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January 17th 19, 05:41 PM
posted to rec.radio.amateur.homebrew
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Astron RS-12A Repair Help
On Saturday, January 18, 2003 at 12:10:59 AM UTC-8, Roger Leone wrote:
Woods: Power supplies like yours are pretty easy to repair, but the best way is not to randomly replace parts. There are many possible problems and you need to approach the troubleshooting in an organized way, eliminating what is working and moving on to what isn't. You will need a volt/ohmmeter for this work. Here is a link to a schematic that works: http://www.repeater-builder.com/rbtip/rs12a.html As a previous poster suggested, check to see if you have AC coming out of the transformer. If you don't, check the fuse and switch on the primary side. If they are good and you still have no AC out of the transformer, and all the wiring seems OK and you have 117 volts AC going in the primary, then the transformer may have an open secondary winding. This is unlikely, but you should check to be sure. If the transformer is bad, you need to decide how badly you want to repair the supply, as that is the most expensive part. |
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