be used throughout the drawings to refer to the same or like parts fig1 depicts an image forming apparatus 10 including a housing 12 with a top portion 14 a subunit 16 separated from the housing 12 by pivoting about a hinge point 18 the media sheet transport belt 20 and the photoconductor units 24 are mounted to the subunit 16 to allow the photoconductor units 24 to clear the housing 12 when the subunit 16 is opened the photoconductor units 24 are first decoupled from the drive mechanism couplings 26 within the housing 12 that supply rotary power to the photoconductor units 24 additionally to remove or insert a developer unit 28 from or into the housing 12 at least the developer unit 28 of interest must be decoupled from the drive mechanism couplings 26 that supply rotary power to it furthermore since the developer units 28 are inserted and removed from the housing 12 in a direction at approximately right angles to the axes of the rollers within the cartridges the drive mechanism couplings 26 must be decoupled to provide mechanical clearance for the removal or insertion of the developer unit 28 cartridges in one embodiment each of the drive mechanism couplings 26 to developer units 28 and photoconductor units 24 are decoupled and or retracted substantially simultaneously allowing for.