ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
The orange ones (and the grey ones too for that matter) seem to be less prone to failure than the dreaded red ROE ones. I'd replace anyway, for peace of mind.
Jacques
Peter:Thanks for your response Jacques! In replacing the 5000 µf grey filter capacitors, could I use 4700uf? It seems like they are much more common.
Thank you again Jacques for your help! That helped nicely. Here is what I found:
The bank of switches was indeed bent. Pliers and muscle, not often the most useful tools with B&O but today that's all that was needed. All the switches work as they should. Lamps all light up (for now), now just waiting for the trim pots and capacitors to arrive. I just finished recapping and wiring a set of Beovox 5700's and this will make a beautiful friend to them. Super excited.
Good job Peter, we are following
Collecting Vintage B&O is not a hobby, its a lifestyle.
Well done Peter! We need more pictures!
When the trimpots are replaced, please adjust as per service manual. Have you downloaded the service manual yet?
Thanks! Indeed I have downloaded the service manual and I have schematic from the secret envelope. Reading ahead as I wait for my parts to arrive, I don't think I understand how to adjust these idle trimmers. My only experience has been with the BM 5000 where it was very clearly described. Where do I attach my leads? Here are the instructions:
This is what I see:
the black trim pots are the 250 ohm currently installed. This is a later model with the added 4 extra trimmers flanking the black ones that the service manual says to not touch, with repercussions being...an unknown silent future?So anyway, what does the "r/hv" stand for that is mentioned in the service manual diagram? I can't find it referenced in any of my intro to audio component repair books. Still learning every day.
Peter
Good morning......I will be following your posts closely as I too am about to embark on this same adventure, having acquired a Beomaster 4000 (2406) on ebay for a very reasonable price I thought it was the least I could do to try and bring it back to its previous best. Everything seems to work, front facia is a bit faded by direct sunlight, and on initial power up I get a series of "snap/crackle and pop, this occurs on operation of most of the switches and sliders during operation too, opening the case reveals lots of dust and dirt so the first task will be a blow down with an air duster followed by servisol 10 contact cleaner, if I can get at the switch contacts which are buried within the bowels of the machine! I have received a kit of parts from Dillen which includes a lot more pots than I was expecting, the service manual isn't too clear on the reset values for all these little devils and to complicate the task further I don't have signal generator or scope, so some of the pots may have to stay original......however I will post pics of this adventure and hopefully we can swap horror stories as we both progress
Hopefully our stories will be of continued success and not horror! I ordered replacement pots for all but I only plan on replacing the 2 bias current pots since I also lack the proper equipment for setting the others. I am on vacation In Texas right now and look forward to returning home to a mailbox full of components. Until then I'll be looking forward to some pictures!
Hi Peter,
I've just checked in my loft and I still have my old UK-spec Beomaster 4000 from many years ago (slight damage to case, electrical condition unknown, but all switches working). Please let me know if you are interested in a "donor amp" at a very reasonable cost and I can get the switches and other parts checked out!
Kind regards, Steve.
Steve.
www.soundsheavenly.com
Founder of Sounds Heavenly Cables and Brand Ambassador for Bang & Olufsen
Sounds Heavenly are proud to sponsor BeoWorld!
Please check out my YouTube channel at https://youtube.com/soundsheavenlycables
r/hv is the color of the wire, in Danish rød/hvid, English is red/white
I suspect shipping a 10Kg amp from England to USA would cost about £60 GBP or $90 USD - I may get around to restoring it one day but life is so hectic that I'm happy for it to go to a good home if it is of use to a fellow Beoworlder. Please let me know if you would like more details and photos of the amp.
As I'm located in the UK this may be something I would be interested in.........what sort of remuneration would you be looking for should the unit change hands ;¬)
Craig
Craig: Peter As I'm located in the UK this may be something I would be interested in.........what sort of remuneration would you be looking for should the unit change hands ;¬) Craig
Oops.....should be asking Steve this question, sorry Peter
Hi Craig,
No problem! If you can please send me a PM with your email address (or contact me at www.soundsheavenly.com with your email address) then I can email you some photos of the amp. Once you have seen the photos, please feel free to make me an offer!
I will get it set up this morning to check everything works and report back. If you would like any more info, please feel free to ask.
Thanks guys,
The Beomaster is packaged up and on its way to its new home!
Buzzing in both channels and only radio and tape ?
Did you test with speakers connected
Work the ambio and speaker 1-2 switches several times and check again for differences speakers 1-2
If you have all the power supplies at the correct voltages and the idle current adjusted, the buzzing coming with all sources I would suspect the power supply or anything before the preamps
Congrats Peter, time and time again I stare myself blind with failures like this, good job finding it
Just at this point on my own project, waiting for 3 off new caps to be delivered......I feel compelled to say that loading up one capacitor terminal with no less than eleven connections is a bit excessive.....little wonder one connection was weak.
Hi peter,
in case it still is a mystery: hv is the red-white twisted wire at the bank of 4 wires and r is the red wire in the bank of 4 wires on the center right hd side.
cheers
ALF