Abstract: Electrical components in an elongated array are suspended within the interior of a sleeve type closed loop member such as a rotatable photoconductor drum or closed loop belt of a compact copier. Preferably some of the components are mounted on a board and held within the sleeve by edge slots or the like in sleeve mounting end caps, attached to the machine frame. A drive motor can be attached as part of the array and further can be arranged to drive a fan blade so that cooling air is forced through the sleeve and over the components so that the sleeve acts as a plenum. Power can be coupled from the drive motor through the end mounts to motivate the sleeve in the direction of its closed loop and/or apply power to other components of the copier.