Beocord 4500 - no sound

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McGruse Posted: Sat, Dec 16 2017 3:22 PM

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Hi there.

My Beocord 4500 is mechanically working fine, but it doesn´t deliver any sound. The VU-meter though lights up all the way, when pressing play, and keeps on shining steady, even without any tape loaded.

Anyone with an idea of what is wrong?

Regards

/Sven

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Dillen replied on Sat, Dec 16 2017 9:43 PM

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Missing 8Vref voltage.
Usually one or both of the 470uF/10V caps C217 / C417 has shorted.

Martin

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McGruse replied on Sun, Dec 17 2017 12:52 PM

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Thanks Martin. I´ll replace them.

/Sven

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McGruse replied on Sun, Dec 17 2017 1:47 PM

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IMG_1681.JPG

Hi again.

How come the two aren´t the same on the PCB as they seem to be in the service manual? I don´t have the component list, only the scheme. 

/Sven

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Dillen replied on Sun, Dec 17 2017 2:39 PM

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Probably a typo on the board.
C417 is the correct one.

Martin

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McGruse replied on Sun, Dec 17 2017 4:37 PM

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That did the trick. C417 was shorted. Now it´s working fine.

Great thanks Martin. You´re the best!

/Sven