The invention relates to a cradle unit for a print engine having an inkjet printhead and a PCB controller, the cradle unit configured to receive a cartridge unit having a printhead assembly of the print engine with a controller on a flex PCB. The cradle unit includes a cover assembly movable between a closed position, where the cartridge unit is mechanically secured in the cradle unit and the PCB controller of the print engine electrically contacts the flex PCB controller such that power and data signals can be transferred therebetween, and an open position where the electrical contact is broken and allows the cartridge unit to be removed from the cradle unit. The cradle unit also includes a maintenance drive assembly having a motor operatively connected to a maintenance gear and actuator arrangement and to a wiper gear and actuator arrangement, the maintenance drive assembly operated by the PCB.