17
④
Measure the MOSFET in the PCBA (Step 2)
a) Keep the Multimeter function setting at “Diode measuring”.
b) Contact the black pen pin to the positive electric contact (the battery electric contact that
connects to red wire).
c) Contact the red pen pin to the three connectors separately and measure each voltage (see next
slide).
d) If the LCD displays 0.45~0.55V for each measurement, all the MOSFETs in the PCBA are good,
namely the whole PCBA is good, otherwise means the PCBA is broken.
e) Follow the procedures in “Replace the PCBA” to replace a new PCBA.
How to Detect the PCBA and the Motor
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