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
Hi everyone,
About 9 months ago I picked up a Beogram 6000 type 5503 which had a hard life. It had some bending of the mounting points of the arm slide and a few other issues with caps, etc. It really was most likely bound to be a parts unit however I got it back up and running for several months of trial and error.
The background is in this thread http://archivedforum2.beoworld.org/forums/t/5485.aspx
When i first got the unit and running, it would play an LP but at the end of the record it would not return home and turn off (run off stop), the arm would sit in the lead out groove until I manually pressed Stop and then it would return home and power off as required. I adjusted the perspex ruler by moving it to the left as far as it would go and the unit began to return as expected at the end of a record.
A few weeks of happy spinning later and a new problem arose, the unit would intermittently stop playing and the arm return home and shut off mid way through a 12" 33rpm record. The point at which this was happening was before the 7" landing zone, at perhaps 5" from the centre. I noticed the plastic housing around the ruler sensor was actually not aligned flat with the ruler, it was bent backwards which meant the housing was out of line not the ruler. I pulled out the ruler and de-soldered the ruler sensor and cleaned it and then refitted the sensor and housing.
This seemed to resolve the issue for a few more weeks but then the 'stop playing midway through an LP" issue came back with a vengeance so I took the unit to my repair tech friends place and he replaced 1C23 in the circuit and installing a 4.7mf cap across 1R91 as per service instructions. I finally (after three months) tested the unit last night and the unit will no longer run off stop and the end of a record. I checked the ruler which is fully pushed to the left (to get run off stop as early as possible), I removed the light bulb housing and cleaned the bulb, I cleaned the ruler to ensure no finger marks,etc..tried it again and to no avail so I packed it away.
I would love this 6000 to run properly, it is really a resurrection from the dead and its amazing that I have got this far given it had physical damage and it had been tinkered with by someone else in the past. The sound from the inbuilt phono preamp is lovely and it actually looks quite nice, however it would be better parted out to help other 6000 users than left to rot if I cant get it to behave.
Being a 5503 it uses traditional bulbs not LED's. All the bulbs are functioning, are there any words of advice people can offer me with this issue of run off stop not working and the arm intermittently raising? I have a perfectly working 4002 type 5523 (so much easier to work on once they went to IR and LED and less complex parts) so having a second linear tracker is really a luxury not a necessity.
I was thinking perhaps a new lamp for the ruler assembly or an LED swap over, if the lamp is working for the ruler is this usually all that is required? Changing the photo sensor to something newer - finding parts,etc seems like a lot of effort... any other words of advice people can offer or suggestions?
Much thanks
Andrew
Hi everyone
Bit of an update and a bit more exploration I seem to have arrived at a solution.
My repair technician friend replaced the lamp for the ruler with a 3V LED. We replaced the transistor and capacitor which drive run off stop. We believe the transistor may have been faulty causing the unit to intermittently perform a run off stop before it was supposed to be doing so.
I was finding that I had to have the ruler adjusted all the way to the left to get run off stop to work and to drop at the right place on the lead in groove, we have since been able to adjust the ruler back towards the center as the cap seems to be charging correctly now to initiate a drop of the arm and run off stop.
So it seems I am back on track. The LED conversion seems much less of a fuss than playing around with old school bulbs.
I now have two very lovely Beogram 4000 series decks, an AC 6000 quad type 5503 and a DC 4002 type 5523.
Drew
Thank you Drew for keeping us posted.
Nice work !
Any pictures of the finished deck?
Jacques
A few videos perhaps? A Nina Simone 180g pressing, unfortunately the centre hole is incorrectly punched so you get a little lateral movement in the arm. Anyhow here you go;
http://www.youtube.com/watch?v=ueM9GKk45zc
http://www.youtube.com/watch?v=reTTfn0LPns
The Beogram 6000, needs a bit of a clean after a few months in the workshop, but running well.
The whole setup, Beomaster 1900 which has been fully rebuilt (martins cap kit, rectifier, rebuilt pots, new globes, etc), Beogram 4002 type 5523 which has had a large overhaul (caps, clean and lube, align arm, cleaned speed relays, some IC's replaced), the Beogram 6000 and the Beovox S45-2 with the earlier model clear dome mylar tweeters.
Just beautiful Drew, Have been following your thread, love to see when vintage gear comes back to glory, and more praise to you, as you are "down under", with all the problems with spares and long shipping ways.
Collecting Vintage B&O is not a hobby, its a lifestyle.
Well done Andrew, it gives a good feeling to save a piece of art like that. It's awesome to be proud of your own work there.
Nice to see other Beoworlders on the IKEA Expedit banwagon
Vinyl records, cassettes, open reel, valve amplifiers and film photography.