Question about Sharp XL-HP515 CD Shelf System
Hi there, when I turn on my stereo it sounds great after 15 min there is a small buzz that starts than gets louder untill it's so loud I have to turn it off. I took the top case off to see if I can tell where the buzzing is, it seems to come from a transformer if that is it, how can I quite it? or is it a capacitor in a filter circuit? can't tell which one, or is it something else?????
If you have verified that the transformer is the source/cause of the buzz, then chances are that it is a case of loose core. In some, small/long bolts with nuts are used to clamp the core together while other uses a combo or varnish and clamps. Having said this, then the problem is mechanically induced and therefore would require simply tightening of the bolts or clamping the cover/core. It might also be of help to check for any mechanically loose component/object near the transformer;
If the problem is a power supply capacitor, then it would not be a buzz but rather a hum;
If the problem is a small value capacitor in the pre-amp circuitry, then the level of the humming/buzzing sound is controllable through the volume control.
This of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards.
Thank you for using FixYa.
Posted on Jul 09, 2008
Try this when the buzzing is there turn the sound down see if its still there if so then suspect a transformer or something inside and should go back to a factory service center near you.
Hope that helps.....
Posted on Jul 08, 2008
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