Brother FAX-2840 Service Manual page 236

(3) Change the detection condition of each sensor and check that the display on the LCD
changes depending on the sensor status.
For instance, insert the paper through the document detection sensor or the registration
front / registration rear sensor, open the front cover or the back cover, etc.
(4) When the [Stop/Exit] button is pressed, the machine beeps for one second and returns
to the initial state of the maintenance mode.
Location of sensors
Document scanning position actuator
Document detection actuator
Control panel cover sensor
Paper eject actuator
Eject sensor
Back cover sensor
Internal temperature
thermistor
New toner sensor
New toner actuator
Fig. 5-7
Document detection / Document scanning position sensor
Registration rear actuator
5-17
Registration front actuator
Front cover sensor
Front cover
actuator
Registration front /
Registration rear sensor
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