Question about Mitsubishi M-VR900 Receiver

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No output to the speakers from any source

I've owned this AV receiver for 7 years and it has performed flawlessly as part of my Mits Home Theater system. Recently it has been taking several minutes for the input signal to be recognized by the tuner and for the output to the 5 speakers + subwoofer to kick in. Now, I can't get any source to kick in at all. One interesting point; when I tune the FM input to a strong stereo channel and insert headphones in the jack, I can get the sound through the phones if I crank the volume. I've tried every reset possible. Any ideas on next steps to solve this would be helpful. I'm fairly certain there is not a problem with the speakers themselves. I've tried re-securing all of the wiring as well.

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  • Anonymous Mar 06, 2009

    Same deal

  • Mojorisin65 May 25, 2009

    Same problem it's a cold solder joint on the board behind the MITS logo.

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I bought a Mitsubishi M-VR700 which produced no audio from the speakers, but with headphones, a tiny bit of audio was detectable with the volume on max.
the following solution was posted on FixYa by Mojorisin65 some time ago: "Facing the receiver directly behind the MITS logo & power button is a vertical board with a large IC on it, try flexing the board near the IC while turning the reciever on & off or changing input modes, there is a cold solder joint on this board which I haven't found yet. I understand this is a common problem with the MITS M-VR700-900, Onkyo TXDS-575, & Integra DTR5 or DTR5.1 ( all made by Onkyo)."

I gently flexed the board as described, and Boom, all audio was back as it should be. I suspect Mojorisin65 is correct about the cold solder joints, but with SMT components,it could be very difficult to find. It may very well be on one or more of the 48 pins on the large IC. This IC gets rather warm during operation, which may explain why some units work until it heats up. The chip gets warm and 'twists' enough to lift the bad pin(s). In an attempt to deal with this symptom, I superglued a TO-220 heat sink to the top of the IC (don't let it touch the case of C-716). The heat sink is dissipating a fair bit of heat,and so far, this 'fix' seems to be doing the trick. RJD 10.18.11

Posted on Oct 19, 2011

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Facing the receiver directly behind the MITS logo & power button is a vertical board with a large IC on it, try flexing the board near the IC while turning the reciever on & off or changing input modes, there is a cold solder joint on this board which I haven't found yet. I understand this is a common problem with the MITS M-VR700-900, Onkyo TXDS-575, & Integra DTR5 or DTR5.1 ( all made by Onkyo). If this helps would consider sending me a copy of the owners manual ?

Posted on May 25, 2009

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Would you still have this Mitsubishi receiver? I am trying to find someone whoo has a owner's manual and remote they are looking to sell.
Thanks'
Eddie

Posted on May 04, 2008

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Can you be more specific on what IC/Transitors to check?

Posted on May 03, 2008

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  • 13 Answers

It seems to me that u have an output problem. ckeck the output components (either IC or transistor)and change them. good luck

Posted on Dec 21, 2006

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