Brother International HL-720 Service Manual - Page 43

Paper Eject, Fig. 2.29, paper eject sensor actuator, the photo sensor is closed and the completion

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2.2.3 Paper Eject The completion of paper eject is detected in the following manner: (a) When the leading edge of the paper push down the eject sensor actuator located in the fixing unit, the photo sensor (photo interrupter) is opened and detects the start of paper eject motion. (b) After that, when the bottom of the edge of paper has passed through the paper eject sensor actuator, the photo sensor is closed and the completion of paper eject motion is recognized. Transfer roller Pressure roller Eject sensor actuator Eject roller Drum Heat roller Sensor Paper High-voltage power supply PCB , Eject sensor actuator ,Paper Fig. 2.29 Sensor II-26

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II-26
2.2.3
Paper Eject
The completion of paper eject is detected in the following manner:
(a)
When the leading edge of the paper push down the eject sensor actuator
located in the fixing unit, the photo sensor (photo interrupter) is opened and
detects
the start of paper eject motion.
(b)
After that, when the bottom of the edge of paper has passed through the
paper eject sensor actuator, the photo sensor is closed and the completion
of paper eject motion is recognized.
Fig. 2.29
Pressure roller
Eject sensor actuator
Eject roller
Heat roller
Drum
Transfer roller
High-voltage power
supply PCB
Sensor
Eject sensor actuator
Paper
Paper
Sensor