Beocenter 1800 - transformer runs very hot

18 replies
A(
Offline
Almiscarado (archived2)
Bronze
Posted December 23, 2020 at 23:12 GMT
#2256250

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!

DI
Offline
Dillen
BronzeModeratorFounder
Posted December 24, 2020 at 06:59 GMT
#2256251

Check the idle current settings.
But only power up very briefly! Only just enough to take one reading at a time.

Martin

A(
Offline
Almiscarado (archived2)
Bronze
Posted December 24, 2020 at 10:41 GMT
#2256252

I noticed this:

 

link

 

Could the transformer be physically damaged?

 

A(
Offline
Almiscarado (archived2)
Bronze
Posted December 24, 2020 at 10:42 GMT
#2256253

I still do not have the service manual, where could I test voltages?

I really would.love to repair this amp...

DI
Offline
Dillen
BronzeModeratorFounder
Posted December 24, 2020 at 11:02 GMT
#2256254

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.

Martin

A(
Offline
Almiscarado (archived2)
Bronze
Posted December 24, 2020 at 12:09 GMT
#2256255

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...

A(
Offline
Almiscarado (archived2)
Bronze
Posted December 24, 2020 at 12:09 GMT
#2256256

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.

Now I really do not know where will I find a replacement :( not many B&O here in Portugal...

DI
Offline
Dillen
BronzeModeratorFounder
Posted December 24, 2020 at 13:02 GMT
#2256257

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.

Martin

A(
Offline
Almiscarado (archived2)
Bronze
Posted December 24, 2020 at 14:16 GMT
#2256258

Ok.. I would be pretty much interested!!!

A(
Offline
Almiscarado (archived2)
Bronze
Posted December 24, 2020 at 14:16 GMT
#2256259

Ok.. I would be pretty much interested!!!

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