This model should have a 'Zero Balance' button because the tonearm is electronically controlled. It also has an anti-skate setting, which is also managed by the tonearm's control board circuitry. The turntable has sensors for the tonearm's position/rate of movement, speed and size of the record. The tonearm bearing may be a bit sticky, especially if this turntable sat unused for a long time. You may need to clean the pivot or move it through its range several times, to see if it becomes free of restriction.
Go to
www.vinylengine.com for a manual- they have user and service manuals.