Question about Yamaha RX-V870 Receiver

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Yamaha RX-V870 receiver front right channel not working

I think I may have caused this when I arced the speaker wire pair. Is there a fuse or something I can attempt to fix the A or B right channel not working?

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  • mcarbone Nov 09, 2008

    I see 3 fuses...one that looks like it is for the main power and then 2 on circuit board....they looked ok....I even tried to bypass them just to test and doesn't look like any of those 3 fuses I see are the problem. Are there any other fuses, or something else to test/investigate? Thanks for the help so far and any other help in troubleshooting/resolving is greatly appreciated!

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There is a fuse in side the system you could try but that sounds like the channels is shorted, but yet again there could be a fuse for it

Posted on Nov 09, 2008

  • Ivan Mcdean
    Ivan Mcdean Nov 10, 2008

    If you see three fuses thats probly it sometimes there hidden in other components but not so much annymore, did you look at the front right channel teriminal too see any black marks, cause like i said before it could of shorted

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As power amps are just two amps joined together all you need do is identify the left channel and compare it with the right. Ignore any parts common to both channels. The first thing to do is a visual check. If something looks broken burnt, or odd compared with the right channel then you have probably found the culprit. I suspect you could have a power output failure. It might be that the output devices are separate transistors. They might need to be replaced.
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Incoming from WHAT? Ampifiers accept inputs via RCA connections and send amplified audio to the speakers via the + and - OUTPUT terminals.

I'm guessing your colored wires are from your speakers and that there is a piece of this puzzle we do not see - how the speakers on the deck and in the dining area are wired.

You say, "was working ok previously"... previous to WHAT? Something changed.

You can probably troubleshoot and resolve this yourself.

Set the amp to a medium output level.

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The hiss is an indicator of the short (it has been shorted so long that one transistor set is probably bad. Look for a single strand of wire crossing from red to black speaker output on the receiver or at the speaker input on the speaker. If not there - you may have touched speaker wires together at one time - especially when volume was turned up.

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Good luck and drop a note on this site to let me know what you do.

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