Opps it did again !

While was waiting that glue dried I've lie the BM 1001 on the bench to test ...

Still Fm doesn't play ...

different problem from early , now it can received from fm & sometime a station can be hear but :

no tune .. you can play with tuner but not change the station .

If I hear a station from FM the same station is present on FM1, 2& 3.

when a station is locked , it drifts and change station ..

I believe something is loose .. due to a miss or partial contact and should be in common with FM & station preset . Never ending story 

I can hardly believe what you write, since yesterday I have exactly the same behavior with my BM1001!

If you press the AFC button, the tuning will go through the entire FM band, and sometimes FM1, 2, 3 will play the same station, even though they are set to different!

Now I had just completely assembled the device and only had in the test run, so I must probably continue again!

I suspect the error in the AFC circuit (defective tantalum capacitor?).

I'll keep you informed if I found the mistake, but you may be faster!?!

By the way, your woodwork looks good, but you also have every special tool at hand !!

Will the case be black after painting?

ouch ! sharing same defect ! 😉

W.Frankenberg wrote:

If you press the AFC button, the tuning will go through the entire FM band, and sometimes FM1, 2, 3 will play the same station, even though they are set to different!

Seem pushing preset or FM doesn't change result , maybe a common wire/connection in these button ? 

each button should give a different voltage to IF ; seem don't close the loop 

What about at the point I have highlighted ?

Think at point 2 , a partial resistance will read , enough to keep some fm but not enought to have correct level ...

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I will try to look at these 

I did not try pushing afc , but this night when I'll be back from work I'll give a try .

W.Frankenberg wrote:

I'll keep you informed if I found the mistake, but you may be faster!?!

wiil be great , I have 3  amp on the bench with ghost problem ; maybe some help each other will solve .

W.Frankenberg wrote:

By the way, your woodwork looks good, but you also have every special tool at hand !!

Yes , I like to be indipendent (where I can) ,so some years ago to make some plinth , I bought this Bosch table .

From a woodworker the simple thorens 150/160 plinth will cost half the Bosch . Some practice , and voilà ; usually just frame but sometimes some furnishings as well . Just for fun 

Little time , I've done some check .

When switch on the 1001 issue just noise;

then , with a little hit on the switch board start to sing but without tuning .It take some station and after a while change station .

AFC does not change situation . Just receive worse .

So I put a DMM on R47 (47K). The voltage here should change when you tuning .

When I first touch the R47 solder point on side 1 , Voltage change when I turn the tuning pot.

it varies from about 8Volt to 15V .

On the other side R47 (2) : I touch with probe and tuner start to play correctly . . I lift the probe and still no tuning .

For now I've jumped with wire side 2 of R47 and till now everything is working .

But ... I don't believe (but I hope ) this was the fault . But if you think maybe logical.

Gabriele

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exactly, I also have a board error (see picture), the pen points to the interruption of the board, re-soldered and FM is again stable! Unfortunately I only have to perform the FM adjustments again, since then I have a worse stereo signal.
Great tip thanks Gabriele!

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Happy to hear it's working again !

Still mine

I think the power lamp and the plastic strip will be the smallest problem on your BM1001!

As a replacement for the black plastic strip, you can certainly use a pond liner, because I would even have a few leftovers from the pond film.

By the way, your youtube movie was interesting!

What else do you have on "sleeping" projects?

I still have a BM4000 with defective power amplifier and button problems and several Beogram series 59xx, and a BM1200 with a defective power amplifier in the shelf!

Best Regards.

W.Frankenberg wrote:

I think the power lamp and the plastic strip will be the smallest problem on your BM1001!

As a replacement for the black plastic strip, you can certainly use a pond liner, because I would even have a few leftovers from the pond film.

Yes , everything is fine . I was boring to open again to fix these little thing .Now it's closed and it''s playing ; just cosmetic thing .

these B&O are the toys of  last six months ; I've restored a BM 4400 , a BM 901 and Beocenter 2100. Never had one before .

I have some issue with other hifi brand ; nad 306 with thermal drift , some components work at 50/60° and give distorsion .

Another is a sansui d9 ; here the bias goes up and down and take  the final transistors out of safe zone . Bad design . These are from friends .

The beo is giving a good soundtrack while I'm play with electronic .

W.Frankenberg wrote:

I still have a BM4000 with defective power amplifier and button problems and several Beogram series 59xx, and a BM1200 with a defective power amplifier in the shelf!

 

I like the look of 4000 in black  , a lot of power in this little case ; what sort of trouble witth it ?

Yes, the BM 4000 I like better than the BM3000, because of the black Alufront!

My problem with the BM 4000 is mainly in the no longer latching switches for speaker1 and Filter Low.

I have already mentioned the problem here (see /forum/general-discussion-and-questions/bm-4000-problems) but have not received a response so far.

The final stage problem consists mainly in the procurement of some special trasistors, and the replacement of the large  capacitors!

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)

P.S.

I've been writing this forum for a while, but I have not always figured out how to copy and paste quotes from other posts