How to Clean Points and Connectors of Mobile Phone PCB

Learn How to Clean Points and Connectors of Mobile Phone when Repairing.

Here we will learn how to clean points and connectors of mobile phone PCB when repairing. When doing mobile cell phone repairing, you will often have to clean several points and connectors. Cleaning of points and connectors is done to clean and remove dirt and oxides from solder joints, PCB circuit tracks and the Mobile Phone PCB itself. These dirt and oxides (often copper oxide and carbon oxide) act as resistance and hindrance to flow of current thus affecting the performance of the mobile phone handset.

Mobile Phone PCB Diagram with Parts

Mobile Phone PCB Diagram with Parts

Tools Needed for Cleaning

You will need following mobile phone repairing tools:

How to Clean Points and Connectors of Mobile Phone PCB

  1. Disassemble the mobile phone and take out the PCB
  2. Fix the PCB to a PCB holder that can hold it firmly.
  3. Using a PCB cleaning bud or ESD-Safe Brush and IPA solution or PCB cleaner, clean the connectors, points and solder joints on the PCB.
  4. You can also use tweezers for cleaning.
  5. Similarly you can clean the whole PCB of the mobile phone and other parts and components in a mobile phone.

Have a look at following videos to learn and understand how to disassemble a mobile cell phone and repair.

Video: How To Clean Point & Connector of a Mobile Phone

How to Clean Points and Connectors of Mobile Phone PCB FAQs

You'll need isopropyl alcohol (99% pure), a lint-free cloth or cotton swabs, and a soft-bristled brush.

First, unplug your phone and remove the battery (if possible). Then, dip a cotton swab or lint-free cloth in isopropyl alcohol and gently wipe the points and connectors. Use a soft-bristled brush to remove any dirt or debris. Once done, let the phone dry completely before reassembling it.

No, water can damage the delicate electronic components on your phone's PCB. It's best to use isopropyl alcohol, which evaporates quickly and leaves no residue.

If cleaning the points and connectors doesn't resolve your connectivity issues, it's best to seek professional help. Attempting to repair the phone on your own could lead to further damage.

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Santosh Das

Santosh is an Electronics Geek, Blogger, Young Entrepreneur and Founder of this Mobile Phone Repairing Website. Santosh possesses vast experience in the field of electronics, telecommunication, Soldering, SMT, ESD Safety, Keep visiting for daily dose of Tips and Tutorials.

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4 Responses

  1. Lakhbir jandwala says:

    sir when I insert charger then mobile is not shown charger connected or disconnected. where is the fault . plz help

  2. Danu says:

    How to change the fault network ic and how to fix the new ic in mobile pcb

  3. raghu says:

    i hv frgtd my security code hw to identity fie the code

    • Santosh Das says:

      You will have to unlock the security code using software. Take your phone to any mobile phone repairing shop.

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