Onkyo TX-NR626 popping sound from all speakers

[dobrykamil]

Hello.

Initially, I got this AVR of ebay with faulty center channel. Now it works ok, but from some reason when I change channels on my satellite receiver or inputs from SAT/CBL to NET for example, I hear this very annoying popping sound coming from all connected speakers. This noise can be also heard when:
1.I navigate through folders on my media center PC
2.When I switch it off - here, the popping sound is even more loud, but not all the time.
I have measured speaker output on the cenetr channel,and in the exact moment when I hear this popping sound I was getting between -55 and 110mV DC on my multimeter.Does anyone know, what could cause this issue?
Here is a short video where you can hear the popping sound while I switch it off.
sample

Any help would be much appreciated.

[keeney123]

Re: Onkyo TX-NR626 popping sound from all speakers

Do you have the service manual or the schematics to the receiver. This would be useful in troubleshooting the problem.

[dobrykamil]

Re: Onkyo TX-NR626 popping sound from all speakers

Do you have the service manual or the schematics to the receiver. This would be useful in troubleshooting the problem.

Hi.
Thanks for your reply. Service manual attached.

[dobrykamil]

Re: Onkyo TX-NR626 popping sound from all speakers

I was thinking, hooking up two wires between hdmi board and pre-amp to my 2 channel amp. This should tell me if the problem occurs on the digital or amp side.

[keeney123]

Re: Onkyo TX-NR626 popping sound from all speakers

I was thinking, hooking up two wires between hdmi board and pre-amp to my 2 channel amp. This should tell me if the problem occurs on the digital or amp side.

So how much experience do you have repairing this type of equipment? You have seen the precautions on the power board? On page 37 you have set the idling current? Page 50 it talks about a Hi-Z on some signals when booting DA830.