The power supply in my trusty Soundcraft Protracker gave up it's magic smoke this week, and rather some diode replacement, it's up and running, but rather than 55/17/-17, it's putting out 66/17/-27.

Since it's an internal supply, I don't see a lot of options for getting a replacement, and I don't have a schematic for it. I'm debating between starting to replace resistors until I find the bad ones, but was also thinking of just modernizing with an external power supply (e.g. building one into a small box). Anyone have leads on either where to obtain said power supplies to build into a box, or thoughts about trying to fix the old supply? From what I've seen online, these power supplies are prone to going south and are finicky.

Thanks- nice to be posting to the new/old forum!

Andy

not familiar with the model--is it a linear or switch-mode power supply?if linear it should be rebuildable...there may be a performance benefit from a remote supply but IDK if it is worth it for the level of gear that has inbuilt P.S. engineered in.

there may be a switchmode bipoalr module or modules that, if remote enclosured could offer weight and energy economy if they can be integrated without creating noise or hum problems.

linear is reliable and easier to design/maintain. wastes energy and weighs more than s.m.

edit:
recheck your work, maybe a solder bridge or short somewhere--are you measuring it loaded? (dummy load!)