1) Remove the connection cable connector of the specification potentiometer from the speed
measuring PCBA of the HP-30.
2) Remove the five pressping screws (2).
3) Take down the clamping piece pressing plate (3) of the HP-30, and take down the
specification potentiometer (1) together with cables.
Note: When dismantling the specification potentiometer, protect the slide handle of the
potentiometer.