Oki ES3640MFP Component Replacement Manual page 83

Right Upper Door Interlock Switch
An actuator mounted on the Right Upper Door Latch Assembly penetrates the frame to activate a micro-switch
mounted above the Card Cage Fan.
1.
Remove the Card Cage Fan Duct.
2. Disconnect the connector from the Motor Driver Board.
3. Remove 1 screw that secures the micro-switch to the frame.
Replacement Note: Verify that the actuator properly closes the switch when the Right Upper Door is closed.
Imaging Unit Fan
1.
Open the Top Cover.
2.
Open the Front Door.
3. Remove the Left Front Cover.
4.
Remove the 2 (metal, 20 mm) screws that secure the fan to the frame.
5.
Gently pull the fan downward to remove it from the frame.
6. Disconnect the fan from the harness.
Right Upper Door Interlock Switch