Seems very hard to get to switches also on BM4400 I restored .Fortunately was not necessary in my case

It's like a mechanical issue . Need someone with experience like your tip on take apart the BM1001 .

W.Frankenberg wrote:

I also have an amplifier from another hi-fi manufacturer (from a friend), a Grundig FineArts 903A, which has problems with the volume poti (is a 4-poti and no longer to procure)

 

It's the pot like used on Quad 34 ? 

To quote , just hilight part from message above and then press quote .

Will show in your reply 

Today an old woman take me this receiver/turntable  made by Siemens .

She's more than 80 and would like to hear this Radio again .

Just plugged in. Turntable play and also the Am .In FM just noise ... 

Go for a full restore 

Login to view image

SebaLele wrote:

Today an old woman take me this receiver/turntable  made by Siemens .

She's more than 80 and would like to hear this Radio again .

Sure, the radio is not older than the lady?

You're not doing an April Fool there?

During my apprenticeship I had to reload the scalper ropes on the devices!

These "old sweetheart" usually do not break, only the tubes you have (if you still get some) renew!

Are you a radio and TV technician like me?

SebaLele wrote:

Seems very hard to get to switches also on BM4400 I restored .Fortunately was not necessary in my case

It's like a mechanical issue .

I've had contact with Martin Dillen (admin in this forum) a couple of times, he has almost everything on spare parts from B & O; but unfortunately these buttons are not anymore!

SebaLele wrote:

It's the pot like used on Quad 34 ? 

no, the Grundig is actually a Marantz and the potentiometer of a quad 34 would not fit!

The pot is soldered on a small board with some electronics and is a 4x 50kOhm!

SebaLele wrote:

Seems very hard to get to switches also on BM4400 I restored

Yes, I think the BM4400 has the same buttons as the BM3000!

I have asked Marti from this forum for spare buttons, unfortunately, he has currently no