Circuit board cleaning maintenance methods

by:Rocket PCB     2020-06-09
Ordinary electronic products used in the long run, circuit board will be dirt, dust or air humidity is big, more will be corrosion and short circuit to circuit board composition, damage the components and circuit board, so if I found the dust on the circuit board is large, it is necessary to wash care. System board graphics card, sound card, network card and so on the precision of the circuit board are before they go out after cleaning disposal, the purpose is to remove consumption are attached on the PCB in the process of flux and hand sweat ( Is the consumption line all operator wearing gloves) Harmful substances, such as consumption about PCB manufacturer to wash the plate with special cleaning fluid ( Commonly known as the wash water) . Machine wash. About ordinary users, due to the limited conditions, cannot like circuit board manufacturers to operate, but just be careful when engaged in operation, careful earnest; Cleaning circuit board is not a difficult and frightening thing. 1, the preparation before cleaning cleaning before must including jumper wire on the circuit board, card board, batteries and IC, etc. All the connectors look out one by one pulled up, potentiometer, transformer and solenoid coil ( Inductance coil) Also must be removed from the circuit board, Note: the electronic professional personnel do not stop the operation, because if they do not have electronic professional technology, it is easy to damaged during disassembly parts and circuit board, fortunately, basically do not have these components on printed circuit boards computer-related] So once the element such as water, the cracks or line interturn droplets of water are difficult to squeeze gas purging out and water are difficult to dry, remove the necessary one by one, make records, to ensure the cleaning after the end of recovery from error. At the same time, by the way, could you check the circuit boards electrolytic capacitors can have the phenomenon of leakage or the top, if any, should be its discharge is divided, and make records, so that after the end of the circuit board liquidation changed into the equivalent of new product. About the computer power supply circuit board, the printed circuit should also be checked for welding plate and element between foot can have rare welding cracks, especially focusing on high power components, such as found a rare welding cracks, should be immediately repair welding, found a repair welding, otherwise easy to miss. 2, cleaning (1). At the same time with a clean soft brush (before cleaning 1 inch wide brush is good) And the pressure is about 0. 1Mpa[ Which is 1 kg per square centimeter] Monotonous squeeze air clean up dust on the circuit board. ⑵。 The special cleaning fluid of the circuit board cleaning can be used to wash ( Commonly known as the wash water) This liquid can be to specially store to buy. If not washed plate water, according to the following: ( Usually we don't have to wash the ordinary plate of water) First rinse with tap water, pay attention to the flow to be soft, not too hard, flushed the edge with a soft brush brush carefully, both sides of the circuit board are so. ⑶。 Then with a soft brush with neutral soap to seriously quietly every central cleaning circuit board, especially the jumper plug, socket, The CPU socket, AGP slot, PCI slot, memory slot) Inside and bottom of the bottom of the IC socket, north and south bridge chip, the BIOS chips and other under each of the IC chip, such as large capacity under central should be carefully cleaned and operation should pay attention to don't erect elements such as installation of small capacitance touch tilt; Assumption found it very dirty, wash the lather, wash with water, after, in scrub with soap again, until it is expanded to wash out by white. SSD PCB/PCB (4). Then rinse thoroughly with clear water slowly lifts the circuit board. Note: the required soap water washed clean thoroughly. ⑸。 Washing, after the end of pressure about 0. 1Mpa[ Which is 1 kg per square centimeter] Drab squeeze air to water, especially the jumper plug, socket, The CPU socket, AGP slot, PCI slot, memory slot) Inside and bottom of the bottom of the IC socket, north and south bridge chip, the BIOS chips and other under each of the IC chip, such as large capacity under central, but also from its different direction to suspend the purging, is trying to blow everything crevice water clean. Assume that do not have squeeze air, usable clock repair professional maintenance or camera professional rubber hand pump, but it can be tiring. ⑹。 A secondary distilled water or anhydrous alcohol will circuit board to wash it again ( Let the welding components side up, inclined with the circuit board, called with 10 ~ 12, clean oil paints with anhydrous alcohol from up to bottom to suspend the cleaning) 。 With carbon tetrachloride, its effect is more fine, but it is toxic, must be careful when using, unless necessary, otherwise please do not use. Ordinary are recommended not to use carbon tetrachloride. At this point, cleaning, and the end of this clean, clean thoroughly, not only save money, environmental protection and flourish. Due to the water washing board about harmful, say after washing liquid poured into the sewer, certainly not is a good thing. 3, with pressure about 0. 1Mpa[ Which is 1 kg per square centimeter] Drab squeeze air to water, especially the jumper plug, socket, The CPU socket, AGP slot, PCI slot, memory slot) Inside and bottom of the bottom of the IC socket, north and south bridge chip, the BIOS chips and other under each of the IC chip, such as large capacity under central, but also from its different direction to suspend the purging, is trying to blow everything crevice water clean. 4, after cleaning disposal circuit board must be thoroughly drab can only be put into use, there are many methods, can refer to the following method: (1). In air conditioning room, make its natural drying, took about more than 36 hours. ⑵。 With oven drying, drying oven temperature to 80 degrees Celsius, lasted about 24 hours. ⑶。 With the hair dryer ( Industrial specialized or household) Blow dry, this method should be hand hair dryer kept swinging, very tired! And improper technique that may drab uneven, especially those that the middle of the gap. 5, according to the removing components of record as the guidance, to remove the original one by one to recover. 6, check the installation can be qualified. Other equipment cleaning maintenance circuit board also may according to the above method.
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