Question about Sharp CD-BA2600 CD Shelf System
I changed many capacitors too but the problem is same.
Pardon me for asking why do you have to changed the capacitors, cap usually have rating and values, unless you have good reason to changed these, ensure you are replacing the same ratings.
noise from radio usually occurs if there is interference of some sort, or insufficient or fluctuating voltages
if the sound seems high pitch, then it is from capacitors you have replaced
Posted on Oct 22, 2008
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Dec 12, 2012 | Sharp XL-HP500 CD Shelf System
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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