GR3 - Q. How do I change the speed between 33 1/3 and 45 rpm?

GR3 - Q. How do I change the speed between 33 1/3 and 45 rpm?

Answer:
You need to manually adjust the drive belt onto a different pulley. Lift off the platter and mat, then locate the small silver motor pulley at the top of the turntable. Move the black round-section drive belt to the large grooved section of the pulley for 45 and the smaller grooved section for 33 1/3. Make sure your fingers are clean and you don’t leave any grease on the belt. Manually rotate the sub platter (the larger of the two with the spindle in it) a few times to ensure the belt is properly located. Replace the platter and mat.  Below is from page 10 of the included user manual.