Power brick repair

Sorry, my last comment was intended to be sarcastic, it didn't come across that way I guess. However, if we go back to the original problem of reparing or replacing a TRS-80 Model 1 power brick : The TRS-80 has linear voltag regulators on the CPU board (I have the schematics here), the inputs on the DIN connector are therefore higher voltages than the required +5V, -5V and +12V. You cna't, therefore, conenct some of the wires from a normal PC power supply (be it a PC, PC/AT, or ATX supply) to a 5 pin DIN plug and use it to power an unmodified TRS-80 Model 1. You have at least 2 options if you want to use one. Either modify the PC power supply to give out highet voltages, and feed those into an unmodified Model 1 (but the PC power supply is likely to be undocumented...) or modify the model 1 by bypassing the regulators so that it taks in +/-5V and +12V (but then having a machine that will be ruined if you conenc tthe original PSU to it, and hoping that the rails come up in the right order to avoid damage to the DRAMs). Both strike me as quite abit of work, and require some electronics knowledge. The oriignal power brick cotnisn 4 components, one of which (the transformer) is not likely to have failed. They can all be tested using simple equipment (multimeter and a series light bulb). It stikes me that repairing the origianl brick is less work, and requires less electronic knowledge than using a PC power supply in this case. You comment would be somewhat more jsutified is I was commenting on repairing a complex regulated-output PSU .vs. replacing it with a PC supply. In that case ofteh the PS supply gives the right votlages, it's just a connector change. I don't like doing it becase, yes, I am a purist and I regurd the PSU as being part of the original design of the machine. But I can accept in thsi case that wiring a handful of wires to a connector is easier than doing battler with an SMPSU that decides to blow components off the board. -tony