1. Understand the circuit principle and determine the maintenance plan: when the electrical system of a piece of equipment is defective, do not rush to disassemble it, first of all, it is necessary to understand the phenomenon, process, planning and cause of the defect of the electrical equipment. Understand the fundamental operating principle of the equipment and electrical system, and analyze each specific circuit. Find out the contact between all levels of the circuit and the ins and outs of the signal in the circuit, combine the actual experience, after careful consideration, determine a scientific maintenance plan.
2. First machine loss, then circuit: electrical equipment is based on electrical and mechanical principles, especially the advanced equipment of mechatronics, mechanical and electronic organic cooperation in function, is a whole two parts. Often the mechanical parts are outdated, affecting the electrical system, equipment management, and the function of many electrical components does not work. Therefore, do not be tempted by superficial phenomena, the defects in the electrical system are not all electrical problems, but may be caused by defects in mechanical components. Therefore, first overhauling the defects of the mechanical system, and then cleaning the defects of the electrical part, often receives twice the result with half the effort.
3. First brief, then messy: repair defects should first be dealt with with in the most simple and easy, the best way to deal with them, and then use messy and accurate methods. When cleaning for defects, first clean for intuitive, obvious, and briefly common defects. After cleaning is difficult, the problem defect has not been dealt with.
4. Overhaul common problems first, and then ask for miscellaneous diseases: Electrical equipment often briefly occurs the same type of defects, which is a "common disease". Because common diseases are more common, the experience of accumulation is richer, so it can be cleaned quickly. In this way, you can concentrate on cleaning up the rare, difficult, and strange problems, simplify the process, narrow the planning, and move forward the speed of maintenance.
5. External debugging first, then internal processing: external refers to various switches, buttons, sockets and indicator lights exposed to the outside of the end seal of electrical equipment. Internal refers to the printed circuit boards, components and various connecting wires inside the shell or seal of electrical equipment. External debugging first, and then internal processing, that is, without disassembling the electrical equipment, use the switches, travel buttons, buttons, etc. on the electrical equipment panel to debug and inspect to reduce defect planning. First of all, clean the defects caused by the external parts, and then repair the defects in the machine, and try to avoid unnecessary disassembly
6. First do not power on the measurement, then power on the test: First of all, in the case of no power, the electrical equipment is overhauled: and then in the case of power, the electrical equipment is overhauled. When overhauling many defective electrical equipment, it cannot be energized immediately, otherwise it will artificially expand the defect planning, incinerate more components, and cause undue loss. Therefore, before the defective machine is energized. The resistance should be measured first, and the necessary measures should be taken before the power can be turned on for maintenance.
7. First common circuit, then special circuit: any electrical system common circuit defects, its energy, information can not be transmitted, allocated to the specific special circuit, the function of the special circuit, equipment management of the Chinese Alliance, the function of the function, the function of the Union, the function of the Union. If the power supply of an electrical equipment is defective, the whole system will not work normally, and the energy and information transmitted to various special circuits will not be completed. Therefore, by following the order of shared circuits first and then dedicated circuits, defects in electrical equipment can be cleaned quickly and accurately.
8. Summarize the experience. The defects of the forward power electrical equipment are all kinds and strange. After the overhaul of any defective electrical equipment, the defective phenomenon, causes, maintenance process, skills, and experience should be recorded in a special notebook, and learn to grasp the theoretical knowledge of various new electrical equipment, understand its operating principle, collect repair experience, and raise their experience into theory. Under the guidance of theory, specific defects are analyzed in detail, and the defects can be cleaned accurately and quickly. Only in this way can you train yourself to be an expert in repairing electrical defects.
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