The invention provides for a printed circuit board (PCB) assembly for a pagewidth printer. The assembly includes a number of modular printhead controller PCBs each configured to control a respective modular printhead integrated circuit, and modular supports defining a raised portion and a recessed portion at an end thereof. Each PCB has electrical connecting strips which operatively overlie the respective recessed portions. The assembly also includes at least one connecting member for operatively connecting respective PCBs to each other, each connecting member having a series of parallel spaced conducting strips, said member shaped and configured for fitment into a cavity defined by the raised and recessed portions of two abutting supports to connect the connecting strips of two PCBs via said conducting strips.