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Chapter 2 Operation of Diagnostic
Epson AcuLaser C2900N
Revision B
Confidential
- About Sensor
A transmission type sensor is composed of the light-emitting side and the light-receiving side that are
placed opposite to each other, allowing the light to pass from the former to the latter. On the basis of
whether or not the light path is blocked by the actuator, etc., the sensor detects the paper absence/
presence or the moving part position such as at the home position or elsewhere.
- About Switch
A micro-switch closes the internal contacts via the button which is pushed down under the provided leaf
spring which is held down by the actuator of the cover or door that is being closed.
When the door or cover is opened, the leaf spring returns to its original position, and the button is
pushed up by the spring in the switch, allowing the internal contacts to open.
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