Brother HL-1260 service manual Paper PICK-UP/FEED System, Pcb

4. PAPER PICK-UP/FEED SYSTEM

4.1 Outline

If a tray1 paper pick-up roller solenoid drive signal (PUCL1) is input to the circuit while the paper feed motor is rotating, the paper pick-up solenoid comes on and the paper pick-up roller solenoid is engaged. As a result, the paper pick-up roller rotates to feed paper down to the photosensitive drum.

The paper position is controlled by the registration sensor so that the leading edge of the paper is aligned with the leading edge of the image on the photosensitive drum. After this operation, the paper is deliveried to the face down tray via the fixing unit. Paper ejection is detected by the paper ejection sensor; if printed paper has not reached or not cleared the paper ejection sensor in a specified time, the printer judges that a paper jam has occurred. In this case a paper jam is noticed to the external devise by a status signal.

	MP tray	paper empty sensor
Tray paper empty sensor			Tray1 Pick-up roller solenoid

Fixing rollers Transfer roller

MP tray paper empty sensor signal (PEMP)

MP tray Pick-up roller solenoid

MP tray pick-up roller solenoid drive signal (MPSOL)

Paper feed motor drive signal

Paper- feed motor

Tray1 pick-up roller solenoid drive signal (PUCL1)

Tray1 paper empty sensor signal (PETRAY1)

			Registration sensor signal (REGIST)			PCB
	Registration sensor				Main motor drive	Main
					signal (MDRIVE)
	Photosensitive drum			Main motor
sensorejectionPaper
		Paper ejection sensor signal (EJECT)

Figure 2.18

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