Brother DCP-7055 Service Manual page 283

(3) Check that the display on the LCD is changed when the detection condition of each
sensor is changed. For instance, insert paper to the document detection sensor or the
registration front (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
Paper eject actuator
Paper eject sensor
Back cover sensor/
Duplex tray sensor
Internal temperature sensor
New toner sensor PCB ASSY
Document detection actuator
Document scanning position
detection sensor
Document scanning
position actuator
New toner actuator
Fig. 5-8
Document detection / ADF cover open sensor
Fig. 5-9
5-17
Registration rear actuator
Registration front actuator
Front cover sensor
Front cover actuator
Registration
sensor PCB
Paper edge sensor
Paper edge actuator
ADF cover open actuator
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