BeoGram

Re: BG 4002 pickup arm motor rumble

Medogsfat — Sat, 07 Feb 2009 13:09:45 GMT

Beautiful - I am genuinely pleased this turned out well. Who would have thought the motor from a Beogram TX (or possibly BG8000 - can't remember the exact source) would work in a 4002? Derfinately one for the memory bank.

Looking at these makes me want a similar system so I may just start with the 4002 I have already and work through ebay. Whether the wife agrees is another matter

Chris.

Re: BG 4002 pickup arm motor rumble

Folke — Sat, 07 Feb 2009 12:33:54 GMT

Thank's again, Chris!

Another picture, I couldn't resist...they look so good together!

Re: BG 4002 pickup arm motor rumble

Medogsfat — Sat, 07 Feb 2009 11:46:09 GMT

Brilliant news!

Makes all the effort worthwhile doesn't it? I'm glad I could help in some small way towards getting this lovely deck back into working order.

Chris.

Re: BG 4002 pickup arm motor rumble

Folke — Sat, 07 Feb 2009 08:38:18 GMT

At last! Thanks to Martin "Dillen's" efforts and support, and Chris "Medogsfat's" generous donation of a replacement pickup arm motor, my BG4002 is up and running! The new motor is dead quiet, the old one sounded like an electric razor and ate transistors for breakfast. But now the turntable is adjusted according to the service manual (thank you, BeoWorld!) and works perfectly. The old, used MMC5000 I found sounds very good, albeit a smidgen bass heavy.

Some minor work remains: I need to polish the acrylic lid, it looks pretty bad, and find some rubber feet. The two front ones are present, but the rear ones are missing. Part No. 3103067, I believe. I'd be very grateful if anyone has a source?

/Folke

Re: BG 4002 pickup arm motor rumble

Medogsfat — Fri, 30 Jan 2009 17:10:31 GMT

Hi Folke,

thanks - I got your PM and left a reply. There was a problem with the PM system after the move to CS2008 but Keith Saunders has now fixed this - he's a seriously clever guy.

Chris.

Re: BG 4002 pickup arm motor rumble

Folke — Fri, 30 Jan 2009 16:56:23 GMT

For Chris.

PM seems broken, so I'll post here. Motor's arrived, twirls nicely using a 9 Volt battery, and looks like a drop-in replacement. Update when installed, some more work to be done first. Many thanks!

EDIT/ But now PM seems to work!

Re: BG 4002 pickup arm motor rumble

Folke — Thu, 22 Jan 2009 15:44:38 GMT

Martin Olsen, if PM doesn't work, please e-mail me

Re: BG 4002 pickup arm motor rumble

Folke — Thu, 22 Jan 2009 10:56:07 GMT

Martin, you have a PM

Re: BG 4002 pickup arm motor rumble

Dillen — Sun, 11 Jan 2009 06:21:42 GMT

Hard to say for sure but certainly not impossible. The board will be fine again, it has been repaired, soak tested and only the trimmers need replacing now.

Martin

Re: BG 4002 pickup arm motor rumble

Folke — Sat, 10 Jan 2009 15:17:28 GMT

Ouch! I'm keeping my fingers crossed, hoping you can salvage the board.

/Folke

PS. Is it possible that this fault put the motor in "reverse" before the components failed?

Re: BG 4002 pickup arm motor rumble

Dillen — Sat, 10 Jan 2009 14:05:10 GMT

If this motor was used together with the board that you send to me
for repair, it's quite understandable. The H-bridge was shorted, causing
full DC to reach the motor at all times, toasting a couple of transistors
as it went along.

Martin

Re: BG 4002 pickup arm motor rumble

Folke — Sat, 10 Jan 2009 10:26:13 GMT

Chris, you have a PM.

Re: BG 4002 pickup arm motor rumble

Folke — Fri, 19 Dec 2008 16:20:52 GMT

Despite my best efforts, the old motor has seized up almost 100%. I can measure it getting say 9V, but it just wont budge. If I help it rotate, it can go on for a sec. or two.

Chris has been very generous, and I'm looking forward to trying the motor he is sending me. Hopefully, I can find spare parts here in Sweden that he might have som use for!

Update will follow when I have installed Chris' motor. Fingers crossed...

Re: BG 4002 pickup arm motor rumble

Folke — Fri, 19 Dec 2008 11:39:54 GMT

Chris, Santa Claus is for real and lives in Yorkshire...

Re: BG 4002 pickup arm motor rumble

Medogsfat — Fri, 19 Dec 2008 11:21:05 GMT

I'm not really an expert with these turntables (that's Martins title) but I'd agree with you that it sounds like the motor is faulty.

Any way, I've got your address and I'll post the motor I have to you next week. Not sure when you'll get it with it being Christmas and all that. I have studied the photo of yours and compared it to the one I have and I'm sure it will fit in the housing but you may need to swap the pullies over or do a bit of jiggling around to get it to line up with the one on the shaft. Hopefully though it will slot straight in.

Chris.