③ IF the speed-adjusting PCB is broken, disconnect it from the wires and replace with a new
one by resoldering.
④ If the speed-adjusting knob is also broken, replace it with a new one.
NOTICE: Mind soldering sequence as Fig. 1 show.
19
Self-propelled
Speed-adjusting
PCB
1
Self-propelled
Speed-adjusting
Knob
2
Description Part Number
Self-propelled Speed-adjusting
Knob
3127930001
6. The Main Switch/Self-propelled Switch/Speed- adjusting PCB
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