Question about Onkyo HT-S780 System

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Onkyo sub-woofer will not power up

Ok, I was able to get a schematic for the skw-530 and the fuse checks to be fine. But the schematic doesn't give me what the voltage coming out of the linear transformer that feeds the ciruit board. There a two resistors that are connected to the transformer that get really really hot. the printed circuit board where the transfor connects does say "AC in". My question is what should be the proper voltage to the circuit board?

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Onkyo subwoofer not working

I fixed my subwoofer. The resistor at R16 (right next to the fuse) was the fried component. I removed it and replaced it with a 13K ohm 5 watt metal oxide resistor (from Mouser Electronics if not available locally). Works fine now. I got the solution and the circuit schematic from an audio hobbiest at diyAudio.com. This is, evidently, a fairly common problem.

Posted on Nov 19, 2007

  • 133 Answers

SOURCE: connected home theatre system but no sound sub woofer

If the system uses a remote control, you may need to adjust the subwoofer out signal setting or turn on the sub in a menu, and on many systems, you can only access those settings via a remote control (you should check the onkyo user manual on how to do it).

Now, this is just one suggestion, it may work, but then again, it may not.

These could also be connection problems or some internal trouble in the onkyo sub signal output section or in the subwoofer input section, but hopefuly, it's just a "turn on" or "signal level" setting in a menu.

Good luck

3rq8 (triarcuate)

Posted on Jul 23, 2009

  • 26 Answers

SOURCE: I need schematics to the subwoofer in this system

Check here to see if this is what you need.

http://www.fixya.com/support/p142531-onkyo_skw_50_speaker/manual-5086

Posted on Nov 19, 2009

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Subwoofer issues


Hi,

The fuse blows when the current that passes through it are beyond its rating. This could be brought about by excessive consumption of the load, in this case the amplifier powering the sub-woofer.

Repairs would involve component level and require that you be familiar with electronic components and circuitry, use of a DVM and a soldering iron. Often it is just the finals that needs to be replaced. Of course we cannot discount the possibility of other components or section such as the power supply.

The smoke indicates something heating up such as a resistor or diode or a capacitor.

Should you be uncomfortable opening the unit and doing a DIY (do-it-yourself), then perhaps you need to seek the services of a qualified professional.

Should the downtime and cost of repair be no longer economically reasonable, purchase of a new unit might save you further trouble.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

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Onkyo subwoofer not working


I fixed my subwoofer. The resistor at R16 (right next to the fuse) was the fried component. I removed it and replaced it with a 13K ohm 5 watt metal oxide resistor (from Mouser Electronics if not available locally). Works fine now. I got the solution and the circuit schematic from an audio hobbiest at diyAudio.com. This is, evidently, a fairly common problem.

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