Detection of the nominal resistance of the chip potentiometer: measurement, the first choice of the appropriate meter multimeter resistance range, the two table pen were connected to the fixed potential of the two chip potentiometer between the two fixed pins, the first measurement of chip linear position sensor potentiometer The total resistance is the same as the nominal resistance. If the measured resistance is infinite or greater than the nominal resistance, then the chip potentiometer has been open or variable value damage; Second, then the two table pen, respectively, SMD potentiometer center head and two fixed-side At either end, slowly turn the paddle potentiometer handle from one extreme position to the other extreme. Normal chip continuous turn potentiometer, multimeter meter needle resistance value should be from the nominal resistance (or 0 Europe) continuous change to 0 Europe (or nominal resistance). The whole process of rotation, hands need to change smoothly, and should not have any beating phenomenon. If in the process of adjusting the resistance value, the needle has a beating phenomenon, then the potentiometer there is a bad contact failure. Horizontal blue and white adjustable resistance detection method and the same.