Question about Pioneer VSX-D411 Receiver
First I would like to verify that the buzzing noise is from the speakers, and or subwoofer and goes up and down with the volume control. 2nd if it is a noise inside the receiver then that would take us in a different direction, possibly to a chattering power or speaker protection relay.
Back to the intent of the first post, I was trying to determine if you were getting an analog hum or digital processing error in the audio.
So knowing which input, surround, on/off, DSP on/of settings would steer us in the proper direction.
The turn off pop is interesting, because it may indicate a voltage off set being applied/removed to the speakers or an audio processing malfunction.
An experienced technician would first verify the power supply voltages, speaker offset voltages and bias, and then isolate to the analog or DSP section.
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Posted on May 11, 2010
It seems like some component(s) become over heated by the time. It could be caused by either some faulty component(I guess Capacitor or Transistor in which case they must be replaced) or bad heat transfer(radiator, mounted on power transistors) that must be resoldered and/or screws/clips must be tightened.
Posted on May 11, 2010
In order to eliminate the overheating possibility, have you tried taking your receiver out of whatever enclosed space you have it, and run it like that?
Obviously this is not a solution, but rather a troubleshooting suggestion. If the receiver runs longer without popping and buzzing, then you have confirmed that heat is the issue. If it doesn't occur at all, then putting the receiver in a bigger enclosure and making sure nothing is lying on top of it is a possible solution. If the popping is delayed (i.e. it takes 30 min instead of 15 min), then repairs would be in order.
Posted on Aug 10, 2010
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Posted on Jan 02, 2017
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