Beomaster 3000 Idle current in one channel not adjustable

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Andreas Posted: Fri, Jan 17 2020 12:08 AM

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Hello everybody,

I changed the Trimmer and all caps on the board of an Beomaster 3000. All works fine... Sound plays in both channels, but I cant adjust the Idle Current on left side. I measure 20mA and it's not adjustable. The other side is not a problem.

What is the reason for this. Can anyone help me?

Thanks very much

Andreas

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Dillen replied on Fri, Jan 17 2020 6:53 AM

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The resistors close to the trimmer (circuitwise) are known to go high in value.
That often causes situations like this.

Martin

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Andreas replied on Fri, Jan 17 2020 6:26 PM

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Hi Martin, thank you for Tip. I measuer this weekend an post you results.

Have a nice weekend

Andreas

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Andreas replied on Sat, Jan 18 2020 5:53 PM

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Hi Martin, I measured all resistors arround. They look fine. R 482 has 720 instead of 560. The others are in spec.

Another Idea of this issue? Thanks for help

Andreas

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Dillen replied on Sat, Jan 18 2020 6:08 PM

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Replace resistors 480 and 482.

Martin

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Andreas replied on Mon, Jan 20 2020 5:53 PM

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Hi Martin,

replaced and works. Thank you very much. You're great

Andreas