Re: Subwoofer Power Supply Problem

Avanilla, I'm sorry the caps were Panasonic caps not Mullard. The big black round cylinders are the caps. They are radial caps, that means they have two lead protruding out the bottom. Look on the side of the cap there will be a color bar which forms an arrow near the bottom. That indicates the lead next to it is the negative lead. make sure when you replace the new cap with the same orientation as the old one (note where the old cap arrow/bar is located). Unsolder the old cap use solder wick or a solder sucker. heat up the solder joint and either...

Re: Subwoofer Power Supply Problem

Oh! I also replaced the 2, 2200uf 160V 85 C with 2200uf 160V 105C Panasonic caps as well.

Re: Subwoofer Power Supply Problem

I ordered from DigiKey the Panasonic replacement capacitors the same values as on the P/S board but 105C instead of the 85C caps that was on the board. Although in my case I don't think it was necessary, because one of the 1000 uf cap had a cold solder joint. I think if I re-soldered it, I probly could have more service out of the unit. Since I already replaced 3 other caps, I just went ahead and replaced them all and soldered them with professional solder joints The unit is now working superbly. good luck to you all. May the woofer be with you...

Re: Subwoofer Power Supply Problem

Hey all,
I owned a Onyx ULW-10 since 2005. I really love its performance. unfortunately it just gave up the ghost early this year. I read here that the filter cap in the power supply is prone to self destruction. I want to thank you all for the wonderful insight on this problem, however, my sub-woofer besides the hum it also makes a really bad clunking sound when there is very loud low frequencie in the signal. I would guess it's just the mounting for the woofer pulled out of the mount. I have not open the unit yet, but will be openning it...