7186 Turntable - Hints and Wiring Schematic

If (like me) you've still got one of those old metal turntables because (a) apart from the noise it makes, the thing still works ok and (b) it'd cost a fortune and cause major layout disruption to replace it with anything significantly better, then the schematic below may help when you have the odd spot of bother with it.

Actually, with a bit of occasional maintenance, they're pretty reliable things and simple to work on.  With regard to the motor, it just needs a little lube on the very odd occasion, and check brushes / brush springs etc while you're at it. The only other thing that may need attention, especially if it doesn't get used much, is the sliprings in the base that conduct the power to the motor and turntable bridge assembly. These get gunged up quite quickly if the turntable is not used regularly. The more the turntable is used, the less problem you'll have from dirty sliprings and contacts.

Can't get at the slip ring?  Well, to do any sort of maintenance at all - be it to the slip rings, the contacts, or the Turntable mechanism itself, you need to remove the "bridge" piece from the base.  Simply remove the circlip from the centre shaft (beneath the base) and the bridge will lift out.    Impossible??  Well what you should've done when you installed the Turntable is make a circular hole in the baseboard large enough to be able to release the circlip from below. - Wonderful stuff, hindsight

  Take care not to loose the "wavy washer" which conducts the ground to the TT bridge, and take care not to sprong the circlip over to the other side of the room when you're releasing or re-fitting it.   Actually, it's not a bad sort of idea to leave a length of the wife's brightly coloured sewing cotton permanently tied to the circlip.  That way, when it goes "sprong" (a) it won't travel so far with the cotton tied to it, and b) you'll be able to see it quite easily.