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
Peter has set me a challenge.....when he kindly loaned me his 4401 he also thought it may be fun for me to establish why his 4002 refused to function. Therefore following a quick inspection of the internals which revealed nothing untoward I dropped an album onto the platter and pressed Start.
The slider travelled along to the edge of the album and the pickup arm dropped neatly onto the starting groove......but the platter remained motionless. Selecting stop lifted the arm and the slider moved back to the rest position. Removed the album, platter and replaced the stylus cover.
With the platter and drive belt removed I found the motor free and with obvious damage, selecting start and allowing the slider to travel and pickup are to drop I selected 45 rpm the illuminated scale for 33 went out and the scale for 45 came on, still the motor refused to turn.
I should have said "with no obvious damage" regarding the motors appearance, however as I prodded and poked my way around the board consulting the circuit diagram for clues I suddenly noticed the drive motor had started purring away at 45rpm, I hooked up my equally dusty scope to see if the AC frequency was being generated by the motor and found it was.
I take it that you vacuumed the inside to save my blushes! Although I imagine the 4000 and BM6000 are the worse culprits as they had been under the bed for the last 3 years! When I last played with the '4001' , the 45rpm worked but the 33 did not. Unlike the 4004 I am using at present in which the 33 works and the 45 does not - not a handicap in my case!!
Peter
However switching back to 33 rpm stopped the motor and switching back to 45 didn't make it start again.....it took several operations back and forth between 33 and 45 to finally coax the drive back into life, and then only when set at 45 rpm. looking at the circuit diagram and seeing that the drive seems to be functioning fine I suspect poor contacts on RL1......it will have to come out.
Removed all the connectors and the retaining screws and lifted the board out, the speed adjustment trimmers don't look in too bad a condition, I was hoping they would be, however as I have a couple of 5k encapsulated trimmers "in stock" I will change them out anyway.
Started checking around the solder side connections of the R1 relay with a DMM to determine which connections where which and got the readings below, looks like the relay contact 6 which I believe to be the common and should be closed circuit with contact 5 when de energised is open circuit, the other readings look acceptable.
these are what I believe the solder side connections to be, I also measured across terminals 8 & 9 which drives the 33 rpm scale lamp (and is working) and did get continuity across the terminals, though the resistance was quite high.....I'm now in the market for a replacement relay
Does anyone know where such a relay is available? Siemens V23012
http://archivedforum2.beoworld.org/forums/t/22146.aspx
discussion of a quick fix or custom fix options
Thanks for that....I have already seen the suggestion, it's amazing how many threads there are on the site regarding this particular issue, however I have sent Rudy an email for one of his custom made replacements, better solution in the long run.
Craig
Very interesting to see "Beogram 4001"!
I heard about Peter's Beomaster 4401 (version of Beomaster 4400 with black front) and I know it was "halfway official" model or prototype.
But I didn't realize that it was also black version of Beogram 4000 called Beogram 4001?!
Was it also B&O prototype or custom-built version (such a Frede's black system Beolab/Beomaster 5000)?
Sorry if off topic
Vintage Bang & Olufsen
Kitchentable homebrew
Martin
Dillen:Kitchentable homebrew Martin
Go on - it must be real - it appears on Beophile!
It started life as a Beogram 6000 - unfortunately it was severely damaged by damp whilst at Bellac (ancient history) and so I decided to make it into a Beogram 4001 to match the 4401. It is not as good as Frede's 5000 system, which is stunning, as i did it myself and it is painted rather than anodised. The cartridge is a MMC20S which has been retipped by Axel with a Shibata stylus so is also black! The quad decoder board was removed and donated to Tim's collection as I have a pretty low regard for quad records. It worked for some time but the 33 speed went off and I used either the 4000 (also on a winter break with Craig, but hopefully working!) or my 4004, which I bought new in about 1980. I mainly use my Beogram 3000 though which Frede restored and is of course completely manual so works very well!
Ohhh, I see !
Thanks for clarification ...
Peter: Go on - it must be real - it appears on Beophile!
You can order belts for it on Ebay.
And, if you are to trust this page, it's highly valuable:http://www.ebay.com/gds/Top-10-Vintage-Bang-Olufsen-Record-Players-/10000000177678348/g.html
Ah well.....be that as it may, nobody will be surprised to learn that when said relay was removed it was full of nasty's
Fair to say most of what is there came from the base of the relay and not inside, but it still refused to work when manually operated from the armature, took the time to change the RPM trimmers for 25 turn bourn units.
As I'm now awaiting the replacement relay I will replace the remaining trimmers (nasty looking ones) and also the old capacitors for good measure.
I like it! I'll have to make a few more!
decided to get on and replace the nasty looking trimmers and the half dozen electrolytics whilst waiting for the relay to arrive.
The replacement relay finally arrived, looking at the UPS tracking information it seems to have been around the world more times than Tim Peake ;¬) however its here now.
Another little job that was required was replacing the guide washers for the outer frame, some where missing and some had simply vanished.
the other side
And while the control panel was removed it seemed rude not to replace the relay, trimmer and cap before putting it all back together.
Re assembled everything, put a bit of glue on the loose side trim....and powered up. much to my surprise everything came on and appears to work as it should, set the RPM up with Rudy's patent tacho and boxed it up.
Connected her up to my 4400 and dropped some vinyl onto the platter, I suspect the albums Peter left for me are in dire need of cleaning! the hybrid 4001 picks up every spec of dust and slight imperfection, works well though......so having completed Peters challenge it looks like I am now the proud owner of a Beomaster 6000 quad, which looks in pretty good shape cosmetically.......another toy to while away the dark winters nights ;¬)
It is one of the problems of the shibata stylus - delves areas of records not reached by other cartridges!