15
③
Measure the MOSFET in the PCBA (Step 1)
a) Set the Multimeter function to “Diode measuring”.
b) Contact the red pen pin to the negative electric contact (the battery electric contact that
connects to black wire).
c) Contact the black 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, go to the next testing step, otherwise
means the PCBA is broken (When LCD displays both around 0.1V or 0L., the MOSFET are
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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