5A speed control screw is provided so that maximum toolspeed can be limited (variable). Turn the speed controlscrew clockwise for higher speed, and counterclockwisefor lower speed.Lighting up the lampsFor Model HP2050F, HP2051F1002689CAUTION:• Do not look in the light or see the source of lightdirectly.To turn on the lamp, pull the trigger. Release the triggerto turn it off.NOTE:• Use a dry cloth to wipe the dirt off the lens of lamp.Be careful not to scratch the lens of lamp, or itmay lower the illumination.Reversing switch actionAB1002991This tool has a reversing switch to change the directionof rotation. Move the reversing switch lever tothe position (A side) for clockwise rotation orthe position (B side) for counterclockwise rotation.CAUTION:• Always check the direction of rotation beforeoperation.• Use the reversing switch only after the tool comesto a complete stop. Changing the direction ofrotation before the tool stops may damage the tool.Speed change12002691Two speed ranges can be preselected with the speedchange knob.To change the speed, turn the speed change knob sothat the arrow on the tool body points toward the "I"position on the knob for low speed or "II" position forhigh speed.If it is hard to turn the knob, first turn the chuck slightlyin either direction and then turn the knob again.CAUTION:• Use the speed change knob only after the toolcomes to a complete stop. Changing the toolspeed before the tool stops may damage the tool.• Always set the speed change knob to the correctposition. If you operate the tool with the speedchange knob positioned halfway between the "I"and "II" position, the tool may be damaged.Selecting the action mode1002692This tool has an action mode change lever. For rotationwith hammering, slide the action mode change lever tothe right ( symbol). For rotation only, slide the actionmode change lever to the left ( symbol).CAUTION:• Always slide the action mode change lever all theway to your desired mode position. If you operatethe tool with the lever positioned halfway betweenthe mode symbols, the tool may be damaged.1. Action modechanging lever1. Arrow2. Speed changeknob1. Reversingswitch lever1. Lamp