BeoLab 8000 not working

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gvidal Posted: Wed, Apr 1 2015 4:57 AM

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Another Newbie to Beoworld here,

I have BeoLab 8000 type 6803 with no sound.  I checked the power supply and found I was missing the -50 volts. I found that the relay (RL1) is not working.  I took the relay out to test it and it works.  Also I check the voltage on the traces while the relay was out and had 25 volts.  However when I put the relay back in the voltage was gone.  I then unplugged P3 and checked the voltage on the cable connector and it was there.  I also bypassed the relay and the -50v appeared but still had no sound.  As stated, I am new at speaker repair.  I've always just had old cheapo's but now if I can get these working I think I will have a great pair.  Any help would be greatly appreciated.

Thanks,

gvidal 

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Dillen replied on Wed, Apr 1 2015 7:29 AM

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Welcome to Beoworld !

Beolab 8000 has a problem with the foam material sitting around the amplifier board. It eats away at the copper traces
on the board. I have seen a couple of cases similar to yours and it seems to affect the relay connections first, check the
copper traces running under the foam.

Martin