Brother HL-1260 service manual Main motor Pick-up solenoid Registration Sensor

4.4 Paper Jam Detection

The printer has a registration sensor and a paper eject sensor at the paper outlet to detect whether the printed paper has been fed correctly. A paper jam is detected by whether the paper is present at the sensor at the check periods programmed in the engine CPU memory. If the engine CPU detects a paper jam, the main motor, paper feed motor and scanner motor is turned off immediately and the jam status is transmitted to the video controller circuit.

A paper jam is detected in any of following conditions:

1)Paper exists at the paper ejection sensor or the registration sensor when power is switched on. (JAM REAR or JAM INSIDE)

2)Paper has not reached the registration sensor within a specified time (JAM TRAYS).

3)Printed paper has not passed through the registration sensor within a specified time (JAM INSIDE (1) ).

4)Printed paper has not reached the paper ejection sensor within a specified time (JAM INSIDE (2) ).

5)Printed paper has not passed through the paper ejection sensor within a specified time (JAM REAR).

Jam tray

STBY PRINT

Main motor

Pick-up solenoid

Registration
sensor
5 sec	Normal	5 sec	Jam
Jam check

	Figure 2.4
Note:	The times in the table above show the HL-1260e. All of them become 1/1.3333 in case
	of the HL-1660.

II - 4