Paper Size Detector Mechanism - Brother LX-300 Service Manual

2.1.4

Paper Size Detector Mechanism

S
Paper Length Detection
1. When the leading edge of the document passes between the Paper feed rollers,
the Actuator top operates about the pivot to turn on the Paper sensor and detect
the document leading edge.
2. When the trailing edge of the document passes out of the Paper feed rollers, the
Actuator top reverts to its original position to turn off the Paper sensor and
detect the document trailing edge.
Document feed surface
Paper sensor
Paper feed sub-roller
Paper feed roller
Actuator top
Fig. 2.1-7 Paper Length Detection
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