Paper Size Detector Mechanism - Brother LX-200 Service Manual

2.1.4

Paper Size Detector Mechanism

Paper Length Detection
1. When the leading edge of the document passes between the paper feed rollers,
it rotates the paper sensor crank about the pivot to turn on the paper sensor
which detects the document leading edge.
2. When the trailing edge of the document passes out of the paper feed rollers, the
paper sensor crank reverts to its original position to turn off the paper sensor to
detect the document trailing edge.
Document feed surface
ON
OFF
Paper sensor crank
Paper sensor
Fig. 2.1-6 Paper Length Detection
2-6
Paper feed sub-roller
Paper feed roller
Pivot