Mar 16, 2020|General

Circuit boards run a lot of processes in our devices, and they can often contribute to speed and performance. If a board is dirty, that can cause overheating and other issues. Thankfully, you don’t need to be a tech expert to get your device back into working shape.

Read on for your complete guide to how to clean a circuit board!

How Do Circuit Boards Get Dirty?

Circuit boards rest inside many pieces of equipment, but they’re not wholly safe from dust and debris. Gaps in the machine can ultimately let dirt inside on their own. Additionally, the fans present in many larger devices to prevent overheating can also draw debris from the air to the inside of a machine, where it can come to rest on a circuit board.

Discover the answer to “What is PCB?

Circuit Board Sunset by OllyTrolly is licensed under CC BY-SA 2.0

Different Types of Contaminants

Dry Contaminants – Dust and dirt are the most common dry contaminants, as they often exist in the air or nearby surfaces. These tend to be easier to clean.

Wet Contaminants – Unlike their dry counterparts, wet messes like grime, flux, waxy oil, and soda require different cleaning approaches.

Dirty Keys by dobharrison is licensed under CC BY-NC-SA 2.0

Safety & Prevention with Circuit Boards

When handling a circuit board, you need to be careful with it so that you don’t cause any more damage in the process of cleaning it. Some best tips to follow are:

1. Fully disconnect a device from its power source before removing it.

2. Keep your clothes dry

3. Avoid any water while cleaning

4. Wear gloves and goggles if using alcohol to clean

circuit-back by martingautron.com is licensed under CC BY-NC 2.0

How to Clean a Circuit Board

Many circuit board messes don’t need more than compressed air to clean out dry contaminants like dirt and dust. For more persistent messes, you can use distilled water and a soft brush or a cleaner like baking soda to help break down messes without damaging the board itself.

For best results with all circuit board cleaning methods, you’ll likely need to use a screwdriver to open up the device to get better access to the circuit boards.

With all that in mind, follow these methods for how to clean a circuit board strip.

1. Compressed Air – For regular maintenance of a circuit board, get a can of compressed air and spray it inside the ventilation ports of your device to help clear away dust and debris. If you think you need to clean further, open up your device to get better access to the board.

2. Baking Soda – The sodium bicarbonate in baking soda helps to break down grime and corrosion build up on a dirty PCB (printed circuit boards) without causing damage to the circuit board.

3. Isopropyl Alcohol – Likewise, you can use isopropyl alcohol to break down sticky debris. Ninety percent or higher alcohol works best, as it dries quickly. When handling this material, you should wear gloves and goggles for protection. When and how to clean a circuit board with alcohol will depend on the mess you’re handling.

4. Distilled Water – When trying to make a circuit board cleaning solution, you should use distilled water, since it doesn’t damage electronics while cleaning. However, be sure to keep the water safely stored, as it can become contaminated.

5. Household Cleaners – If the other materials on this list don’t work for you, household cleaners can serve as a circuit board cleaner spray. If you use one, though, make sure it’s phosphate-free, as phosphates can damage circuitry.

Member’s Mark 91% Isopropyl Alcohol (32 Fl. Oz, 2 pk.) by featanlihon is licensed under CC0 1.0

Tools to Clean a Printed Circuit Board

Aside from a printed circuit board cleaner, you’ll also need an extra tool to help wipe away and brush off debris.

1. Lint-Free Towels or Microfiber Cloths – For doing a quick wipe up of a cleaning solution, towels can work well. They must be lint-free or microfiber so that there’s less risk of leaving behind debris in your device.

2. Soft Bristles Brush or Paintbrush – Small brushes work well for getting into small gaps in microwave circuit boards. However, always make sure the bristles are weak so that you don’t risk scratching the circuits.

3. Oven, Blow Dryer, or Desk Lamp – While the cleaning solutions we’ve mentioned above can help clear away debris, some of them can leave behind liquids. To prevent damage to your board, use a source of heat to dry them off quickly. This approach is essential when following steps for how to clean electronic circuit boards.

how I clean water damaged phones by kikuyumoja is licensed under CC BY-NC-SA 2.0

What Causes Corrosion in Circuit Boards?

Corrosion happens over time as the metals in the circuit board react to chemicals in their environment. (Learn more about what are PCB made of.) Liquids can also cause corrosion if not dried off from metal. Rust is the most common result, but others exist as well. While a small amount of rust can make a circuit board less conducive to short-circuiting, corrosion will eventually cause enough damage to create a device break down.

Bristol Flickrwalk by qwertyuiop is licensed under CC BY-NC-SA 2.0

Tips to Clean Corrosion From a Circuit Board

When it comes to how to clean a circuit board of corrosion, you’ll want to follow more specific steps to get your circuit board into top shape safely.

1. Disassemble Your Device – To start, you’ll need to disassemble your device to access the circuit board. In most cases, you can accomplish this with a screwdriver. You will also want to disconnect any cables or chips from the board. It can help to take pictures of the device to ensure easier reassembly.

2. Combine Baking Soda and Distilled Water – This will be your PCB cleaner solution. You’ll need about ¼ a cup of baking soda and one or two tablespoons of water and mix until you have a thick paste.

3. Clean with Your Brush – Using your soft-bristled brush, start to clean with your solution. Apply it to all corroded areas and let it sit for twenty to thirty minutes to dry.

4. Rinse Away the Paste – After your circuit board cleaner solution has dried, wash it away with distilled water.

5. Apply Household Cleaner – Spray the circuit board with your household cleaner and let it sit for around ten to fifteen seconds. Use your clean and soft brush to clean away any remaining corrosion.

6. Clean Off – Using a lint-free or microfiber towel, gently dab away any remaining debris or moisture. Be careful not to wipe it down, as this can cause scratches.

7. Dry – Set your oven to 170 degrees Fahrenheit and let it reach the temperature. Then, turn off the oven and set your clean circuit board inside for roughly three hours to dry any leftover moisture. When done, reassemble your device!

How to clean a corroded circuit board does take more care than regular dust maintenance, but you can expand its longevity with these methods.

Asus K52JE by davispuh is licensed under CC BY 2.0

How to Clean a Circuit Board That Got Wet

To prevent corrosion, you should clean a circuit board shortly after it gets wet. To do so, you’ll need:

* A Container

* Isopropyl Alcohol or Distilled Water

* Soft Bristled Brush

* Blow Dryer or Desk Lamp

After disassembling the device, you’ll want to set your circuit board in a container and submerge it with either isopropyl alcohol or distilled water. After letting it rest for a short time, remove the board and use your brush to clean away any grime that had formed. Afterward, you’ll want to dry it off. You can use a blow dryer on its lowest setting or the light of a desk lamp to clear away any moisture.

Before assembling the device again, check for any damage to the battery. If it looks discolored or disfigured, you should replace it.

dyson LightCycle Desk Lamp by TheBetterDay is licensed under CC BY-ND 2.0

Conclusion

While messy circuit boards can cause a lot of trouble for your devices, they’re thankfully easy to learn how to clean a circuit board on your own. With the right supplies and a little patience, you’ll be able to complete your PCB cleaning. We hope that our guide has been helpful to you!

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