- 1). Turn off and unplug the saw and wait for 10 to 15 minutes to ensure all residual charges stored in the capacitors have drained.
- 2). Remove the access panel to the electrical circuitry of the saw. On most models this section will be incorporated into the push button start/stop housing, usually connected just before the starter relay.
- 3). Connect the tip of the negative black probe lead from the capacitance meter to the shorter of the two terminals coming out of the capacitor. If the terminals are of the same length then it is not polarized, and the black lead can be connected to either terminal.
- 4). Connect the tip of the positive red probe lead to the other of the two terminals on the capacitor.
- 5). Read the rating printed on the casing of the capacitor. This will most likely be in uF (micro Farad), pF (pico Farad), or nF (nano Farad).
- 6). Set the dial on your capacitance meter to one higher level than the printed value on the capacitor. For example, if the capacitor was labeled 470uF and your meter had a setting for 200uF and 2000uF, you will need to set it to the higher 2000uF setting to get an accurate reading.
- 7). Read the value on the screen of your meter. If this value is within 10 percent of the value printed on the capacitor, then it is working properly. If the value on the meter differs by more than 10 percent from the printed value, the capacitor should be replaced with a properly functioning replacement.
SHARE
