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Troubleshooing power supply to component level
Greetings, power supply fans!
I am in the process of getting a dead emachine going, and first found that I have a bad power supply. Any info from the guru’s on how to troubleshoot it to the component level and save it from the landfill? I know replacing it is cost effective, but this is a for a hobby and I’d sure appreciate some info. Also, I’m stuck with no schematic. I put up some info here on my new adventure in the emachine world: http://www.geocities.com/hbyardsale/emachine.html |
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etorg (HBYardSale) wrote in message ...
I am in the process of getting a dead emachine going, and first found that I have a bad power supply. I know replacing it is cost effective, but this is a for a hobby FAQs: www.nutsvolts.com/PDF_Files/PSRepair.pdf www.repairfaq.org/sam/smpsfaq.htm Unplug the AC cord before doing any work (do not simply turn off the switch, even a power strip or surge protector switch), and never operate the supply except with its cover installed (including screws) and its power cord plugged into a grounded 3-prong outlet (not all 3-prong outlets are grounded). All diagnosis can be done with the supply unplugged, by using a simple volt-ohm meter. Exact replacement parts are usually difficult to find, and many do not cross to any NTE substitutes. Fortunately close substitutes are rarely needed for computer power supplies, and you can almost always use anything that meets or exceeds the original component's voltage, current, and power ratings and is of the same general type. Types of transistors found in computer power supplies are NPN and N-channel MOSFET, types of diodes are regular, fast recovery, and schottky. In other words, do not substitute a MOSFET with an NPN or a schottky with any other type of diode. |
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