Question about Radio Shack TRC-447 CB Radio
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Posted on Jan 02, 2017
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When the power was reversed this shorted out one of the components, possibly an Operational Amplifier. This tells me that there is no diode protection and possibly the circuitry is exposed directly to the input power supply. The fix would be to find the shorted component with the use of a schematic and a multimeter. Once you correct the shorted component then if possible you can add diode protection by putting a diode (forward biased direction) in the path of the positive line.
Again you will need a schematic, and a multimeter to work on this problem.
I hope this helps,
Oct 12, 2007 | Uniden PC78ELITE 40-Channels Base CB Radio
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