Crackling pop from speaker channel L1 and L2 on Beomaster 4500

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jensnilsson76 Posted: Sun, Feb 6 2022 10:46 PM

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Hello guys,

First time poster, but long time forum reader and enthusiast. I apologize if this has been answered before. I tried the search engine on the forum but couldn't find anything matching my issue.

Earlier today I pulled the trigger on a childhood dream of mine. A Beomaster 4500, Beogram CD 4500 and Beocord 4500. The system came complete with a pair of Beovox RL 60.2 speakers, the Beolink 1000 and all the manuals.

Me and the seller sent a few messages back and forth and hammered out a deal. When I was about to go and pick it up he sent me a text stating he might have done something to the amplifier when disconnecting and connecting everything in a different location. Speaker output for L1 and L2 wasn't working anymore. He had sent me a video of everything working before, so I do trust him something did happen. I just can't figure out what, though, and I hope you guys may be able to shed some light. I've been googling all evening but have come up short.

So, the speakers connect through standard Din-2 connectors with the round (+) and flat (-) connectors to the Beomaster. The previous owner figured he might have connected +/- the wrong way, but that shouldn't really matter for anything but phasing possibly. Right?

When I connect the speakers to R1 and R2 everything seems to work just fine. See this video I recorded earlier this evening: https://www.youtube.com/watch?v=wWOcH0qq9FQ

When I connect either of the speakers (or both) to L1 and/or L2 the system powers on briefly but then I get this popping/crackling noise and the amplifier and CD turns off. See this video I recorded earlier this evening: https://www.youtube.com/watch?v=dVVU9HSZVFk

(PLEASE BEWARE OF NOISE IF USING HEADPHONES!)

I've read a few topics regarding faulty speaker relays but from what I've read I don't think this is related to the speaker relays.

I have some rudimentary knowledge of electronics, like measuring voltages and identifying broken components, but I figured I'd ask before opening the unit up for inspection.

All and any help and suggestions are highly appreciated.

Thanks in advance,

Jens

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jensnilsson76 replied on Thu, Feb 10 2022 9:17 PM

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Hey everyone,

Is there anythng I can add or modify to my post to make it easier for the forum users to advice me on a starting point here? I could of course take it to a repair shop, but I was hoping to get some hints on what the issue might be.

Thanks,

Jens