DUAL 1214 turntable

[Did70]

Hi,
I'm a new (french) member, and I search a service manual for my first 1214 Dual turntable. It's quite impossible to find one here. Mine was made in 1973, I've bought it in '75 and I've now some problems with the electric motor which doesn't run enough fast

I've all cleaned and put new grease, but it's the same.

Thanks for your help

Did70