Smoke From PSU Socket

It is normal to replace the enbtire assembly, and it's quite likely that a suitable replacement can be obtained. Of courde you might want to have a go at repairing it. Whether this is possible depends on what has failed and if you can get inside the module. If it is a normal filter assembly, it will contain a bifilar-wound inductor (which is almost impossible to obtain as a 'loose' component) and 3 or more capacitors (which are avialable. There may be aschematic on the can. If you get continuity from the liv/neutral pins to the tags to whci hthe itnernal wires are connected, then the inductor is probably OK. Most of the time if there are problems it's one of the capacitor that has failed I suspect some of thse modules are filled with 'potting compound' (a mad friend of mine clals this 'potting compost' :-)) which makes repairs almost impossibel. Some DEC machines have a filter in a square metal can about 6cm on a side on the back of the inptu conenctor, the lid is soldered on. I think you van probably desodler the lid with a _large_ solderign iron and repari it. The type that looks like deep IEC socket behidd the panel is probably not repariable. -tony