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This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022

 

Loss of one channel - Beomaster 3000

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This post has 6 Replies | 2 Followers

Danny Wells
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Danny Wells Posted: Tue, Apr 3 2012 9:22 PM

I have just purchased a Beomaster 3000 in mint condition cosmetically. The seller advised me that there was no sound on one channel - any ideas as to what I should be looking at as  probable causes?

 

Evan
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Evan replied on Wed, Apr 4 2012 1:39 AM

Could be one of many or a combination of things. There are capacitors, resistors, diodes and transistors that could be at fault.

The general consensus is that if you go into an amp like the 3000 to fix something, you should refresh it by replacing the aforementioned items all at once. 

Beo4 'til I die!

Peter
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Peter replied on Wed, Apr 4 2012 6:20 AM

Which 3000? Have you checked to see if speaker 2 works - If it is a later touch sensitive model, sometimes it could be a mute relay. That does not affect speaker 2.

Peter

Dillen
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Dillen replied on Wed, Apr 4 2012 6:21 AM

Welcome to Beoworld !

Which type of Beomaster 3000 do you have ?

Martin

Dillen
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Dillen replied on Thu, Apr 5 2012 9:06 AM

OP did a reply on the “Beoworld Update Message” rather than reply to the thread; here the contents:

Hi Dillen,
 
The unit that has lost one channel is an early 1970s Beomaster 3000. I am not electronically minded but will check out the 'speaker II' outputs, test the 'balance' slider and other more obvious possibilities. I have a couple of 3000/3000-2 units that I purchased as 'donor' items in case I ever need to provide spare parts for a repair job which may be the case here.
 
I am a long-standing B & O fan - I have a mint 3000-2 that I purchased new in 1973, a mint Beomaster 4000 currently coupled to a Linn Sondek LP12/SME3009/Shure V15V turntable set-up and a complete four component 6500 system with its original MMC2 cartridge, controlled via an MCP, again purchased brand new and in mint condition - all playing through KEF Reference 104aB speakers purchased new in 1977.  One and/or all of the systems is/are in daily use.
 
Thank you for your interest,
 
ferrari458spider

Dillen
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Dillen replied on Thu, Apr 5 2012 9:07 AM

Please use the 'Reply" button when replying or things get a bit complicated.  Laughing

Is the channel completely dead ?
On all sources (FM/Tape etc.) ?
Nu thump sound at power up ?

Martin

MBO
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MBO replied on Sun, Jun 3 2012 9:17 PM

Hi,

I had a 3000-2 type 2402 with teh same problem.

I traced the problem to faulty end stage decoupling capacitors. Simple to trouble shoot in this type, because you can just switch the wiring and the problem changes to the other channel.

IF that is the problem, there are repair kits on offer... I got one via this forum long time ago and it worked a treat.

 

Good luck.

 

Mike

 

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