It's important to setup your decks correctly in order to play records with the lease amount of damage to the Vinyl, Stylus,and your mixing abilities. First if all best you get the manual for the turntable here this is very handy it's for the mk5 but the system setup is the basically the same for all the Technics SL1200 range. (1) getting the Turntable level.

Technics arm rest   comming soon

Technics loose arm problems are commonly found