I had the exact same thing, no sound at all but light on and heatsink slightly warm. Returned amp module to Wharfedale and it was diagnosed as a fault in the muting circuit and repaired under warranty. Asked for a circuit diagram but they don't give them out while the equipment is still in production.
SOURCE: Yamaha YST-SW150 Subwoofer
hi, is it a humming noise ??? check if the connector is plugged in properly,check the earthing, if its a three pin mains plug, if its a two pin, then the CPU SMPShave a proper eathing. let me know
SOURCE: Wharfedale Modus One
The tweeters are probably blown, i had the same problem.
You can test this by placing the cable on the dismanteled crossover at the back of the speaker. colour blue/yellow.
No high volume please.
See http://www.hometheatershack.com/forums/diy-speakers/4549-wharfedale-modus-one-six-crossover-pics.html
for pictures.
If the tweeter is blown it can be dismanteld with the aid of a screwdriver, horizontally.
Place it between the tweeterbowl and the ring which has the mark wharfedale on it. The tweeter comes loose. On second hand sites you can buy little speakers, like modus one or two's with the same tweeters for a good price and put them on your larger speakers.
This how i repaired 2 of my 4 modus eights.
good luck Danny Mol
the netherlands
SOURCE: Wharfedale 10inch cude subwoofer that has a feedback hum when con
Hiya, try a different input cable (from amp to sub) if you have make sure that is ok.
Failing that if there is an earth in the plug, try to disconnect that (earth loop) - unlikely but hey electronics.... anything possible :)
If still there with new cable, earth off etc, then the Yamaha could have a problem but find that difficult to swallow...
Let me know if helps, see any other possibilty
Best of luck
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