Pioneer VSX-823 crackle poppong sound then power out

kwalsh24
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Posts: 4

Pioneer VSX-823 crackle poppong sound then power out Jul 23, 2016 16:49:52 GMT -5 via mobile

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Post by kwalsh24 on Jul 23, 2016 16:49:52 GMT -5

I have a Pioneer VSX-823 av unit that just started giving me issues last night and today. I turned the unit on last night. Had it on for an hour and randomly it started to send out loud snapping pops out of all the speakers. Then it powered itself off and the HDMI light started flashing. I left the unit unplugged for the night and checked it today, same issue. No power up just flashing HDMI light. I managed to get the system back on by holding the standby & advanced surround. Unit fired up and went nuts with the speaker popping and then it started to flip relays on and off (relays on the speaker output)and that's where I am now...

I was doing some research and some users have managed to get various pioneer units to display error codes... Using the key sequences that I found didn't display anything on my unit.... Is there a way? Any idea what's happening with the amp to cause the speaker popping ?

I'm decent with repairing electronics. Just not sure where to go with this one. I did check the ohms on the KTC3964 voltage regulators and a could of them were finicky with giving readings so perhaps that's an area to start?

Any help would be greatly appreciated! Willing to try to repair this unit before going out and getting Yamaha lol. He'll if I can repair it and sell it off to help pay that would be great too.

mastertech Global Moderator Posts: 3,531	Pioneer VSX-823 crackle poppong sound then power out Jul 23, 2016 20:48:08 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by mastertech on Jul 23, 2016 20:48:08 GMT -5 The flashing HDMI led is DC protect notification. Having to bring it out of protect pretty much confirms that. Try disconnecting all the speaker outputs and see if it turns on normally.
	MT

kwalsh24
New Member

Posts: 4

Pioneer VSX-823 crackle poppong sound then power out Jul 23, 2016 22:22:37 GMT -5 via mobile

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Post by kwalsh24 on Jul 23, 2016 22:22:37 GMT -5

The unit turns on similar to how it does when there are speakers attached. It randomly starts to flicker the relays on and off then sometimes it turns off into protect and other times it doesn't. I hooked up the centre channel only to verify the pop / crackle still exists and it does.

I've also disconnected the amp board and the unit turns on fine. Third I've tested the ohms on all of my speakers / wire and they all read the same (or crazy close)

Last Edit: Jul 23, 2016 22:28:31 GMT -5 by kwalsh24

mastertech Global Moderator Posts: 3,531	Pioneer VSX-823 crackle poppong sound then power out Jul 23, 2016 22:46:48 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by mastertech on Jul 23, 2016 22:46:48 GMT -5 Sounds like you have a problem on the amp board.
	MT

kwalsh24 New Member Posts: 4	Pioneer VSX-823 crackle poppong sound then power out Jul 24, 2016 18:13:56 GMT -5 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by kwalsh24 on Jul 24, 2016 18:13:56 GMT -5 Thanks... All signs of what I'm doing seem to point to there. Anyone have any suggestions as to where I could look for issues?

mastertech Global Moderator Posts: 3,531	Pioneer VSX-823 crackle poppong sound then power out Jul 25, 2016 10:10:33 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by mastertech on Jul 25, 2016 10:10:33 GMT -5 Check the output transistors first.
	MT

retiredhvac: Onkyo TX-SR353 Service Manual Request. Tried to contact forum member who offered it but no reply. This unit may share identical traits with a Pioneer.

Sept 16, 2023 16:02:07 GMT -5 *

mastertech: Not finding much. Maybe get the part numbers off those 2 devices mounted on the heatsink near that resistor. Sept 15, 2023 21:03:01 GMT -5

dirty666: I have a boston Sounware XS Digital Cinema 2012.02.10 and one resistor is defekt/burned.I need a chematic....can you help me Sept 10, 2023 6:49:26 GMT -5

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Pioneer VSX-823 crackle poppong sound then power out

Post by kwalsh24 on Jul 23, 2016 16:49:52 GMT -5

Post by mastertech on Jul 23, 2016 20:48:08 GMT -5

Post by kwalsh24 on Jul 23, 2016 22:22:37 GMT -5

Post by mastertech on Jul 23, 2016 22:46:48 GMT -5

Post by kwalsh24 on Jul 24, 2016 18:13:56 GMT -5

Post by mastertech on Jul 25, 2016 10:10:33 GMT -5

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