Xerox Phaser 7400 Service Manual page 427

7.
Turn the feeder top upright, and the release the 2 hooks that secure the sensor
housing to the top of the feeder.
8.
Release the hooks that secure the sensor in the housing.
9.
Disconnect the sensor connector (P/J42), and then remove the sensor.
Replacement Note
Use care when replacing the feeder top. Make sure the Level, and Low Paper
Sensor flags operate properly before tightening the screws.
Service Parts Disassembly
Feeder Assembly
Feed Out #2 Sensor
Registration #2 Sensor
Sensor Cover
s7400-529
8-49