Oki ES3640MFP Component Replacement Manual page 44

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, 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.
Tray 1 Feeder Board
1.
Remove the Tray 1 Paper Feed Unit.
2. Remove 3 (metal, 10 mm) screws that secure the hand holds to the feeder.
3.
Remove 1 (metal, 6 mm) screw that secures the Feeder Board Cover.
4. Remove 1 (metal, 6 mm) screw that secures the Feeder Board to the Feeder.
5.
Disconnect the connectors, and then remove the board.
Feed Out Sensor
Tray 1 Feed Unit
Registration Sensor
Sensor Cover