Sharp R1900M microwave oven Power unit PCB (LV transformer board)- DPWB-A565DRKZ
Part number DPWB-A565DRKZ or 2528460 Item 1-24 on the attached diagram. Buffalo GK640, Buffalo GK641 cooling fan assembly - DE31-10180A. Buffalo GK642, Buffalo GK643 cooling fan assembly - DE96-00108C.