Got a 15 volt 40 amp SMPS bench supply that has recently started shutting off for no apparent reason. Turn it on and leave it running with no load and anything between 5 minutes and 2 hours it just goes off. Display goes out too. Like it was unplugged from the wall. Turn the AC mans off and wait for a short time and turn it back on and away it goes until next time it decides it's had enough. If you turn it off then back on too soon it doesn't restart so it sounds like it might be *wrongly* tripping some kind of overtemp or overload shutdown.
is anyone familiar with these PSUs? Likely they are packaged and sold under various names worldwide. Anybody got a schematic? I'm quite okay with working on SMPSs.