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Feb 15, 2021
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How to change the micro USB connector with a soldering iron without a hair dryer

In service centers for the repair of phones, micro-USB connectors are changed with a soldering hairdryer. It is the most suitable tool for this type of work. If you decide to replace it yourself, then most likely you only have a regular soldering iron available. You can also change the connector using it, but this requires knowing a couple of tricks.

How to change the micro USB connector with a soldering iron without a hair dryer

What you need:

  • soldering iron with interchangeable tips of different sizes;
  • flux-containing lead solder;
  • ordinary solder;
  • flux gel RMA 223 or NC-559;
  • copper braid to remove solder;
  • degreaser.

Micro USB replacement process

A flux is applied to the connector pins.

How to change the micro USB connector with a soldering iron without a hair dryer

Next, you need to melt the solder at all points at the same time. To do this with a soldering iron, you need to warm up the connector in the center with a large sting. Then flux-containing lead solder is applied to all contacts. It will mix with the existing one, as a result of which the melting point of tin on the board will decrease.

How to change the micro USB connector with a soldering iron without a hair dryer

How to change the micro USB connector with a soldering iron without a hair dryer

For better heating, it is better to apply lead solder to the center of the connector, then everything will melt evenly, and the part can be removed with tweezers.

How to change the micro USB connector with a soldering iron without a hair dryer

Next, you need to clean the mounting holes on the board to solder the new connector. To do this, a copper braid moistened with flux is applied to them. The holes are heated through it, as a result all the solder tainted with lead is absorbed between its wires.

How to change the micro USB connector with a soldering iron without a hair dryer

How to change the micro USB connector with a soldering iron without a hair dryer

The contacts are wiped with a degreaser to erase the spent flux.

How to change the micro USB connector with a soldering iron without a hair dryer

Next, the connector is installed. All connections are covered with flux. After that, large contacts are alternately soldered with the same sting, and small ones with a thin tip. The latter are very small, so it is better to solder them under a microscope or magnifying glass.

How to change the micro USB connector with a soldering iron without a hair dryer

How to change the micro USB connector with a soldering iron without a hair dryer

How to change the micro USB connector with a soldering iron without a hair dryer

How to change the micro USB connector with a soldering iron without a hair dryer

After soldering, the flux is washed off, then the phone is assembled back to connect the display if it was removed. After that, you can already check the functionality of the connector both when charging is turned on and when connected to a computer.

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