Brother MFC8420 Service Manual page 162

(18) Disconnect the connector from the front cover sensor.
(19) Remove the bind B M3x10 Taptite screw.
(20) Remove the toner LED PCB unit ASSY.
(21) Remove the sensor clip.
(22) Remove the front cover sensor from the frame L.
Front cover sensor
Connector
Sensor clip
Toner LED PCB
unit ASSY
Taptite, bind B M3x10
Front cover sensor
Sensor clip
Fig. 4-142
4-81
MFC-8420/8820D/8820DN, DCP-8020/8025D/8025DN
Frame L
SERVICE MANUAL