this is a video showing you how you can adjust the pitch range on a technics 1200/1210 MKII, the factory setting is +8 and -8 but follow the video and you can ever increase it to +12 and -12 or decrease to +3 and -3 better for fine tuning.
WARNING ALWAYS UNPLUG FROM THE MAINS BEFORE OPENING YOUR TURNTABLE.
problems you may run into.
if the potentiometer is stuck and wont move (very rare but it does happen)do not force it, use a tiny bit of olive oil on a cotton bud and dab a TINY bit round the bottom of the pot and leave for 10 minutes dont use wd40 or other water displacing Penetrating fluid some are quite corrosive. if this doesnt work it may need replacing or way your options and consider not doing anything just leave it on the factory setting.
always unplug before you open anything.
never touch the voltage selector it will be set to your regions power supply.