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Overheating receiver My pioneer VSX-816 receiver overheats and causes one of the speakers to malfunction. The fan inside the component may not be working.

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I opened my receiver up and found the fan not working. So I took the front of the unit off so that I could access the fan. It looked brand new so I don't think it ever worked. I checked the fan connection with a volt meter and found 12 v only the fan still would not run. I took the red wire coming from the fan and put it to ground. Cut the yellow wire off the fan. and the black wire to the middle of the connector on board. there the fan worked. now I have a working fan. maybe this could be your fix just don't lose the screws and remember how this comes apart. I know the fan works not so sure it fixes problem but at least the fan is working so thats a start. At least it won't overheat. hope this helps

Posted on Nov 22, 2009

  • electricgary Dec 03, 2009

    just so everybody knows my problem seems solved no more problems as far as I can tell. I have left my receiver on for hours and hours and the speakers continue to work fine. this does work.



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Does it indicate a problem with the fan? (Page 67)


blinks in the display, then the power automatically switches off.

• Something is obstructing the fan. Remove the obstruction and try switching the receiver back on. If the

fan is still not working, or you can't remove the object, unplug the receiver from the wall and call a Pioneer

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Check for dust balls in and around it. Disconenct power before exploring inside.

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Generally speaking, an amp protects itself from heat, shorts and overloads.

Overloads can be from excessive periods of high output and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

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The output stage circuit of your Pioneer should be checked well to detect this fault. As sound output comes right at first, and it goes of intermittently, distorted and interrupted, there must be some overheating components are there in the audio output state of your set. As you know, there is no one sentence answer to any electronic devices' fault, as they are composed of thousands of components together, by soldering technique. Each and every component in it will and should work properly to what it is desigened to, otherwise fault will occur. There is an overheat protection circuit composed with the audio output section of most hi-watts amps. If this circuit has some trouble with it, the output section components will overheat, shutdown, distorted sound and such faults will occur.
It is very easy to repair a 'dead' set, than this type of faulty set. One have to check each and every component and should detect out the faulty component. It is really a very skilled work, and one must have thorough knoledge in electronics and proper measuring equipements to go up. A very high quality digital multimeter is a must to follow this fault. Moreover, a sound knoledge in following the schematic diagram of the set, which will look entirely different to that of the circuit boards inside.
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