Question about Yamaha RX-V995 Receiver

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RXV 995 SUB output is DEAD

I bough a 995 on craigslist. The sub output is dead. Yes, I have it turned on in the menu and have set to "both" mains & sub.
I have tried different subs to make sure. I have a rxv 2095 so I know the product. What would cause just the sub output to die? Ths other outputs work fine. Just the sub port is dead. Lose solder joint or worse?
Would the sub out be seperate from the main out signal? I am using the main out as sub signal port. It works fine. Have at it...

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  • translunar May 03, 2009

    Update. I have found during testing that the sub output does in fact have signal. Its the rca connection that is bad. If you pull down on the cable you get sub output. When you take the pressure off, its gone. I tried different cables with minimal difference. Can I fix this by modifying the rca cable? Making the center pin "fatter" so it will make a better connection. Or should I pay a service center to solder in a new terminal?

  • translunar May 11, 2009

    Update....

    I removed the top of the unit. I then took my multi meter and checked for signal. There was no signal at the solder joint for the RCA jack. I was confused, as I was able to get signal by pulling down on the RCA cable. I put the cable back in and plugged the unit in to AC power with the top off. I played an FM station and tested again for signal, There was signal when torque was applied to the cable! I could physically see the solder joint move when I pulled on the cable. Simple fix...just re-solder it....NOT! I de-soldered and cleaned the area. Then I re-soldered it. Well...the solder was not connecting to anything. It looked good, but no signal. De-solder and clean....check for signal......nothing!!! Ok, I get it now. The etched path on the circuit board was missing right around the solder joint. The board looks like it was removed before I got it. Someone tried to fix it. Well I finally fixed it by drawing my own signal path with a strand of wire from a speaker cable. It aint pretty. But it works, and the sub hits hard and clean. One more thing...I found the speaker ohm selector completely void of solder. It was sparking when touched. So, I reached in and pulled the swithch right off the board. I unplugged the AC power and removed the board. I soldered it back together and its fine now. I got a great Yamaha for $65.00! It kicks *** and was worth all the insanity. I would do it again! That is what makes it so special. The thrill of the fix is addicting!

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If there is a real failure in the Sub Output it would indeed be unusual. I'd still sift carefully through all of the settings. The Sub Out is very likely to be its own unique channel so I would try something that bypasses multichannel decoding entirely, like plug in something low-bass-rich to the Subwoofer (IN) at the External Decoder area on the left rear of the unit. Press Ext. Decoder and see what comes out of the Sub output. This bypasses all DSP and could prove if the Sub Out really does work.

Does it not work in speaker level setup either? That at least would eliminate any source issues.

Posted on Apr 14, 2009

  • David Dunn
    David Dunn May 03, 2009

    It does sound like a simple break in a conductor. If it's inside it may not be easily accessible to to for examination or repair.



    One thing you don't want to do is rig it so there is torque or mechanical stress on the RCA connector. Eventually soomething would have to give and the price of repair never goes down as the damage goes up.



    Is the outer ground (shield) connection tight enough on the RCA cable? Either the + (pin) or - (outer) connector making bad contact will give the same result. Some RCA cable have visible multi-tabbed outer conductors that can be tweaked a little to be tighter on the jack. You might luck out an orientation that gives good contact.

  • David Dunn
    David Dunn May 11, 2009

    Great fix. Thanks for the update.

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