I recently acquired a Beogram 4002 in near mint condition and really like it.  Everything works flawlessly on it except one thing.  Someone had previously hacked off the DIN Connector and did a poor job of putting on some RCA connections.  It's been working but with intermittent drop outs in the left channel that were fixed with a wiggle of the plug at the amp connection.  It's gotten progressively worse and it's time to fix it.  I removed the butcher job the previous person had done, but now have a problem figuring out what wires are what.  Not finding much help in searches, only PIN indentifiers, which don't help me because I don't have the DIN connection on it.  What I do have is this.  The cross section of the cable goes like this:

Outer Copper colored wire layer, layer of insulation, then a silver wire layer, then another layer of insulation, then in the center core 4 wires with insulation colors Red, Blue, Yellow and Brown.  So I just want to start from scratch here and solder new RCA connectors to this.  But I need to know what each of these wires are for.  ie: Right+, Right-, Left+ and so on.  I wasn't able to confidently indentify them when taking the old ones off because they were too messed up and want to make shure they're right this time anyway.  This does have a seperate ground wire which appears to be OEM also.  And of course it does have the 4 channel capability, which I won't be using.  But I don't know if any of those wires have anything to do with that.  Are the inside colored wires like a standard tonearm wire scheme of some kind, like you'd see plugged into a standard cardridge?  Any help indentifying these wires would be greatly appreciated So I can get my signal again.  Otherwise I love this 'table and want to keep it going.

Thanks in advance for any help or info in the right direction!

Hi BeoStick

If you have the CD4 demodulator, your connector should look like the picture:

Red - Right Rear +

Blue - Left Rear +

Yellow - Left Front +

Brown - Right Front +

Their Minus signal is the common SIGNAL ground - the silver wire layer.

The outer copper layer is ground to the casing of your receiver/amplifier. The silver wire layer and outer copper layer are NOT connected together - you can open your BeoGram to see this!

That CD4 demodulator is a superb RIAA amplifier - you do not need another phono preamp with it!

Connect the cable to your amplifier's Line-in connection (Tape/ CD/ VCR/DVD).

Menahem

Hey Menahem, Thanks so much, this is exacty what I needed. I'll try and work on it this weekend. To use that CD4 demodulator as a phonograph preamp do you have to switch the switch on the side to "CD4" and does it work fine if only using a stereo mmc4000 cartridge and front L & R outputs (not 4channel)?

Thanks s much, your help is already great!

The CD4 switch at the OFF position activates the function of a standard Stereo RIAA amplifier.

The CD4 switch at the CD4 position activates the quadraphonic decoding circuits.

The MMC4000 is not capable of picking up the 30kHz carrier-signal on a CD-4 LP, so you don't ever have to put the switch at the CD4 position.

Only if you have the B&O MMC5000, MMC6000, or the SoundSmith SMMC20CL cartridges, will the CD4 position be of any use.

And for only STEREO LP's (as opposed to Quad LP's), the MMC4000 (or SMMC20EN) is a nicer sounding cartridge, than the more expensive cartridges mentioned above.

Regarding your cable, if you want a ready-made cable with the 4 RCA plugs already professionally made (I think you'll have a heck of a job with the single signal-ground silver cable to 4 plugs), contact lazerwave - I send o lot of customers to him - Tell him what you want, and he'll custom-build it for you.

http://myworld.ebay.com/lazerwave&sspagename=ADME:X:CEM:US:11

You'll just have to solder his cable to the CD4 connector in the photo.

 

And if you want more details on taking care of your BG4002, download this

http://www.condoraudio.com/wp-content/uploads/Projects/BeoGram-4002-6000-Turntable-Restoration-Repair.pdf

 

Menahem