Been sorting through my various board, getting most of them working (but finding at least one dead regulator). Noticed this wasn't on the PSU Pictures page.
It uses a UM1233 modulator, which I've not seen on any of the others. Weird. Also, terrible picture in this case...
Dragon 32 PSU board picture, "48086?" "Issue 6?"
Re: Dragon 32 PSU board picture, "48086?" "Issue 6?"
Is the REG3 isolated? Asking since typically this one shouldn't be touch the cooling plate since it shorts the PSU board.
Re: Dragon 32 PSU board picture, "48086?" "Issue 6?"
I did wonder about that, just hadn't got around to unscrewing it. It all looks like it's been that way since it was made, but it's worth a go.
Re: Dragon 32 PSU board picture, "48086?" "Issue 6?"
Ciaran,
Thank you for the pictures!
They are indeed interesting. It seems that the power part is the same and they made a new board issue to accommodate this particular RF modulator model.
Cheers,
Rob
Thank you for the pictures!
They are indeed interesting. It seems that the power part is the same and they made a new board issue to accommodate this particular RF modulator model.
Cheers,
Rob
Last edited by robcfg on Mon Jun 15, 2020 6:37 am, edited 1 time in total.
Re: Dragon 32 PSU board picture, "48086?" "Issue 6?"
Reg3 looks like it has the insulation kit there, I think it consisted of a piece of mica? and an insert washer for the screw hole, along with some thermal paste (the white stuff round it).
Something like this : https://uk.rs-online.com/web/p/heatsink ... s/7128225/
Cheers.
Phill.
Something like this : https://uk.rs-online.com/web/p/heatsink ... s/7128225/
Cheers.
Phill.