IN UPS SYSTEMS OR CNC SYSTEMS(CNC M/C'S) NEEDS PREVENTIVE MAINTENANCE TO PCB'S(ELECTRONIC CARDS) i.e. clean the cards and keep dust proof why cards should be dust free?
2007-03-15 00:34:11 · 5 answers · asked by gopalsingh 1 in Science & Mathematics ➔ Engineering
In my 25 years experience as a service technician, dust build-up interferes with cooling air circulation. It acts as an insulating layer causing components to get warmer than they should be. Too much heat accelerates semiconductor breakdown.
2007-03-15 00:39:04 · answer #1 · answered by waynebudd 6 · 3⤊ 0⤋
dust on printed circuit boards can change resistance of the "wires" in the circuit (the copper lines) Also heavily soiled PCB can short out
2007-03-15 07:50:07 · answer #2 · answered by beano007 2 · 0⤊ 0⤋
Dust generally contains carbon which is a good conductor of electricity and it can lead to spark and may lead to short circuit. This will damage your costly equipments.
2007-03-15 07:43:44 · answer #3 · answered by suryanarayanan u 3 · 0⤊ 0⤋
Eventually current can arc across the dust, especially in humid conditions.
2007-03-15 07:37:45 · answer #4 · answered by Anonymous · 1⤊ 0⤋
Any substance has a resistance to current, therefore dust and other particles laying across traces can conduct current and throw off calibration and/or destroy circuitry.
2007-03-17 11:23:27 · answer #5 · answered by joshnya68 4 · 0⤊ 0⤋