EGO LB5300E Repair Manual Line page 17

How to disassemble the blower
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 metal plate that connects to black
wire).
c) Contact the black pen pin to the three
connectors separately and measure the voltage.
d) If the LCD displays 0.45~0.55V for each
measurement, go to the next testing step,
otherwise means the PCBA is broken. Follow
the procedure "How To Replace the PCBA" to
replace a new PCBA.
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