HP 25 new internal power supply

[Dreato]

Thanks for the info and the schematics. I noticed that the LC oscillator is on that board, too.

I think I have problems with this power supply. The voltages are OK, but are noisy. I'll have to remove the daughterboard to checks caps, diodes etc. It looks like this board is soldered to the main board in 5 places. Is this correct?

Thanks again,

Dave