... the solid sealing compound first, then clean it up. You may adopt other method as sol/hydrosol. ... avoid burning out the chip.FWhen achieving the set-up lamp temperature, Once the solder liquefied and melted, ... chip will be sold automatically.After cooling the chip, pick up the PCB board, check if it is ok. ... part which is being unsoldering, and it will up to the temperature in 3-5minutes. Then you ...