Beogram CD50 - starts with no sound

11 replies
W(
Offline
wirralsimon (archived)
Bronze
Posted October 6, 2008 at 04:40 GMT
#1855830

I have an unusual problem on my Beogram CD50.

When it starts playing there is no sound. After about 3 minutes there is some sound but it is incredibly distorted. If I wait another 30 seconds or so the distortion disappears and it works perfectly.

This only happens when it has been on standby for a while, if it has only been put on standby for a few mins it still works fine.

I am pretty sure it is not the Beomaster as the problem does not happen with other sources.

 Any ideas?

 Simon

DI
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Die_Bogener
Bronze
Posted October 6, 2008 at 05:40 GMT
#1855831

Yes... classic defect of capacitors in the sound line. Change caps... sorry, i dont have the part numbers available. 

Look for green/black/dusty/dirty wires on the caps or brown liquid on the caps.

Keith Saunders
Offline
Keith Saunders
BronzeFounder
Posted October 6, 2008 at 07:26 GMT
#1855832

Simon,

Whilst Die_Bogener may well be correct about the one or two capacitors being at fault as they smooth the + & - 15 volts for the operation amplifiers and given the symptoms you have described does support the case.

However before you pull everything apart you may wish to connect the output (left & right) to another amplifier or headphones to be sure.

Location: Hampshire, England

W(
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wirralsimon (archived)
Bronze
Posted October 6, 2008 at 17:37 GMT
#1855833

Thanks for the replies, it does look as if capacitors are the likely culprit.

 One thing I am sure of is that if I attempted the repair myself   I would probably make things worse! Could anyone recommend a repairer based in the North West of  England who could do the work for me?

 

Thanks again

 

Simon

K(
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KingStreet (archived)
Bronze
Posted October 7, 2008 at 07:30 GMT
#1855834

Simon,

 
Our audio bench guy has c35 years of Beorepairing experience, so would be OK with this.....PM or call the shop...or just bring it in.

Regards

David

DI
Offline
Dillen
BronzeModeratorFounder
Posted October 7, 2008 at 07:51 GMT
#1855835

I agree with Die_Bogener. There's a group of caps near the power supply area. If bad, they will affect the muting circuit etc. and the symptoms you describe is typical of marginal caps "warming up". It will only get worse with time.

Replace the lot and check for cracked solders around the voltage regulators etc. 

Martin

W(
Offline
wirralsimon (archived)
Bronze
Posted October 7, 2008 at 10:07 GMT
#1855836

Thanks David and Martin!

I will be in touch with David shortly.

 

Simon

W(
Offline
wirralsimon (archived)
Bronze
Posted April 3, 2009 at 15:09 GMT
#1855837

I finally got around to taking it to King Street and my CD50 is now back with around half a dozen capacitors replaced and with the loading mechanism etc. given a thorough overhaul, and it is working better than ever.

 

Simon

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Xseries (archived)
Bronze
Posted April 3, 2009 at 18:22 GMT
#1855838

Thanks for the update - it is good to know that there is still life in these excellent CD players!

😐

Brian

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ouverture (archived)
Bronze
Posted April 4, 2009 at 11:30 GMT
#1855839

they are one of the best CD players around, my CD50 was playing up before Xmas, and I got it serviced by Tim and it sounds really good again.

combined with the Beomaster 5500 and some good speakers, CD's sound warm and natural, very similar to vinyl on a good turntable like the Beogram 4000 😁

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