Beolab 8000 turn off after some hours

[Prime]

I see the IC1 and IC2 in your diagram. But in another scheme Ive seen, they were both called IC1? Do I need to replace both, or only the left one?

[carljh]

That will work. You need a solder blow gun to remove the old one. Be careful to not rip off the solder pads from the PCB.

Location: Stockholm

[carljh]

You only need to change IC1

Location: Stockholm

[Prime]

Left one? 

[carljh]

Yes, that is correct. Good luck!

Location: Stockholm

[Prime]

Removed it. Waiting for the new parts.

 

[Prime]

I installed it. It turns on but the speaker is unusable. A lot of noise is coming from it even when there is nothing plugged in and it only is powered on.

did I miss something?

[carljh]

That was bad news! It looks ok. Strange that you get noise from it because this circuit only control the auto on detection.

Location: Stockholm

[franjo3000]

Hello all, I am new member, and I have a pair of Beolab 8000s with a 11xxxx serial number of which one I believe has the same issue as discussed above:

• when I use it with a Beolink cable, it turns on (and off) just fine
• when I use the LINE in, it works fine for 2-3 hours, and then turns off. It does not turn on again. (only if I change to Beolink..) When I remove the wall plug and wait until the next day, it works fine again for 2-3 hours…

With turning on I mean that the light switches from red to green and it plays music.

I have the disassembled speaker lying on my desk already as I am doing the foam replacement (thanks to this great forum!).

I don’t have electronic testing equipment other than a good multimeter.

Do you think I should be going for the IC1, too? Or any other part to consider?

Thank you!

[marexy]

Usuly at that error there is a problem at one or more caps.

Noice or humm problems are related to bad IC.

Try to change RELE as some times rele is also bad inside.

all the best 🙂

[franjo3000]

what do you mean by RELE?

[KolfMAKER]

I think @marexy means the ‘relay’.

@marexy: which caps do you consider suspicious?

Location: The Netherlands

[carljh]

Hi @franjo3000

Your problem certainly sounds exactly like the same problem I had. I bet you need to change IC1 and this will fix the problem. I used an IC1 chip from an old unit but earlier in the thread is some alternative you can buy. You need a solder blow gun to remove the old IC, be careful to not rip off the solder pads.

Good luck!

Carl

 

Location: Stockholm

[KolfMAKER]

@Carljh

Thanks for this info.

I have a BeoLab 8000 that also has a problem when connected via RCA.

It sometimes does switch on (mostly not), but only when I put the input volume high.

Question

• Could this also be caused by a bad IC1?

Location: The Netherlands

[carljh]

@KolfMAKER

Hard to say but the IC1 belong to the circuit that turn on the amplifier when the input signal reach a threshold level.
It may solve your problem if you swap the IC1.
Carl

Location: Stockholm

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