF Detect the opening and closing of the document cover. HP sensor Photo sensor Scanner unit ASSY Detect the home position of the CCD unit. 2-31 Confidential