BeoGram

Re: Beogram 4002 / 6000 Problems and Solutions

yachadm — Tue, 30 Aug 2011 15:49:42 GMT

LED sensor mod/replacement: see the abovementioned PDF, section 8.

I've just got a BeoGram 4000 in for restoration - not in great shape at all - I picked it up off the kerb from a moving sale - I'll be posting progress as I go along, in a new thread.

Menahem

Re: Beogram 4002 / 6000 Problems and Solutions

Rich — Mon, 29 Aug 2011 18:21:03 GMT

I heard back from Benny today regarding this nightmare. He ultimately replaced the motor, the relay, and the trim pots to get the speed right. He also did some adjustments to my tonearm and replaced the output cable (at my specific request).

Re: Beogram 4002 / 6000 Problems and Solutions

joeyboygolf — Sun, 28 Aug 2011 14:57:28 GMT

I had the same problem this week with a 4002 type 5524. Turned out to be the AC motor at fault.

Re: Beogram 4002 / 6000 Problems and Solutions

Søren Hammer — Sun, 28 Aug 2011 13:16:11 GMT

I have a similar problem, almost cured it with a less used speed change relay (flip flop type)

The speed regulators on the PCB and control panel could also be in need replacing.

Re: Beogram 4002 / 6000 Problems and Solutions

Keiko5 — Sun, 28 Aug 2011 11:57:38 GMT

What a timely resurrection of this thread. My dear 4002 just started having speed stability issues last night. At 33rpm it will slow down momentarily and then return to 33. I can only detect a slowing of speed and not any speeding up. The warmer it gets the worse it fluctuates. After eliminating belt slippage as the issue, it seems I need to start replacing caps. Can anyone tell me which ones I should start with? I can solder, but I am not the best at it so I don't want to replace everything whole hog (is that a yankee term?). I read (and saved) Menahem's excellent paper on resoration, but if someone could tell me where I should start that would be great. There are no other issues with the deck, and from the appearances it looks all original inside except for the belts and bulbs that I have replaced.

Kevin

Re: Beogram 4002 / 6000 Problems and Solutions

camshaft — Sun, 28 Aug 2011 10:49:59 GMT

That was it! Thanks guys. By the way, has anyone ever tried replacing the sensor arm-light with an led?

Re: Beogram 4002 / 6000 Problems and Solutions

joeyboygolf — Sun, 28 Aug 2011 10:46:13 GMT

The plastic ruler is mounted on a metal bracket fixed to the moving carriage by two set screws which allow adjustment of the distance of the ruler from the phototransistor at both ends of the travel.

I normally use a folded piece of paper as a feeler gauge to set the ruler up prior to tightening the two screws.

Re: Beogram 4002 / 6000 Problems and Solutions

tournedos — Sun, 28 Aug 2011 10:39:22 GMT

Yes, it is adjustable. Not by those three screws (which allow adjusting the ruler longitudinally, moving the touchdown point), but two other screws holding the bracket where the ruler is attached. Service manual page 3-2.

Re: Beogram 4002 / 6000 Problems and Solutions

camshaft — Sun, 28 Aug 2011 10:28:03 GMT

Hmm, it was awhile ago I fixed it, so I can't remember exactly, but I can see why it'd be confusing from that picture you posted. I remember when I ran the carriage though, by the time it got to the end the sensor was too far from the ruler. I had thought on my turntable one of the plastic screw slots on the top was perpendicular to the ruler, allowing you to adjust the angle before tightening the screw. There was definitely something on mine that allowed me to adjust how far the sensor was from the ruler though. Sorry I can't remember.

Re: Beogram 4002 / 6000 Problems and Solutions

yachadm — Sat, 27 Aug 2011 23:41:25 GMT

I'm not sure I understand - it's a plastic ruler, with printed markings, and 3 screws to hold it down.

How can it be skewed, other than it not being secured properly with the screws?

In the pdf which covers all the details, see section 9 for the ruler issues.

B&O BeoGram 4002, 6000 Turntable Restoration Repair

Menahem

Re: Beogram 4002 / 6000 Problems and Solutions

camshaft — Sat, 27 Aug 2011 21:19:32 GMT

I stumbled on this thread by searching, and even though it's old, since there's already quite a bit of information about various problems I figured I'd add one of my own problems I've found in the past just for reference in case someone in the future happens across the same issue.

If the automatic arm return at the end of the record either doesn't activate, or activates too late, check the position of the plastic optical ruler inside to make sure it isn't tilted away from the sensor. If the angle is skewed, then by the time the arm reaches the end of the record the sensor is no longer close enough to the ruler to see the markings.

Re: Beogram 4002 / 6000 Problems and Solutions

auric — Tue, 25 Mar 2008 17:58:31 GMT

Jeff:

Take the platter and belt off. Place your finger on the pully and hit the "on" button. Can you feel any jerkiness as soon as the arm reaches the play position?

Derek

Re: Beogram 4002 / 6000 Problems and Solutions

Peter — Sun, 09 Mar 2008 07:59:59 GMT

Very good of you! I'll pin this!

Beogram 4002 / 6000 Problems and Solutions

yachadm — Sun, 09 Mar 2008 06:51:03 GMT

Hi all,

After many trials and tribulations, I have completed a total overhaul of my BG6000 Quad, which I bought last year on Ebay from a used HiFi dealer in Toronto. Previously, I thought I that had fixed all the problems, but as I progressed, hidden defects came to light, which the previous owner/technician had intentionally hidden quite skilfully.

This obviously highlights the well-known adage - "buyer beware".

To spare the rest of you BeoFans who own (or are considering owning) this magnificent turntable, most of the troubleshooting I had to go through, I have compiled this list of what mostly needs to be repaired on a unit with an unknown history.

http://forum.beoworld.org/forums/thread/94148.aspx

Beogram 6000 / 4002 ToneArm not lowering - Lubrication Points

Beogram 6000 / 4002 33/45 Speed Problem

Beogram 6000 / 4002 CD4 PCB Capacitor replacement

Beogram 6000 / 4002 prematurely ends play

Beogram 6000 / 4002 33/45 LED Indicator Upgrade

I hope you all enjoy this, and save yourselves lots of time, which can be better spent listening to your LP's!!!

Now available in downloadable PDF format:

B&O BeoGram 4002, 6000 Turntable Restoration Repair

Menahem