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Hi, I have a B&O beocenter 1800 with a really load hum on the right hand speaker. This occurs on both radio and turntable. I have swapped speakers and cables and hum stays with RHS speaker output

B&O beocenter 1800

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This old timer probably has an output amplifier fault.with a circuit diagram any competent engineer shoulb able to locate the problem with the turntable removed access is easy and so is replacing parts

Posted on Jul 02, 2014

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Posted on Jan 02, 2017

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SOURCE: Sony CMT CP1 Right hand speaker output very noisy, humming, crackling

It sounds to me like you both are having a problem with a capacitor going bad. some capacitors act as a noise filter and it sounds like you both have a bad one. If you are any good with a volt-ohm meter that reads capacitors you should check them to make sure they are at their proper values which will be posted on the capacitor. then replace it. if you dont know how to use a v-o meter then take it to a shop and have them replace it

Posted on Jan 23, 2008

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2 Answers

Beocenter 7007 lights but no power


It is likely the audio output ic has failed, check the speaker wires for shorts, if okay! you will need a professional to take care of this.

Mar 21, 2012 | Bang and Olufsen Beocenter 9300 Shelf...

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Left speaker has developed a hum. Checked connections and all seems well. Sounds raspy like the speaker has blown.


This is likely due to a problem with the amplifier. You may have turned up the amp to the point of overdriving the speaker. The distortion at these high levels cause clipping and turn what was once crisp, clear sound into a muddied, garbled mess.

If the speaker is left connected to that source long enough, damage to the speaker and the amp may occur.

Without changing positions of the speakers: You can disconnect the affect Front or Rear L & R speakers and swap them (connect the L speaker to the R output of the amp and vice-versa). If the buzzing / hum "moves" to the other speaker, then the amplifier has the problem. If the buzzing / hum stays with the same speaker, the speaker has issues and is likely "blown".

Either way, it is probably not going to be a "cheap fix"

Good luck!

Jun 24, 2010 | Boston Acoustics VRS Micro Speaker

1 Answer

One of my numark turntables tt 500 the left channel does not work. i only hear the music on 1 speaker. doe you know what to do?


Swap the channel cables from the turntable left to right to see if it follows a channel from the turntable or the same speaker is dead. If it swaps with the cable, then look for a break in the wire to the pickup on the tone arm. If the dead speaker remains the same, you have a problem in that side of the amp or the phono preamp.

Jan 10, 2010 | Numark TT500 Turntable

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B & O Beocenter 4600: The record player won't spin


the turntable wont spin unless a record is on the platter,the centre 45 adapter weighs the record to determine 33/45.try pressing 33 and turning the platter by hand(remove expensive cartridge first!),if it starts to spin the motor leaf switch is at fault.is the belt in position.the motor pulley can become unglued.

Jan 08, 2010 | Bang and Olufsen Beocenter 9300 Shelf...

1 Answer

Technics SL-L3 turntable no sound until warm up


either the cartridge is bad in the phonograph tone arm.  Or the pre-amp in the stereo is bad...remember that the turntable is the only accessory that uses the pre-amp input on the stereo.  I'm betting the pre-amp is bad.

Mar 10, 2009 | Technics SL-1210 Turntable

1 Answer

Low Volume from right speaker of entertainment center - turntable only


Hi There thanks for your very good desctiption of the problem it really helps to have a lot of detail...

There are Mono and stereo types of stylis cartridges and it sounds like you have a mono equipped into a stereo amplifier..

If there are 4 small coloured wires visible under the stylis then
its a stereo stylis and should work, have a close look and maybe one of the small wires has dropped of the small pins on the back opf the stylis cartridge.

If there only two wires visible then its a mono cartridge and this is why you only have sound from one channel..

So answer is wires dropped of the stylis.
or
Wrong type of stylis cartridge.
or
if there are four wires and thay all look connected then perhaps the stylis is faulty and you need to replace it...

Cheers from YU BEUT

Feb 02, 2008 | Audio Players & Recorders

1 Answer

No Sound out of Left side


is it possible to swap the left and right wires on the needle cartridge? does the sound change sides? if yes bad cartridge if you still only get sound from right side try changing around the rca phono plugs

Jan 04, 2008 | Technics SL-BD22 Turntable

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