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2. Test the PCBA to judge if it is broken.
①
Discharge the capacitor that is connected in the PCBA
a) Multimeter can be used for discharging.
With the Multimeter function set to “Ω”,
get through the two terminals of the
battery electric contacts, with black pen
pin contacted to the negative
terminal(black wire) and red pen pin
contacted to positive terminal(red wire),
press down the main switch (Yellow circled
indicated).
b) When the value displayed is 0L., the
discharging process is finished.
How to Detect the PCBA and the Motor
Main Switch
Press down the main
switch and then measure
the two terminals of the
battery electric contacts
as picture shown.
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