- Remove the controller box cover (Removing the Controller Box Cover, Inner Cover)
 - Loosen the screws of the metal cover (
x12).
- Do not remove the screws.
 - Each screw slides into a larger hole 
when the cover is pushed to the left
.
 
 Slide the cover to the left and then remove it.
BCU
CNB
HDD
IPU Sub Board (Copier model only)
IPU
Controller Board