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This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
As posted in a previous post. One of my Beolabs died. Was playing, Switched if off and came to find it dead. It doesn't seem to be the fuses, so it must be the standby transformer.
Now the problem is that B&O SA refuse to sell me the part. Want me to ship the entire speaker to the other side of the country for it to be repaired. The cost of transport plus repair would be very expensive.
Do I have any other alternative. Is there anyway I can get a transformer? I am able to change it myself. No repairers in my city will go near anything B&O even though its not really a complicated job, They won't even test it for me.
So if anyone has any suggestions, I'd greatly appreciate it.
P.s. I did contact a B&O dealership in Islington UK but I received no response.
You are not alone Bensa, I need a standby transformer for my BL4000, and B&O Mexico wont sell it to me, they sell equipment not spare parts, they tell me.
Collecting Vintage B&O is not a hobby, its a lifestyle.
Do you have a part number? I'll have a look into it
If you think nobody cares, try missing a couple of payments.
For my BL 4000 it is the 1T1 part number 8013582, speaker is type 6638, Ser. No. 16138538, I cant give you Bensa´s as I dont know the type and V in SA
Regards Søren
SA uses the same voltage as the UK. 240v.
So its a T2 on the board and on the part it says 8013473.
Your help would be greatly appreciated!!!!
Ben
Great. I'll make some enquires tomorrow (Monday) and report back
There is hope Ben, and Stonk I will kiss your feet if you can help
Before you go to all the cost and hassle of replacing the transformer(BL8000)have a close look at the pcb lower section.I've had a couple of BL8000's with hairline cracks in the printed circuit,resulting in completely dead units.I don't know about the BL4000,praps a different board?
Nick
The BL 4000 PCB1 is different, and 1 primary coil on the standby TR is open circuit.
solderon29: Before you go to all the cost and hassle of replacing the transformer(BL8000)have a close look at the pcb lower section.I've had a couple of BL8000's with hairline cracks in the printed circuit,resulting in completely dead units.I don't know about the BL4000,praps a different board? Nick
Now I am concerned about what you have said. When I opened the unit a lot of the foam and perished and was piled up at the bottom covering the board. The rotted foam is very sticky and has seemed to have caused some damage to the board. I'm not sure if this is part of the problem. Please see photo.......do I need to repair this and if so, how on earth do you do that!!!
Well that looks like it could be the problem, it looks like there's two tracks that have shorted out on the board. I'll await someone's tech response before I source a new one for you as it might well be repairable by soldering a couple of wires at the start and finishing points of the damaged tracks on the board. Bypassing them if you will.
Nick (solderon) really knows his stuff so I hope he inputs further.
Stonk: If you can provide a Standby Transformer for my BL 4000, please mail or PM me.
It looks like there are two traces running parallel in that area on the bottom edge of the board. Are those big spots solder? If so, could be creating a short circuit.
Beo4 'til I die!
Søren Mexico: Stonk: If you can provide a Standby Transformer for my BL 4000, please mail or PM me.
Will if I can!
Its not solder spots. I am the first person to open the speakers since they left the factory. There are no solder spots at all. The foam was collected against that part of the board. Its almost as if the traces swelled? They have also oxidised in places...ie..gone green. The pic was after I actually cleaned them. I can bypass the tracks by using wires but will that stop the short or will I have to make sure that the tracks are removed in that section? I'm not sure exactly what to do ( as usual lol!!) So if anyone can steer me in the right direction that would be great!
Thanks for everyone's input so far.
Clean again with a not too soft brush and mineral spirit, check the tracks, solder point to solder point with an Ohm meter, check with same for shorts between tracks, solder points at both ends of tracks. If shorts are there, scrape off with small sharp tool, if not visible, check with magnifier.
When everything is clean, seal the the PCB in the affected area with clear nail polish, then check again for shorts, and solder in your bridge wires.
I am curious, are you living in a high humidity place ? If you have green oxidation and a s/c it must be possible with Sorens suggestion to find it. However the s/c may have caused other damage.
I cleaned the board and I was mistaken. There is solder on those tracks. At no point do the tracks or solder touch each other. I then soldered a wire between the points as suggested but the Beolab is still dead.
I live in Durban which is on the Coast of SA and is extremely humid in summer. I am quite near the beach. All I can think now that it must be the standby transformer! So complicated all this lol!
Soren I'll give it a good clean as suggested. I've left the bridge wires on. Unfortunately although I have a multimeter I haven't really used it so I wouldn't know how to check for shorts.
BenSA: Soren I'll give it a good clean as suggested. I've left the bridge wires on. Unfortunately although I have a multimeter I haven't really used it so I wouldn't know how to check for shorts.
Can you post a better pic of the board after cleaning, and a pic of your multimeter, I will try to make a step by step instruction.
I don't think the black goo is conductive.In the examples I've seen,the print just cracks.The two tracks along the edge of the board are the connectors to the standby relay coil.Just cut the tracks with a craft knife at both ends,so that the dodgy bit is completely disconnected,then run two new wires between the relay and where the tracks originate.Make sure you connect point to point so that the relay is in the correct polarity.
I think if the outer casework of the speaker is continually heated by sunlight,the sealer inside decomposes to goo,with the effect you see here.
Regards,
Thanks for the fanmail btw Stonk!
Ok....FINALLY some concrete feedback. My friend was taking his tv to be repaired and I tagged along and brought the amp section of the Beolab with me. They kindly tested the standby transformer for me and it is in dead!! So basically a new transformer is what I need!
Thank you to everyone though who took such interest in my problem in true Beoworld style! Very greatful! Now I just need a replacement transformer!
Another update. I phoned B&O SA and really got on their case about not being to order the part. Eventually they caved and I've ordered the part! Not the cheapest at R945.00 which is about 73 pounds. Of course no stock so I'll have to wait. By the way the new part number for the transformer is 80137007. Hopefully all my problems are now solved!!
I hope so too, but it might be worth investigating the other speaker to prevent it going the same way. Glad B and O SA helping.
Steve got one for my 4000, a lot cheaper, did you order by B&O already ? if not try Steve and check the shipping costs to SA.
Big hug and thank you to Steve (Stonk).
Søren Mexico:Big hug and thank you to Steve (Stonk).
My standby transformer is now, thanks to Steve, waiting in DK for transport to Mexico