Brother International DCP 8040 Service Manual - Page 72

CHAPTER 3 THEORY OF OPERATION 2.3.3 Paper eject After the printing image on the photosensitive drum is transferred onto the paper, the paper is fed to the fixing unit to fix unfixed toner onto the paper. Afterwards, the paper is ejected from the fixing unit by the first eject roller in the fixing unit. The paper eject actuator detects whether the paper is ejected correctly or not. After the paper exits from the first eject roller, the paper is turned by the rear cover and ejected face down into the top output tray through the second eject roller. If the rear cover is open, the paper is ejected face up straight to the printer rear (straight paper path). Second eject roller Rear cover Paper eject actuator Fig. 3-23 First eject roller 2.3.4 Duplex printing After the paper exits from the second eject roller with the front of sheet printed, the second eject roller rotates conversely and feeds the paper to the duplex tray, where the paper skew is adjusted. Afterwards, the paper is ejected from the duplex tray to the path through the paper feed roller and the transfer roller to the transfer block in the drum unit again for process of printing on the back of sheet. Second eject roller Paper cover Paper outer guide Heat roller Photosensitive drum Paper guide Paper feed pinch roller First eject roller Pressure roller Duplex tray Transfer roller Rear registration Front registration sensor lever sensor lever Paper feed roller Fig. 3-24 3-16