AlphaServer is down because of a power supply issue. The unit has number 30-43120-02 (API-4030B-01), but from my research I cannot see any difference between that and the 30-43120-01 (API-4030), unless the former just has some tweaks to the internals for reliability or cost reasons. The outputs seem to be the same. The current loop plug is a different shape, but both have three live sockets that correspond, so that’s just a little surgery …
In summary, the stickers are the same and they say:
- Input: 200-240V AC, 7.0 A
- Out: 5.0V DC 52 A
- Out: 3.43 DC 37.4 A
- (These top 2 outputs can deliver 335W)
- 12.0 V DC 11 A
- (These top 3 outputs can deliver 420 W)
- -12 V DC 0.5 A
- -5.0 V DC 0.2 A
- (AUX) 5.0 V DC 0.6 A
- and a fan output.
I opened it up, but I can’t see anything wrong, and I don’t feel like testing all the capacitors, even if I could. So I ordered a replacement one. A friend did the hunting around and found a 30-43120-01 for a small fraction of the the cheapest 30-43120-02, so I tried that.
Here we go.
You can find service annuals for these on the web pretty easily.
https://vt100.net/manx/details/1,636
http://www.vintagecomputer.net/digital/Alpha_533au2/as120sva.pdf
The only read difference is that the current share plug is square on 02 and has 4 sockets and is linear on 01 and has 3; but of the 4 in 02, only 3 are used.
So you butcher up a new current share connector and they are interchangeable.
So the old machine is running again.
DSPACE 