Brother HL-L9300CDW Service Manual page 210

9.20 Front Cover Sensor
(1) Release the wiring of the Front cover sensor.
(2) Release the two Hooks and remove the Front cover sensor from the Main body.
Hook
Hook
Front cover sensor
Main body
<Front side>
Fig. 3-80
Harness routing: Refer to " Process Drive Unit, Front Cover Sensor, Main Drive Unit"
3-69
Confidential