Marantz Sr8500 so i recently bought a Sr 8500 and when im watching a movie using that with the speakers it works fine but when the movie sound gets louder the speakers stop and the words "protect" shows up on the Sr8500 and well the speakers will eventually start working again when the movie sound becomes less loud. but its just annoying and i can't figure out why so someone please help

screen tube /supply are defected

No! there is a problem in the audio output ic's "more than likely shorted parts" check to make sure there are no shorts in the speaker wiring, if okay! I'am afraid it is bad outputs.

The audio output stage has a load causing the auto protect to kick in. First check speaker wires for shorts, if okay it is the above mentioned.

Hi, try to turn down the input balance knob, I think you have overloadet it.

The same thing happened to me and i just had to reset the system by turning it off and then holding input+settings for like 5 seconds until it shows what firmware version you've got it meqans it's reseted and that should solve your problem.

Just finish repairing Marantz SR 940 with no sound output. Problem was a clamped speakers relay located behind the speakers lugs (red and black post connectors). To reach the relays you must remove the little circuit board behind those colored connectors et unsolder the posts. There is 2 relays, one for A set and one for B set of speakers. Very EASY when you know the solution!!

Check the settings on your dvd player!. It might be set to PCM
instead of HDMI.

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.

please repeat your setting first- and then disconnect all speaker out.
connect your speaker one by one until you find the bad one and change it-you can also apply contact cleaner spray over volume control and move it many times-please do not forget yo unplug headphone jack first.