Electronic circuit trouble shooting method [welding debugging]
Update date：2012-7-10
Whether in life or in the debugging of the product, basic will meet to change a component or board can not start, the board failure, how quickly troubleshoot it? This is a manifestation of the work of the engineers, the speed and capacity, and summed up for all learning together.
A board, sometimes change the components can be solved, sometimes like a patient, a variety of disease, the condition is complex, step by step, to judge, this time is the comprehensive diagnosis, specific applications should be several ways to used in conjunction in order to accurately detect the fault, then you can troubleshoot.
(1) When a component in the circuit is damaged, you can remove it replaced with new components to replace components: try to choose the specifications of the same model components replaced. If there is no opposite of the components should be carried out for different components.
(2) the phenomenon of poor contact of the components or parts can be cleaned, it can be repaired, the use of pure alcohol cleaning components and parts to clear the fault.
(3) for unstable failure phenomena, such as sound, sometimes no, sometimes big, sometimes small, mostly due to false welding. Electric iron have a choice, purpose, and focus on re-weld some solder joints, exclude Weld can solve the problem.
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