Tech Square

Technical and speculative discussion of amps, cables and other topics.

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RE: CD Player problem.

Posted by Old nuff 2 no better on March 20, 2008 at 21:53:02:
Remote troubleshooting is just a guess, but I'll guess you had a tantalum in backwards. They take about a minute or less to overheat and short out. It likely took something else out with it, maybe whatever was providing the signal upstream. It could even have opened a trace. Check that everything has power with a DVM, and do a careful visual check with a magnifier everywhere from the power supply on. If you have a scope, trace back from the opamp input, looking for signal. Mods without test equipment and a schematic are always a bit risky because when something goes wrong, it can be tough to find.