I have a Pioneer VSx522 receiver. It has an intermittent problem where it generates a loud bang type static noise then the sound goes dead for a minute or so and returns to normal. It is getting more frequent and I stopped using it thinking it will damage something.
I have opened the unit up looking to see if there was an obvious burnt area that would indicate where the problem is. I am suspecting in the output board to the speakers. There is nothing obvious on the board. Do you judge I am in the right direction?
I understand there are codes that you can get from the unit pressing the right buttons on the front of the unit. I have tried to get the sequence to access the code without success. Do you have that information?
I appreciate and insights you could share with me.
I think you are more or less on the right lines.
Power transistors can fail in this way. Holes can open up in the semiconductor material of the power transistors and cause sudden discharges through the power transistors. This causes pops in the speakers, and results in DC offset which rapidly engages protection.
If you have experience in service and the equipment and experience to do the service this is potentially repairable.
I do not advise attempts at repair without test equipment, the correct tools and experience.
That is an older low end receiver, and actually performing beyond the life time I would expect.
You are correct to worry about damage.
I advise replacement if you can not do the repairs.
I recommend you choose a receiver at or above the mid price point.
