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This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022

 

Beolab 8000 damping foams

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tournedos
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tournedos Posted: Sun, Apr 8 2018 12:25 PM
So one of my BL8000’s packed up last fall, and now I finally had time to tackle it. Obvious problem, foams turned to goo, but thankfully apparently no real damage yet. What a thoroughly disgusting job though!

The question is, do I bother installing new foams? These will never be played particularly loud.

--mika

Dante
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Dante replied on Sun, Apr 8 2018 9:14 PM

If you can do it propey, why not?

tournedos
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tournedos replied on Sun, Apr 15 2018 11:58 AM

Well, the speaker is still malfunctioning after cleaning and some resoldering, so it will need more work.

Green light on always and no sound. There is some fault finding advice in the service manual and I'll proceed by that, but does anybody have a better scan of page 18-2 than we have here on site? The component placement pictures are almost illegible and there's no silk screen for the SMD parts on the board.

--mika

tournedos
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tournedos replied on Sun, Apr 15 2018 12:57 PM

Never mind, turned out to be an easy problem. One of the PCB traces leading to the coil of the standby relay was open circuit. Very difficult to see, and it might not even have anything to do with the rotten foams.

Regarding the dilemma with the foams, I decided not to bother. I never heard anything wrong earlier, and the way the original foams were, I could have just as well pushed a couple of old socks down the reflex tube...

Now to select some new fabric, and I can put the stand-in 80.2s with rotten woofers back into storage Smile

PS. it would still be nice to have a legible component layout picture for future.

--mika

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