An out of focus image of the star should be visible. It probably isn't exactly centered, so use the hand paddle to center the object on the cross hairs. Once a known star is centered in the eyepiece, you can enter the coordinates. You can find the coordinates in either the Astronomical Almanac, or in the Sky2000 program located on Lenin. Make sure to look directly down on the dial, to avoid parallax problems.
Declination is just a bit more difficult.
The inner circle is used when the telescope points above the equator, the outer when below. There is a bit of slack in the declination knob. Turn the knob counter-clock wise past the point you are trying to reach, and then turn the knob clockwise until it is where you want it. The coordinates should now be set. To go to your science object push the slew and guide buttons.