These automations depend on mechanical linkages sometimes with also optical sensors which detect the arm position.
Generally they are frowned upon by purists because of the drag on the stylus applied by the mechanics and for that reason I would usually remove these before setting up an older turntable.
I'd recommend the same to you unless automation is something essential to you -- given that albums last around 25 minutes per side it's never been a great hardship to get up and trip the arm lever at such intervals.
The process for overhauling is much the same as for removal -- remove the platter and see what can be observed as you move the arm manually -- then if necessary remove the base of the turntable plinth and work from there. Look for mechanical links and electrical switches which are displaced -- and for optical sensors which have the same function and may have failed or been obscured by dust and fluff.