Check Sensor Operation - Brother HL-5440D Service Manual

Maintenance mode functions for service personnel

1.4.8 Check sensor operation

This function is to check whether the sensors or electromagnetic clutch are operating
normally. While sensor operation is being checked, the Ready LED flashes one to three times
each time the sensor or switch status changes from ON to OFF or OFF to ON.
Operate the sensor OFF to ON as below to check the operation of the corresponding solenoid
or clutch.
Sensor operation
Change T1 paper feed sensor from OFF to
ON.
Change MP paper empty sensor from OFF
to ON.
Change registration front sensor from OFF
to ON.
Change registration rear sensor from OFF to
ON.
Change new toner sensor from OFF to ON. The develop clutch 51R remains ON for the
<Operation Procedure>
Activate the sensors or electromagnetic clutch shown in the illustration below, and check that
the Ready LED flashes. When the status changes consecutively, the Ready LED also flashes
consecutively. When checking of the T2 paper feed sensor and new toner sensor is
completed, the Toner LED lights.
Location of sensors
Registration rear actuator
New toner actuator
Eject sensor
Back cover
sensor
New toner sensor
Toner sensor
Registration front/rear sensor
The T1 clutch remains ON for the specified time.
The MP solenoid remains ON for the specified
time.
The duplex solenoid remains ON for the specified
time.
The registration clutch remains ON for the
specified time.
specified time.
MP paper empty actuator 2
Front cover sensor
Fig. 5-12
5-38
Solenoid/clutch operation
MP paper
empty sensor
MP paper empty
actuator 1
T1 paper feed sensor
T1 paper feed actuator
Registration front actuator
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