Oki ES3640MFP Component Replacement Manual page 48

Right Upper Door Latch Assembly
1.
Open the Top Cover.
2. Open the Basket Assembly.
3.
Open Upper Right Door.
4.
Release the 3 hooks that secure the Right Upper Door Interlock
5. Remove the 5 (metal, 6 and 10 mm) screws that secure the latch to the frame.
6. Gently pull the Upper Front Cover forward to release the latch assembly from the frame.
Right Upper Door Interlock Switch
Hook