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e.) Soldering LED lights (matching the shape of the board), numbered D1~D18. (The square pad of circuit
board is positive, and the long pin of LED is positive
i.) First estimate the LED pin from which position to do 90° bending
ii.) After folding the pin, insert it into the corresponding hole (pay attention to the installation direction)
iii.) Bend the LED pin 90° in the correct direction and then solder it
The soldering of Board A is completed.
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