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  • Who is offering a Beomaster 4000 Service / Refurbishing

    Hi all, I'm looking for someone who is able to do a service on my Beomaste 4000. One channel is almost gone, som lamps have to be exchanged an probably some elkos have to be exchanged. Any comments welcome. Northern Germany or Denmark is preferred, I can bring the Beomaster in. I'm located in...
    Posted to The Workbench (Forum) by Robert on Thu, Mar 27 2014
    Filed under: Repair, beomaster 4000, service
  • BeoMaster 4000 - need diagnostic help

    Hello all. I am a new member here and I would love some help getting started with the restoration of a non-functioning BeoMaster 4000. I don't know anything about this amps history accept that it blew a main fuse and then its previous owner boxed it. It is in nice shape cosmetically. It has definitely...
    Posted to The Workbench (Forum) by KineticsPHD on Wed, Oct 7 2015
    Filed under: beomaster 4000
  • Beaomaster 4000 switch and tuner light issue help

    I just recently acquired a very nice Beomaster 4000 and a pair of Beovox S45-2, both very good condition. But I actually have 3 small things I actually need to fix to get a perfect Beomaster: -Both speaker button doesn't engage on the lower position. I need to force them down to get sound. I looked...
    Posted to The Workbench (Forum) by Darthfrancky on Sun, Dec 13 2015
    Filed under: beomaster 4000
  • Beomaster 4400 Fuse blown after switching to loudspeaker "2"

    Dear members, My main fuse T 2.5 A is blown after I turned on the swich for the second pair of loudspeakers, although there was no set of loudspeakers attached to the second port. The overload signal was burning for a short while and after 2 seconds there was a complete shutdown. One of the main fuses...
    Posted to The Workbench (Forum) by flipper62 on Wed, Jul 27 2016
    Filed under: internal fuse, beomaster 4000
  • Beomaster 4400 Fuse blown after switching to loudspeaker "2"

    Dear members, My main fuse T 2.5 A is blown after I turned on the swich for the second pair of loudspeakers, although there was no set of loudspeakers attached to the second port. The overload signal was burning for a short while and after 2 seconds there was a complete shutdown. One of the main fuses...
    Posted to The Workbench (Forum) by flipper62 on Wed, Jul 27 2016
    Filed under: internal fuse, beomaster 4000
  • Beomaster 4000 for parts :(

    I have a Beomaster 4000 that was working nicely before I tried to fix a simple Speaker B switch issue. I wasn't successful fixing it and now the switchboard is defective but everything else is/was working just fine. It makes me sad, but hopefully it can be used as a donor to fix other Beomaster....
    Posted to The Workbench (Forum) by Darthfrancky on Mon, Nov 23 2020
    Filed under: beomaster 4000
  • Beomaster 4000 model 2406 resurrection

    I was picking up some Beovox P45's from a 2nd hand dealer when I saw the BM4000 lying in a corner. "How much for that" was answered with "It won't even turn on, take it if you want it". Of course it went home with me and it is still a work in progress. Both fuses were blown...
    Posted to The Workbench (Forum) by AntonvZ on Wed, Feb 24 2021
    Filed under: beomaster 4000, BM4000
  • Re: Beomaster 4000 model 2406 resurrection

    How to measure Darlington Transistors with a DMM? Well from what I've read you can't really do that. The Darlingtons MJ3001 and MJ2501 both contain resistors and can apparently only be tested in a circuit to see if they turn on and off as they act like intergrated circuits. Way beyond my current...
    Posted to The Workbench (Forum) by AntonvZ on Sun, Feb 28 2021
    Filed under: beomaster 4000, MJ3001, darlington transistors, MJ2501
  • BM4000 Replacement Transformer Specs

    Will the attached transformer specs be good enough to replace the original BeoMaster 4000 type 2408?
    Posted to The Workbench (Forum) by Djagan on Tue, Nov 3 2020
    Filed under: beomaster 4000, Power unit, beomaster 4000
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