During the overhaul process, the maintenance personnel may disassemble and replace the casing, circuit board, and some damaged components of the electronic product. Pay attention to the following points when disassembling and replacing:
1) Do not blindly dismantle 1 can not blindly disassemble, should be clear whether it is external or internal reasons before deciding whether to disassemble, should be targeted, mindful, in order to avoid wasting time and expand the fault.
2 Do not blindly disassemble components to avoid damage to components and cause new malfunctions.
3 When disassembling, make corresponding records, can not lose and confuse various parts, can not mistake the components and the installation position and direction of the wires.
4 Can not be blindly adjusted, should make a corresponding record when adjusting, should be adjusted back to the original position when there is no effect on the fault.
5 When loading and unloading and adjusting, the force should be appropriate, and should not be pulled, pulled and twisted.
2) Avoid short circuit 1 The work surface or the bottom plate should be kept clean and tidy. Do not place tools or components at random to avoid short circuit.
2 Avoid overcoming components and discarded solder, wires or other debris on the board during maintenance.
8 Safety and insulation should be ensured during live operation. When using a multimeter to measure, the force of holding the test pen should be appropriate to avoid short circuit caused by the slip of the test lead.
3) Component replacement and substitution When the component is replaced and replaced, the new device should be identical to the component specification and model. When there is no replacement component of the same type, the components with the same performance or similar performance can be replaced. Maintenance personnel should be familiar with the replacement of components at home and abroad, and prepare spare parts.
4) Process problems Manufacturers in the production process from component screening, aging to the assembly and commissioning of the whole machine are strictly in accordance with the process rules. The maintenance process should be carried out as much as possible in accordance with the original process requirements. Strictly prevent welding, it is strictly forbidden to use flux, and the thread and welding slag should not be dropped into the machine (http:// copyright) to avoid unnecessary trouble or loss.
5) Warranty period During the warranty period, the weld should not be removed at will, in order to check the responsibility. If it is necessary to repair, you need to explain the reasons to the user or ask for approval from the supervisor.
6) Pay attention to the economic benefits The repair process should consider economic benefits and comprehensively measure the gains and losses. When repairing, we should balance the cost of materials, working hours and use value, and adhere to the principle of value for money. If the consumption in the repair is too large and the value after repair is not large, it is recommended to scrap.
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