Question about Kenwood Audio-Video Control Center VRS6100 Theater System
Computer speakers kenwood 81102310 it says to use a 13.5v power supply .the only one i have is a 12v.when pluged in i get a feedback noise. whats the problem?
If it is a low frequency hum(mains hum) you hear, the power supply is the wrong type. A 12 volt one will do but it must be a regulated type power supply. It will say this on the power pack itself if it is. If NOT, it will probably say nothing. Happy to answer any questions you may have, just ask away :)
Posted on Apr 07, 2008
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It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be your output drivers- the MOSFETS/IC's fitted for both the channels, Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise like a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.
You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board, maybe the protect circuit by itself is shutting off due to a faulty bias , maybe a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the protect is off then check for short on the speakers.
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