Using alcohol to clean a circuit board is a common maintenance method that effectively removes surface stains and grease, enhancing the reliability and performance of the board. Below are detailed steps for cleaning a circuit board with alcohol:

Tools and Materials Preparation:

1. Alcohol: Recommended to use alcohol with a purity of 90% or higher, such as anhydrous ethanol, for better cleaning effectiveness.

2. Cotton Swabs or Clean Cloth: Used for local cleaning or wiping the circuit board.

3. Anti-static Wrist Strap: Wearing an anti-static wrist strap prevents static electricity from damaging the circuit board when handling.

4. Hair Dryer or Clean Towel: For drying the circuit board.

5. Discarded Circuit Board or Safety Container: Used to store the alcohol and other liquids during the cleaning process.

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Operational Steps:

1. Preparation:

• Place the circuit board to be cleaned on a safe workbench, ensuring a dry and dust-free environment. Have cotton swabs, alcohol, and anti-static wrist strap ready for immediate use.

2. Local Cleaning:

• Use a cotton swab dipped in alcohol to gently wipe the surface of the circuit board's connectors, sockets, and component surfaces, especially the pins. Avoid liquid entry into the circuitry.

3. Comprehensive Cleaning:

• Immerse the circuit board in prepared alcohol, ensuring every part of the board contacts the alcohol. The soaking time can vary but typically stays between 1-2 minutes. Then, lightly brush the board's surface and edges with a soft-bristle brush to remove stains and grease.

4. Rinsing and Drying:

• Remove the circuit board from the alcohol and rinse it thoroughly with clean running water to remove residual alcohol and other stains. Then, use a clean cloth or a hairdryer to completely dry or blow-dry the circuit board. Ensure the board is completely dry before proceeding.

5. Inspection and Testing:

• Inspect the circuit board for damages or soldering issues. If necessary, re-solder or repair. After ensuring everything is in order, proceed with testing to confirm the board's functionality.

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Precautions:

• Handle the circuit board delicately to avoid damaging it by applying excessive force.

• Maintain good ventilation during cleaning to avoid inhaling harmful gases or liquids.

• Adhere to the sequence of soaking before rinsing during the cleaning process to ensure effectiveness and safety.

• Follow safety regulations and operational procedures when using alcohol or other chemical agents to ensure personal safety and environmental hygiene.

• Seek professional assistance or guidance for uncertain or hazardous circuit boards.

In conclusion, using alcohol to clean a circuit board is a simple and practical maintenance method that helps improve the board's reliability and performance. Follow safety regulations and operational procedures to ensure personal safety and environmental hygiene. Seek professional assistance or guidance if needed.