Question about Audio Players & Recorders
The ports for the left speakers, both A speakers and B speakers, do not work. Can I replace those, or change out fuses? If so, how?
Fuses will be on the inside of the amp. you will have to disconnect it from the power and open the box to get at the fuses( some fuses are accessible from the outside of the amp) also, you may have blown the input or output section of your amp. this is not easy to fix at all. you can blow it from playing your music too loud or from a loud source. while the case is open, have a look at the solder joints on everything. if anything is brown, covered in white residue bulging, melted, burned or looks disconnected, that is probably the problem.
Posted on May 23, 2008
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Posted on Jan 02, 2017
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Dec 23, 2011 | Audio Players & Recorders
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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