Brother LX-300 Service Manual page 18

S
Paper Width Detection (Y-CA sensor)
1. As the Y-cutter arm (Y-CA sensor carriage) moves in the direction of the arrow,
the document contacts the Actuator Y, which rotates about the pivot to switch off
the Y-CA sensor (photosensor).
2. When the Y-CA sensor turns off, the Y-cutter arm movement stops and this
position is detected as the document width.
Y-cutter arm
Actuator Y
∗ Photosensor ON status
∗ Photosensor OFF status
Y sensor carriage
Pivot Y-CA sensor
Fig. 2.1-8 Paper Width Detection
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