Beolab penta 3, loud pop [Solved]

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Raven_mike Posted: Sat, Jan 30 2021 10:06 AM

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Hi,

This is my first post in this forum. I hope someone might be able to help me.😊

I’ve got a pair of great beolab penta mk3. The sound is awesome! Only issue i have is that there is a loud ”bang” whenever i change the source input and when i power off. 

Anyone have the same problem and what might be done? Recaping? 

thanks for you help! 

Mike

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Keith replied on Tue, Feb 9 2021 9:33 PM

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Having exactly the same problem.  Would love to get some advices from the forum.

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Raven_mike replied on Mon, Apr 26 2021 7:13 PM

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Problem solved! 

After a full recap and changing the TR 23,28 on the main board and still having the penta pop i focused on the inputboard and transformer.

i Changed the 10000uf caps on the tranformer, not sure this was needed but did it anyway.. Then i changed the IC1 and IC2 on the inputboard (PCB 22) after putting everything together the” pop” was gone! My best guess is that the issue was a faulty IC on the PCB 22. 

Hope this might help someone with the same problem! 

/Mike