Question about Sherwood RV-4050R
Your unit gone to overload that caused the subsequent shutdown. To isolate the input and speakers from fault, disconnect all input cables and speaker wire from the unit then turn it on naked. If the symptom still there then this is a clear indication that the fault came from the unit itself. Most common caused of this problem is the sound output circuitry and the power supply. Most common affected parts in the output section is the output IC/transistor(mounted in the large heat sink). It will fail because of exposure to excessive heat due to frequent high volume and or because of aging. Bad solder joints is also to consider to this section and also to the power supply section. Because of heat build up, most of the joints dried resulting to poor flow of the supply and trigger the over current(overload) protection circuit. Leaky electrolytic filter capacitor is also one of the factor in this fault. It will produce an out-of-regulation to the power supply output. You must have a capacitor checker to determine its condition. Sometimes it has a bulged/dome at the top but not all.
If you don't have necessary tools and test instrument and can't troubleshoot the symptom, I would advice you to look for an experienced technician to isolate the problem.
Hope I helped you.
Have a nice day!
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Posted on Apr 02, 2011
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Posted on Jan 02, 2017
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