My Beogram 4002's transformer is bit noisy

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Z(
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Zoff (archived2)
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Posted January 25, 2015 at 08:54 GMT
#2249641

Hello everyone,

A year ago I found a beogram 4002 in bad shape, I got it repaired by a pro, a vintage hifi specialist and he got it working again. But since then there is a sort of vibration noise I can hear as soon as the turntable is plugged in. It appears to come from the transformer, while opening the table I touched it and felt the same vibration as the noise. The transformer is still tightly fixed on the body of the table, it doesn't move at all and does not seem to get hotter after a few hours plugged in. The noise depends on what type of material it stands on  it make a lot more noise on a wooden table and lot less when it on metal.

So I wonder, does it mean that the transformer is dying, or will soon be ? If it's not that bad, do you think I can reduce the noise by adding some anti-vibration "feet" on the turntable ? Or some anti-noise thing between the table and the thing it stands on?

Thank you all for your help and advice

Z(
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Zoff (archived2)
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Posted January 26, 2015 at 14:03 GMT
#2249642

Or I'll be happy to buy another transformer to replace mine.
The tunrtable is a Beogram 4002 Type 5521 

Thks

premiumverum
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premiumverum
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Posted February 9, 2015 at 19:22 GMT
#2249643

Where are you located and what is the mains voltage there?

Here in the Netherlands AC power used to be 220V, is now around 230V. Setting humming transformers to 240V sometimes cures these kind of problems, because 230 is sometimes to much for a 220V trafo. Maybe the same applies in your area.

The voltage selector is probably on the back of your turntable. First make sure of the mains voltage, if the setting on your beogram is incorrect unplug turntable and change the selector switch to the right setting.

Location: Netherlands

Z(
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Zoff (archived2)
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Posted February 11, 2015 at 09:01 GMT
#2249644

Hello, I'm in France. And if I believe what I read on Wikipedia the tension is 230 V just like in the Netherlands. May be you're right I'ld like to try your way but I cannot find any voltage selector at the back of the turntable. I can't remember having seen such a thing inside it either. I must have missed it. Anyone knows where it is ?

 

C(
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chartz (archived2)
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Posted February 11, 2015 at 11:46 GMT
#2249645
It is underneath. And I can confirm that switching over to 240 V led to complete silence for my 4002.
Z(
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Zoff (archived2)
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Posted February 11, 2015 at 11:59 GMT
#2249646

Well…
It wasn't exactly on 240 but close. I moved to it closer and the vibration kept on, so I tried to put it on 220V, but now it doesn't vibrates and neither it works…
I made a mistake right ? I guess now the PCU at least is dead, isn't it ?

Z(
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Zoff (archived2)
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Posted February 11, 2015 at 12:11 GMT
#2249647

Sorry for the previous message it is so badly written I don't think it's even understandable, so let me try another time : 

The selector wasn't exactly on 240V but a bit before the mark. I moved it closer and it went a bit further, too much I guessed so I took it back and the vibration kept on, so I tried to put it on 220V, but when I plugged it back it didn't vibrate and neither did it work… 

So I guess I made a mistake and now the PCU –at least– is dead, isn't it ? 

C(
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chartz (archived2)
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Posted February 11, 2015 at 12:12 GMT
#2249648

Those silver contacts get easily corroded. Turn it back and forth a few times (deck unplugged).

However, if you did what you did while the deck was still plugged, you blew the fuse!

Z(
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Zoff (archived2)
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Posted February 11, 2015 at 12:25 GMT
#2249649

Yeah, I think I did. The first time I tried, I unplugged it but when I saw it didn't work I try one more time and I think I stupidly did it while plugged in… 😳
Are those fuse hard to find ?  
Anyway, the voltage selector wasn't the problem because it still vibrated on 240v.

I found on the net someone selling a Beogram 4002 type 5524 PCU, would it work on mine ? It looks the same…
Mine is a 5521 and one the diagram I found on the web, it's mentioned that type 5525 is the same. The seller tells me that it should work as they were build the same year… What do you think ?

C(
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chartz (archived2)
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Posted February 11, 2015 at 13:03 GMT
#2249650

The fuses are inside the deck. Slide the wooden plinth towards you, then, take the platter out, the alu plate around it will be free to be lifted.

Perhaps the selector was stuck on 220 V and you did not really try 240 V. Did you play the selector as I told you to do?

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