Can anyone tell me what the pin configuration is at the rear of the MMC series cartridges is.  I have just purchased another project and the enamelled copper wiring to the cartridge is all damaged and needs replacing.  The deck is a BG2200 and the cartridge is a MMC20E, though I guess all the MMC series are probably the same.

I can see 5 strands of wire at the turntable end, 2 for each channel (the two earths are joined together), and the 5th wire is connected to chassis ground.  Does this connect anywhere at the cartridge end?

Looking at the rear of the cartridge & going left to right the signal paths are :-

1. Ground Right

2, Right

3, Left

4, Ground Left

The turntable ground/earth wire goes to the cartridge body via the slotted hole at the bottom which accepts the spring clip.

Chris.

Thanks Chris.

This now gives me another problem as I am missing the spring clip and the screw to hold it onto the arm.  I assume the clip is held in place by the same screw that holds the cartridge mount?  Has anyone got any going spare?

There are 2 types of spring clip used with these cartridge mountings. One is a flat piece of copper & the other is a copper wire bent into a "diamond" shaped hoop (for want of a better description). I'm sure it is possible to make one if you can find some sprung copper - if memory serves me correctly the wire type was the better method.

Chris.

Ok, thanks, I'll have to improvise.  Presumably without it it may hum.