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Beocord 2000 Type 2923 No Audio. Only Buzzing

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Toaster
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Toaster Posted: Sat, Mar 23 2019 12:00 AM

Hi,

I have a Beocord 2000 Type 2923 that emits a buzz whether a cassette is playing or not. When playing, the meter sits only a -2db.

The sound changes when I touch different grounded parts of the player, so I'm thinking this might be a grounding issue?

I've touched up a few questionable solder points no success. I've also noticed if I touch around R110 or IC10 (MC1458CP amplifier) I can get the meter to increase to 0db.

If anyone is aware of common issues with this model, please let me know. Thank you for your time!

Dillen
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Dillen replied on Sat, Mar 23 2019 6:58 AM

Check the 8Vref voltage. If down replace the related capacitors on the Dolby board.
Also check 1IC7 (TL072CP). It's a known troublemaker.

Martin

Toaster
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Toaster replied on Sun, Mar 24 2019 10:04 PM

Thank you for your reply Martin. Looks like the culprit might be C208 and C408 (10v 220uf). Going to replace these and hope I get audio.

Toaster
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Toaster replied on Wed, Mar 27 2019 10:19 PM

I replaced C208 and C408 and I now have audio! Thank you so much!

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