[Darryl Ramm]

OK so it looks like a SIL (single in line) voltage regulation daughterboard, bunch of resistors, caps a few diodes and what is likely an 8 pin voltage regulator/DC to DC converter.

And what looks like one obvious issue with what looks like a big-ole crack through capacitor C4.

So you can't just buy this anywhere-- it's a daughterboard from ancient times. I think a part of the power supply module, so possibly not even designed by Digidesign or whoever designed the actual 003. Even for places who might have ancient parts or breaking down used 003 I doubt anybody will have one or sell it. But if you managed to find a user power supply this ought to be included. But confirm it came off the power supply board. If you had to buy a used power supply I expect it would be easier to just buy another used 003 that works and then you can work out if you use that or swap power supplies.


But why did the repair technician not try to repair this daughterboard for you? And calling it a "chip"??? Did he mean the voltage regulator IC chip on that board? Are the marking on the 8 pin IC legible? And why return the daughterboard to you and then you are trying to track it down. Why did they not suggest fixing it for you? Something smells bad here. Like they got a fee from you to open it up poke around pull something out and then toss a thing at you and it's your problem? How much did you pay them for that? I'd likely expect a good technician to give you a price estimate to repair that board, and likely expect them to point out it's not economically justifiable. The big question is is the rest of the whole power supply looking OK or not? Could he power up that PSU on the bench?

Why did they not try replacing the cracked C4 SMD capacitor?

It might not take long to reverse engineer the circuit, and guess the IC even if the markings are not legible. But to pay somebody to do that. Meh. These 003 are not worth much, you might be able to replace it from eBay or similar or give up on it and buy a modern interface.