Preparation before Cleaning
Before initiating the cleaning process, each connector on the circuit board, including jumpers, card boards, batteries, and ICs, must be carefully unplugged one by one. Additionally, potentiometers, transformers, and solenoid coils (inductance coils) should be detached from the circuit board. [Note: Individuals without electronic expertise should refrain from undertaking this operation, as mishandling may result in damage to the components and circuit boards during disassembly. Fortunately, circuit boards related to computers typically lack these components.]
Consequently, when water infiltrates the components, water droplets lodged in crevices or between windings become challenging to dislodge with compressed air, and moisture removal becomes arduous. Disassembly procedures must be meticulously documented to ensure error-free reassembly post-cleaning. Simultaneously, inspect whether any electrolytic capacitors on the circuit board exhibit signs of leakage or bulging at the top. If so, remove and mark these capacitors for replacement with equivalent value products after cleaning the circuit board.
For computer power supply circuit boards, it is imperative to inspect for cracks or desoldering between the pads of the printed circuit and component terminals, especially among high-power components. Any identified cracks or desoldering should be promptly rectified. Addressing cracks immediately upon detection is crucial to prevent oversight of these vulnerabilities.
Cleaning Method
1. Prior to cleaning, employ a clean, soft paintbrush (preferably one inch wide) and dry compressed air at approximately 0.1 MPa (equivalent to 1 kg/cm2) to eliminate dust from the circuit board.
2. Utilize a specialized cleaning fluid (commonly referred to as board washing water) for circuit board washing during the cleaning process. This fluid is typically obtainable from specialized stores. In the absence of board washing water, the following method can be employed: rinse with tap water initially, ensuring a gentle water flow, and concurrently brush cautiously with a soft brush during rinsing. Repeat this process for both sides of the circuit board.
3. Subsequently, meticulously cleanse each part of the circuit board, particularly jumper plugs, interior and underside of slots (CPU slot, AGP slot, PCI slot, memory slot), bottom of the IC socket, north-south bridge chip, BIOS chip, and base of each IC chip, as well as the bottom of large capacitors, using a soft brush with neutral soap. Exercise caution not to touch upright-installed small capacitors and other components during operation. If the soap foam becomes heavily soiled, rinse with clean water and repeat the soap scrubbing until the foam turns white.
4. Thoroughly rinse the circuit board with clean water, ensuring complete removal of any soapy residue.
5. Following rinsing, utilize dry compressed air at approximately 0.1 MPa (1 kg/cm2) to blow away water droplets, paying particular attention to jumper plugs, slots (CPU slot, AGP slot, PCI slot, memory slot), IC socket bottom, north-south bridge chip, BIOS chip, base of each IC chip, and bottom of large capacitors. Direct the airflow from various angles to dislodge any water droplets trapped in crevices. In the absence of compressed air, a rubber hand pump designed for watch and camera repair professionals may be used, although it may require considerable effort.
6. Conduct an additional wash of the circuit board using double distilled water or anhydrous alcohol. Position the side with soldered components facing upwards, place the circuit board diagonally, and utilize a clean oil paintbrush (size No. 10 to 12) dipped in anhydrous alcohol to clean from top to bottom. Carbon tetrachloride, while more effective, is toxic and should be handled with extreme caution. Its use should be limited to situations where absolutely necessary, with its general use discouraged.
With the completion of this cleaning process, not only are the boards thoroughly cleansed, but resources are conserved, and the approach remains environmentally friendly and health-conscious.
As a professional FPC soft board manufacturer, WellCircuits Limited is honored to have collaborated with many of you. At WellCircuits Limited, we stand prepared to assist our new customers in any capacity. Please do not hesitate to reach out to us with any inquiries.
Before initiating the cleaning process, each connector on the circuit board, including jumpers, card boards, batteries, and ICs, must be carefully unplugged one by one. Additionally, potentiometers, transformers, and solenoid coils (inductance coils) should be detached from the circuit board. [Note: Individuals without electronic expertise should refrain from undertaking this operation, as mishandling may result in damage to the components and circuit boards during disassembly. Fortunately, circuit boards related to computers typically lack these components.]
Consequently, when water infiltrates the components, water droplets lodged in crevices or between windings become challenging to dislodge with compressed air, and moisture removal becomes arduous. Disassembly procedures must be meticulously documented to ensure error-free reassembly post-cleaning. Simultaneously, inspect whether any electrolytic capacitors on the circuit board exhibit signs of leakage or bulging at the top. If so, remove and mark these capacitors for replacement with equivalent value products after cleaning the circuit board.
For computer power supply circuit boards, it is imperative to inspect for cracks or desoldering between the pads of the printed circuit and component terminals, especially among high-power components. Any identified cracks or desoldering should be promptly rectified. Addressing cracks immediately upon detection is crucial to prevent oversight of these vulnerabilities.
Cleaning Method
1. Prior to cleaning, employ a clean, soft paintbrush (preferably one inch wide) and dry compressed air at approximately 0.1 MPa (equivalent to 1 kg/cm2) to eliminate dust from the circuit board.
2. Utilize a specialized cleaning fluid (commonly referred to as board washing water) for circuit board washing during the cleaning process. This fluid is typically obtainable from specialized stores. In the absence of board washing water, the following method can be employed: rinse with tap water initially, ensuring a gentle water flow, and concurrently brush cautiously with a soft brush during rinsing. Repeat this process for both sides of the circuit board.
3. Subsequently, meticulously cleanse each part of the circuit board, particularly jumper plugs, interior and underside of slots (CPU slot, AGP slot, PCI slot, memory slot), bottom of the IC socket, north-south bridge chip, BIOS chip, and base of each IC chip, as well as the bottom of large capacitors, using a soft brush with neutral soap. Exercise caution not to touch upright-installed small capacitors and other components during operation. If the soap foam becomes heavily soiled, rinse with clean water and repeat the soap scrubbing until the foam turns white.
4. Thoroughly rinse the circuit board with clean water, ensuring complete removal of any soapy residue.
5. Following rinsing, utilize dry compressed air at approximately 0.1 MPa (1 kg/cm2) to blow away water droplets, paying particular attention to jumper plugs, slots (CPU slot, AGP slot, PCI slot, memory slot), IC socket bottom, north-south bridge chip, BIOS chip, base of each IC chip, and bottom of large capacitors. Direct the airflow from various angles to dislodge any water droplets trapped in crevices. In the absence of compressed air, a rubber hand pump designed for watch and camera repair professionals may be used, although it may require considerable effort.
6. Conduct an additional wash of the circuit board using double distilled water or anhydrous alcohol. Position the side with soldered components facing upwards, place the circuit board diagonally, and utilize a clean oil paintbrush (size No. 10 to 12) dipped in anhydrous alcohol to clean from top to bottom. Carbon tetrachloride, while more effective, is toxic and should be handled with extreme caution. Its use should be limited to situations where absolutely necessary, with its general use discouraged.
With the completion of this cleaning process, not only are the boards thoroughly cleansed, but resources are conserved, and the approach remains environmentally friendly and health-conscious.
As a professional FPC soft board manufacturer, WellCircuits Limited is honored to have collaborated with many of you. At WellCircuits Limited, we stand prepared to assist our new customers in any capacity. Please do not hesitate to reach out to us with any inquiries.
