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Pioneer VSX-1121 Display works but no sound

 
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jimkarl




Joined: 23 Jun 2016
Posts: 3



PostLink    Posted: Thu Jun 23, 2016 5:56 am    Post subject: Pioneer VSX-1121 Display works but no sound Reply with quote


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Title says it! I can get to every display menu/item but regardless of settings or source there is no sound from any output. Tried simple analog sound sources (cd, tuner etc.) tried CD direct. Tried factory reset. Got service manual and went through diagnostic, no errors showing, No sound at headphones or pre out. Manual says replace audio assy.

Question is - is there a known component repair that can be done on that board without a wholesale board swap? Not worth the cost to me if that is the only solution. I have the tools/skills to test & replace components though, unless it's like a 60 pin IC or similar. Just need the guidance as to what is the source component problem, if known. Thanks!
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Curt Palme
CRT Tech



Joined: 08 Mar 2006
Posts: 23992
Location: Langley, BC

TV/Projector: All of them!


PostLink    Posted: Thu Jun 23, 2016 2:48 pm    Post subject: Reply with quote

Sounds like the speaker protect relay isn't kicking in. See if you can find the schematic online and troubleshoot from there. There's no one single cause that will give your symptoms.
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jimkarl




Joined: 23 Jun 2016
Posts: 3



PostLink    Posted: Thu Jun 23, 2016 3:56 pm    Post subject: Reply with quote

I hear the relay clicking on power on. Also, if that were not working, I would think there would most likely be a DC fault but none is reported on the diagnostics. According to the schematic, the headphone output is prior to the relays anyway, and there is no audio their either. Same with the pre outs.
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Curt Palme
CRT Tech



Joined: 08 Mar 2006
Posts: 23992
Location: Langley, BC

TV/Projector: All of them!


PostLink    Posted: Thu Jun 23, 2016 3:58 pm    Post subject: Reply with quote

Sorry, no idea then.
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WanMan




Joined: 19 Mar 2006
Posts: 10273



PostLink    Posted: Thu Jun 23, 2016 4:10 pm    Post subject: Reply with quote

There should be two instances of clicking. One where you power on the receiver, and a second one about a second or two later and that presence the sound. This is how it is on my two pioneer receivers.
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jimkarl




Joined: 23 Jun 2016
Posts: 3



PostLink    Posted: Thu Jun 23, 2016 5:17 pm    Post subject: Reply with quote

yes two clicks. One on initial power up, second a few seconds later. As mentioned above, I do not believe there is a problem with the relay or the circuit that drives it. It seems to to be more of an audio routing issue.
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Curt Palme
CRT Tech



Joined: 08 Mar 2006
Posts: 23992
Location: Langley, BC

TV/Projector: All of them!


PostLink    Posted: Thu Jun 23, 2016 5:59 pm    Post subject: Reply with quote

It's quite possible that one of the LSI chips has a cracked solder joint underneath. Many AV receivers are known for that. Not worth repairing, I've thrown out many Pioneers due to this.
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