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Water Damage Repair on Your Google Nexus Unit Using an Ultrasonic Cleaner

The Samsung Nexus S is perfect for outdoor use with 75% less glare on its display and its 3D Google Maps 5.0 navigation system. The unit is packed with a 1 GHz Hummingbird processor and a 16 GB internal memory making it one of the fastest phones in the market. With its Graphics Processing Unit (GPU), the Nexus S is ready for web browsing, mobile gaming and other applications. Maintenance is highly important to enjoy all these specs through cleaning the printed circuit board (PCB) by an ultrasonic cleaner.

Google Nexus units can take a lot of abuse including being left out in the rain, dropped in the soup or otherwise rendered inoperable. Unless your Google Nexus is irreparably damaged, it can most likely be restored to operation in an ultrasonic printed circuit board cleaner. With the same technology used by printed circuit board manufacturers, ultrasonic circuit board cleaning quickly and safely removes contaminants from the delicate components in your Google Nexus.

Here you will learn:

  • How an Ultrasonic PCB Cleaner Works
  • How to Select and Set Up your Circuit Board Cleaner
  • How to Disassemble, Clean and Reassemble your Google Nexus

How Ultrasonic PCB Cleaners Work to Restore Your Google Nexus

Ultrasonic machines are used in a wide range of applications to remove virtually any soil or contamination by using the power of cavitation action. This is the term used to describe the implosion of billions of minute bubbles contacting Google Nexus PCB components and surfaces. The bubbles are created by generator-powered ultrasonic transducers bonded to an ultrasonic cleaning tank and typically operate at an ultrasonic frequency of 37 to 42 kHz (37,000 to 42,000 cycles per second).

When the bubbles implode contaminants are quickly and safely removed from PCB surfaces without damaging delicate parts. So tiny are the bubbles that they penetrate minute cracks, crevices and blind holes that might lodge dried residue, dust and dirt particles. The ultrasonic PCB cleaning system will complete the job in as little as 10 to 15 minutes. And it will do it in an environmentally friendly manner because the ultrasonic circuit board cleaning solution formula is a biodegradable concentrate that minimizes disposal problems.

How to Select and Set Up your Google Nexus Circuit Board Ultrasonic PCB Cleaner

Ultrasonic cleaners come in a variety of sizes from bench top units to a floor-mounted industrial ultrasonic cleaning machine, so you can select any size you need. Our most popular models for cleaning Google Nexus circuit boards are the ¾ gallon Elma EH075EL and 1½ gallon Elma EH150EL. You should select an ultrasonic PCB cleaner equipped with a frequency sweep function, such as an Elma model, to prevent damage to sensitive components during cleaning. Choose a heated ultrasonic cleaner model to improve the ultrasonic cleaning process.

Whatever the model and size of ultrasonic circuit board cleaner you use there are steps to take before cleaning begins.

  1. Fill the ultrasonic cleaner tank to the fill line (or approximately 2/3 full) with ultrasonic cleaning solution such as Elma tec clean A1 diluted 1:20 with water.
  2. Turn on the ultrasonic cleaner, set the heater to approximately 50°C, and operate for about 30 minutes to drive off cavitation inhibiting entrained air. Degassing is complete when bubbles stop coming to the surface and must be performed every time the tank is filled with fresh circuit board cleaning solution.

How to Disassemble, Clean and Reassemble your Google Nexus

Step 1: Disassembling your Google Nexus

Remove the back cover of the phone. To do this use your fingernail or a plastic opening tool to pry off the whole cover. You should now see the battery and the connectors. With the help of a plastic opening tool, peel the NFC antenna module off from the back cover. It is important that you do not damage this part.

Pull the battery up using your fingernail, and remove it. Remove the six screws connecting the device, with the help of your screwdriver. Again using your safe pry tool, it is time to loosen the inner case from the back case. You should now see your Google Nexus circuit board.

Three tiny black screws need to be removed. These are found at the upper area of the device. You will need to separate the SIM card holder from the circuit board. Once this is is done, you may gently lift the circuit board. It should come out easily.

You now hold in your hand your Google Nexus circuit board.

Congratulations! You have successfully removed your circuit board from your Google Nexus! You may now proceed with the next step.

Step 2: Cleaning the Printed Circuit Board

Set the PCB ultrasonic cleaner’s thermostat to 50°C and activate the Sweep mode. While the solution is heating, place your PCB in the basket. If you are cleaning more than one at a time take care that they do not touch each other. Once the operating temperature is reached lower the basket into the cleaning solution and set the timer for 10 minutes. Cleaning time depends on the condition of the PCBs and may have to be adjusted.

At the end of the cycle remove the components from the bath. If they are not clean replace them in the bath until the cleaning is complete. Then rinse them in distilled or deionized water to remove all traces of the cleaning solution and avoid water spotting. Dry them with an air blower or warm air dryer.

Safety note: DO NOT reach into operating ultra sonic cleaners. Instead remove the basket if you want to inspect or rearrange the parts.

Step 3: Reassembling your Google Nexus

To return your Google Nexus, attach the SIM card holder to the circuit board. You can use your fingers or a plastic opening tool for this. Return the circuit board to its original position. Make sure to screw the circuit board back on. This is done by tightening the three black screws, using a tiny screwdriver. Make sure that everything stays in place.

Next, return the inner case to your phone’s body. You should re-attach the case with six screws. Secure and tighten them once again so that the inner case stays in place.

Once secured, you may now return the battery to its original position on your Google Nexus. Secure the NFC antenna module once again. Do this gently so antenna module of the phone will not be damaged. If damaged, this may cause problems with signal reception.

Return the back cover and make sure it snaps in place.

Admire the piece of work you just put back together.

Voila! Start your device and your Google Nexus should be good to go.

More Operating Tips

Any contaminants that rise to the surface of the bath should be skimmed off and disposed of properly. When the circuit board cleaning solution becomes discolored or cleaning takes longer it is time to replace it. Drain the tank and dispose of the spent solution according to local regulations. Take the time to remove any material that settled to the bottom of the tank. Clean the tank using an ultrasonics cleaning process recommended by the manufacturer.

Questions: Contact the iultrasonic ultrasonic cleaning experts at 973 821-4400

Disclaimer: This advice is not provided by a licensed technician. Follow at your own risk. We assume no liability for any damages caused by following the advice in this article.


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