Electronics > Repair

B&W Subwoofer Amp Repair - identify SMD resistors

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MetalToby:
Hi all,
I have a dead B&W ASW610XP Subwoofer. Original plan was to just sell the driver and not attempt to repair it. However while stripping it I found some burnt SMD resistors on the power amp board. They are quite large so I think I can replace them, but reading the numbers is difficult (see image). I think they say R280, but what do you guys think?

I guess these resistors don't go bad like that for no reason. The second image is the other side of the board and I notice there are some MOSFETs close by. Might they be the root cause? From what I've read they do fail. I've read about testing them with a multimeter, do they need to be removed before testing? Or can they be tested in situ?

I'm not an electronics engineer, just a curious guy having a go. I am happy to replace a few components, but that is as far as my knowledge goes. No big deal if I cant get it working.
Any advice appreciated.
Many thanks

beatman:
looks like R820.check all suround components for short.

DavidAlfa:
Mosfets can easily be checked without removal, check there're no pins shorted.

Large picture, could be useful:

http://bilder.hifi-forum.de/max/607287/asw-10cm-s1-asw-10cm-s2-asw610-xp_1169032.jpg

MetalToby:
Thanks for the replies.
@DavidAlfa that image is exactly what I have. A couple of the MOSFETS in the top left corner are shorted between any combination of pins, so I will add them to my shopping list. Those MOSFETS are close to the burnt resistors on the back, so maybe they are the cause of the failures.

DavidAlfa:
It's really seems like R820, so 0.82Ohm.

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