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 All!
Any insight would be most appreciated. The issue I have is when i press play the tone arm travels fast towards the end of the record. if i press play again it will drop the tonearm while still traveling towards the end of the record (this is very disconcerting) stop will lift the tone arm and stop it from traveling further but will not return the tonearm to the start resting position. so eventually the unit gets stuck at the end of the spindle if you let it play out. the only way i can get the platter to stop turning is to manually press the stop switch near the servo motor.
The interesting thing is that given time, lets say i leave it over night and i press play again everything works as normal and the tone arm returns to the end and all the other functions work as intended including auto play/stop and return etc. but this only lasts for a little while before the fault comes back.
has anyone seen anything like this or have any insights? or is there another post I may have missed?
Thanks!
Ben V
I managed to fix the problem with the help of my brother. We both have little to no electronic experience so it took us a while to figure out and repair.
First we noticed a discolouration on the circuitboard around TR21 and R73.
Looking through the troubleshooting guide we found a section that connected TR21 and transport continuing across the platter.
We replaced the transistor TR21 and the Resister that was connected R73.
Later I tested the old resister R73 and it was still good so the problem was TR21
As of now the record player works great! hope this thread helps in anyway.
Cheers!
Re: Beogram 4500 turntable arm going rogue
Hello, bpvaat,
I seem to have the same problem you have experienced with the Beogram 4500 turntable.
Unfortunately, your jpeg links on "BeoWorld Forum - Vintage Products" are no longer active.
Any chance of retrieving those jpegs?
If you could help me with this I would be ever so grateful!
And it might save my Beogram turntable from The Dump...
Kindest regards,
fyrafemnollnoll (eng. fourfivezerozero)
Im having trouble uploading to this forum, Here is a dropbox link to the pics let me know if this works or if you have any questions.
https://www.dropbox.com/sh/dksc9p8zznltqth/AADgVsWukZFoQW4c_6X5ZSdSa?dl=0
Beogram 4500 and Beogram TX are two completely different decks.
Martin
Thanks Martin,
Isn't the US standalone model TX2 the same as Beogram 4500? I would assume that the tangential function/design of the drive unit for Beogram 4500, the TX and the TX2 is almost identical, albeit the 4500 is an older model.
Surely B&O must have used common parts throughout their product lines, for scale. If not, that alone would explain the premium price.
I'll give it a try, and post the result.
Beogram TX2 has a lot in common with Beogram 4500, though not at all identical (datalink, RIAA etc.), butBeogram TX is nothing like Beogram TX2.They actually have only one or two screws in common.See here:https://beocentral.com/beogramtxhttps://beocentral.com/beogramtx2
Regarding the carriage movement, Beogram TX has a servomotor, belt and threaded shaft for the carriage, where the TX2 has a motor, a large cam and a wire drive.
Does the motor on the TX2 perform the same basic function as the servomotor on the TX? i.e. simply put, turning clockwise and anti clockwise at variable speeds? If so, like my issue could the problem still possibly be a faulty electrical component on the ‘servo motor control’ part of the circuit board?
I have very limited electrical experience. Being different decks I understand that the problem may not be linked to the one I had with the TX. Any advice you may have Im sure would be helpful. I would hate to see the turntable hit the dump! especially if it still has a nice cartridge.
bpvaat: Does the motor on the TX2 perform the same basic function as the servomotor on the TX? i.e. simply put, turning clockwise and anti clockwise at variable speeds?
Does the motor on the TX2 perform the same basic function as the servomotor on the TX? i.e. simply put, turning clockwise and anti clockwise at variable speeds?
Basically, yes. At least one way, in that the return to park position is performed mechanically.Most tracking problems in the type 59xx decks are caused by a bad lamp and/or LDR, wrongly set tracking force or a bad cartridge needle.
Obviously a lot to consider. Actually I may go for a pickup replacement. My needle does look a little bent...
Thanks for your comments and help, both of you.