This unit has an open power transformer on the control board. There are two secondaries. One goes to the display and the other goes through a simple rectifier which has a 25V electrolytic across it. Can I assume that these secondaries are around 30V and 12V? The control board is PN15545. The chip is Sanyo who could be the OEM but I don't know. Any opinions? Thanks, Lenny Stein, Barlen Electronics