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Hi there!
I just received a Beoventer 1800 bought "un-tested" and started "testing" it :) Like most untested items, it needs repairs.
Plugged it, FM runs fine but I started smelling like something is burning after 30 seconds, so I turned it of. Took the top off and noticed the transformer was very very hot (hard to touch after only about 30 seconds running).
The smell also seems to come from that area. I am afraid of keeping it on further time because something might catch fire, but my question is:
How hot can a transformer run on these old receivers? What could I try to check first?
All help is welcome, many thanks!
Check the idle current settings.But only power up very briefly! Only just enough to take one reading at a time.
Martin
I noticed this:
Could the transformer be physically damaged?
I still do not have the service manual, where could I test voltages?
I really would.love to repair this amp...
Yes, that transformer needs replacing.Perhaps the record deck stood on it. It can happen if you're not careful when (dis-)mounting it.
Don't power the Beocenter up again before it has been replaced.
I do not know if it got loose on the delivery, but the transformer had lost the bolts that hold it to the chassis and came running on the record deck.
Now I really do not know where will I find a replacement :( not many B&O here in Portugal...
I do not know if it got loose on the delivery, but the transformer had lost the bolts that hold it to the chassis and came rubbing on the record deck.
Beoparts is always a good place to ask for parts for vintage B&O audio products. I'm sure I can find one in the dungeons.
Ok.. I would be pretty much interested!!!
Found this:
You have PM.
Perfect! :) Lets see If I can fix this wonderful B&O
Funny thing - I just had a restoration project of a BC1800 and it had the bolts missing too.I believe that's because it's so hard to figure out how to open the unit if you don't have the service manual. Someone had obviously been messing around there before me and removed every screw, hoping that would help to open it :)
Luckily, the transformer was not damaged in the delivery, only small scratch marks on that same spot.
Got the new transformer installed and it cured all problems!
Now for the next problem: the turntable motor was stuck, I removed it, opened up and cleaned / oiled all moving parts.
Re-assembled it and now it works and spins, but.... slightly slow! :(
If I let it playing for 30 minutes or so it gets up to regular speed, so... what could the problem be? The oil I used would be too thick? Ae any other problematic parts? This is the AC version so I do not see much to adjust besides the motor itself...
Any help would be very helpfull!
Wrong oil and wrong lubricating method.Keep in mind that these are sinter bearings. When the motor is running oil is pulled from the pores in the metal by capillary action.Any oil added from "outside" (the conventional way) will be in the way and pressed away rather fast.You will have to clean out the old oil from the bearings = acetone bath, and let airdry.Then submerge the bearings in spindle oil with the right additives for sinter bearings and draw a vacuum until bubbling stops (6-24 hours).
Google Oilite bearings - it's interesting reading.
Hi Martin,
what particular oil would you use with Beogram bearings? There is a variety of opinions around.
Tero
I have used Mobil Velocite 6 with good results.