MS 6000 – Default volume high and buzz from audio

[Shun]

Hi,

I picked up a B&O MS 6000 CRT TV (https://www.beoworld.org/prod_details.asp?pid=630) last year and it’s been working fine but I have a few audio annoyances with it. Firstly, whenever I turn the TV on, it always defaults to a volume level of 42, which is pretty loud. So I always have to turn it back down to a reasonable level. I’ve tried using the store button on the Beolink 1000 remote but this doesn’t store the setting. Is there a battery in these TVs that helps store the setting?

Also the other issue is that I am getting a buzzing sound from the speakers, even if there is nothing connected to the TV. The buzzing gets louder, the louder the volume is. Is this and issue with capacitors on the chassis or something? Have tried a few Google searches but couldn’t find anything. Was hoping someone on here might be able to help me

[pepps]

Hello,

Just a guess, but with B&O audio systems from the 90s the store action has always been ‘sound’, (adjust), ‘store’ ‘store’.

Not just one hit of the store button but two.

Julian

[Shun]

pepps wrote:

Hello, Just a guess, but with B&O audio systems from the 90s the store action has always been ‘sound’, (adjust), ‘store’ ‘store’. Not just one hit of the store button but two. Julian

Thanks. I gave that a try. Pressed Sound, then adjusted the to something sensible like 14. Pressed store twice. After the first press the on screen sound level disappears then pressing it again does appear to do anything. Turned the TV off and then on again and the volume was back at 42 :(. Tried several times with the same result.

[Guy]

According to the manual you store the sound level in the SOUND menu. Set the volume you require and then press GO (or PLAY, using BL1000).

EDIT: If you have a very old BL1000 remote it may not have a MENU button. If so, press SHIFT then TEXT to get MENU, then use up/down arrows to navigate.

[Die_Bogener]

The MS6000 has a small lithium Battery (CR2450) inside the CPU unit.

It must have 3V minimum.

There are different software versions on the MS6000.

Store-Sound-Store …

Sound Menu: Store…

[Shun]

Guy wrote:

According to the manual you store the sound level in the SOUND menu. Set the volume you require and then press GO (or PLAY, using BL1000). EDIT: If you have a very old BL1000 remote it may not have a MENU button. If so, press SHIFT then TEXT to get MENU, then use up/down arrows to navigate.

Thanks, I’ve just tried that and had the same result after turning the Tv off and then on again. Volume defaults to 42 🙁

[Shun]

Die_Bogener wrote:

The MS6000 has a small lithium Battery (CR2450) inside the CPU unit. It must have 3V minimum. There are different software versions on the MS6000. Store-Sound-Store … Sound Menu: Store…

That sounds promising. Do you know where the CPU unit is? I assume it’s somewhere on the chassis of the TV? If so, do you know which board (I assume these TVs have more than one board in the back of them).

I’m quite happy to take the back of the TV off if necessary as I’ve discharged arcade monitors in the past, so quite aware of the high voltages involved.

[Die_Bogener]

It’s inside this metal box.

 

[Shun]

Die_Bogener wrote:

It’s inside this metal box.

Great thanks! Looking online, I can see that when opening one of these CRTs there are two green boards on the left and right of a brown board that some people mod to add a service button to. Is that metal box on the “back” of the main brown board, so it would have to be completely removed to work on it? I assume that, that metal box is solder in place or is it folded metal tabs. It looks like it might be a bit of a pain to remove the metal box lid to get at the battery.

[Die_Bogener]

There are 2 snaps on the top, there is no need to remove it complete…

First remove the top.

Then you have access to the lithium cell.

Measure it. It must have 3V, not less… + is top of the batterie, – is ground of the box.

If less, ok, dismount the box complete. You have to replace the cell.

If 3V is ok, just close it and assemble it.

But 30 years of time… no lithium cell will last much longer.

[Author]

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