Hi everyone,
So, I got a Xantrex XFR 600-2 PSU.... 600 V, 2 A... what can possibly go wrong? Except that right now it's in pieces.
Most of the boards seem to be there.... except for one that has the output regulation on it (See pic below. Red outline indicated missing board aroud the XFMR board. Blue outline is for a ribbon cable I suspect has some aux. voltages for the main board)
![](https://www.eevblog.com/forum/testgear/any-xantrex-xfr-psu-owners-out-there-help-needed-in-reverse-engineering-a-board/?action=dlattach;attach=484538;image)
Have no idea if there's something actually wrong with it, but I am planning on putting it back together and make it functional again.
And of course, the manual from Xantrex is extremely sketchy when talking about schematics or anything having to do with detailed explanations about how the thing works. So that's not going to be of much help... And neither would the Sorensen DCS 600 series... I've looked and nothing of actual help in there.
So, going a different route, from what I've managed to gather from online images of the unit and Dave's Xantrex teardown a couple of years ago, the missing board isn't all that complicated. Just some diodes for the putput regulation, some caps and a few passives. And this is where I actually need your help.
What would be nice is if some kind soul that actually owns a 300V or 600V unit (output board seems to have the same layout...I think) would be so nice as to take some detailed pics of the output regulator board so that I can reverse engineer the thing and make my own board.
![](https://www.eevblog.com/forum/testgear/any-xantrex-xfr-psu-owners-out-there-help-needed-in-reverse-engineering-a-board/?action=dlattach;attach=484508;image)
So, getting down to business...In the red higlighted area, those seem to be the diodes for the output, both the main one and for the auxiliary voltages. The yellow contour is the rest of the board with some caps and some huge caps on it. The area in blue has some 8 pin IC and some traces going to a ribbon cable that I suspect is for the auxiliary voltages.
It'd be nice to identify the traces goign from which transformer connection to which diode and also how the diodes are actually connected and their part numbers. Also some detailed pics of the 8 pin IC and ajacent parts would be higly appreciated.
Also, refering to the ribbon cable that I suspect is for the aux. voltages, I founf in an old Sorensen DSC manual that the aux voltages are +/- 5V, +12V, +18V and a 6.2V reference line. Would someone be willing to get out a meter and see if this is indeed the case on that ribbon cable and also which pis has what voltage ?
![](https://www.eevblog.com/forum/testgear/any-xantrex-xfr-psu-owners-out-there-help-needed-in-reverse-engineering-a-board/?action=dlattach;attach=484520;image)
This is where that ribbon cable ends up, on the main board on a white 8 pin connector
![](https://www.eevblog.com/forum/testgear/any-xantrex-xfr-psu-owners-out-there-help-needed-in-reverse-engineering-a-board/?action=dlattach;attach=484514;image)
Oh, and there might be indeed a reason why the output board is missing... it must've got out and walked away. How do I know this? It looks like someone tried to prevent other board or parts of the board from walking away because of the way some parts were soldered.
![](https://www.eevblog.com/forum/testgear/any-xantrex-xfr-psu-owners-out-there-help-needed-in-reverse-engineering-a-board/?action=dlattach;attach=484532;image)
![](https://www.eevblog.com/forum/testgear/any-xantrex-xfr-psu-owners-out-there-help-needed-in-reverse-engineering-a-board/?action=dlattach;attach=484526;image)
Yep, got a lot of work ahead of me, but hope some out there cand help me at least get started on this
![Tweak :-/O](https://www.eevblog.com/forum/Smileys/default/smiliey_cal.gif.pagespeed.ce.yYMcAvxBJk.gif)