Traduciendo paso 2
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Measure circuits that are related to the speaker on the charging port connector. Turn the phone off. Detach the motherboard. Run diode mode measurement of the pin 1, pin 3, pin 5, and pin 45 on the J6400. The diode values are normal.
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Then we need to separate the motherboard for further testing. Cut through the shielding paper with a Sculpture Knife. Heat the motherboard on the Heating Platform at 165℃. When the temperature has risen to 165℃, remove the logic board and signal board.
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Attach the signal board to the holder. Smear rosin with Soldering Iron at 365℃ and solder wick to remove tin on the bonding pad. Remove tin on the bonding pad of the logic board with the same method.
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