I have a Marantz surround sound receiver number SR7500. When I turn it on the speakers buzz extremely loud, and after about 10 minutes it quiets down some but not completely. Can you give me advice as to what I need to look for to eliminate this buzzing?

Dried out electrolytic capacitor(s) shorted

http://firmware.marantz.eu/ Hope you know what you're doing.

it has a dry solder joint internally.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Marantz-SR7500-Receivers-manual/id/511dj778/t/2/

Page 42

There is a contact inside the jack that is closed when the plug is inserted. Apparently this is no longer happening. This should be an easy repair for a qualified technician.

I can see by the setup of this device, it can be confusing. So let's make sure you are setting the device to the correct "A" speaker outputs. These would all be on the rear panel, on the right side of the receiver. Is this correctly setup?

Hi 3303k

Strange dramas you are having there. I would suggest first, that you switch the unit off overnight(unplug at the wall) to allow for a fulll hard reset. Then fire it up in the morning again, and see if it behaves itself. I found a user manual for you online here

It is a good amp that you have, and hopefully resetting it will sort it out for you. If not, please do get back to me here and we shall look deeper..

Thanks for using FixYa, a FixYa rating would be great for looking into this for you. Happy to help further :)

regards
robotek

Check surround mode on the on-screen menu of the amp

I'd make sure that the receiver surround mode is set for one of the digital settings, such as Dolby Digital or DTS, and make sure that you have the center channel level adjusted to a level similar to the other two front channel speakers. I've seen/heard this happening when using dolby digital material & having surround set on something like 'hall' or 'stadium' or dolby surround, where only 4 channels are used & the amp has to 'mix' sounds to the left & right front speakers. It'll often sound like the actors on screen are talking out of the bottom of a barrel, with a hollow & tinny character to the voices.