Some necessary conditions:
1. Technology
Technology is to analyze a bad motherboard based on signals and circuit principles (or related datasheets) and make correct judgments between the expected value and the measured value. This depends on personal rich work experience, learning ability, observation ability, testing experience and inference ability of problems.
2. Instruments
In front of motherboard analysis, we face various electronic parts. Their combination or logic, the most common manifestations are voltage, frequency, waveform, and impedance. In order to obtain the accurate parameters of these circuits, corresponding measurement instruments must be provided. The quality of the instrument will of course determine whether the inference is correct or not. Without instrument analysis, you will never have the ability to explore problems yourself, and you can only rely on other people's experience sharing. Although there is Top Issue among various electronic products, there is no reason to say that the same part will always be broken. It is precisely because of this that when dealing with different problems, a variety of instruments and tools are needed. The resistance value card type is to speed up the working progress and solve some points that cannot be detected without drawings. Oscilloscopes and meters are used to present an electrical parameter.
3. Materials
Before finding the problem with sufficient understanding and problem analysis, you still need to have enough materials (chipset, power supply IC, MOSFET, functional chip, Flash ROM) to replace the potential defective products you suspect.
4. Equipment
When the materials and fault points are met, some parts cannot be solved with commonly used ferrochrome tools, which puts higher requirements on friends, especially BGA-packaged North-South Bridge chipsets, etc. Without special tools, it is impossible to replace BGA chips such as North-South Bridge, so there is no way to put a perfect end to a reasonable judgment. The final result is to disappoint the customer.
1. Technology
Technology is to analyze a bad motherboard based on signals and circuit principles (or related datasheets) and make correct judgments between the expected value and the measured value. This depends on personal rich work experience, learning ability, observation ability, testing experience and inference ability of problems.
2. Instruments
In front of motherboard analysis, we face various electronic parts. Their combination or logic, the most common manifestations are voltage, frequency, waveform, and impedance. In order to obtain the accurate parameters of these circuits, corresponding measurement instruments must be provided. The quality of the instrument will of course determine whether the inference is correct or not. Without instrument analysis, you will never have the ability to explore problems yourself, and you can only rely on other people's experience sharing. Although there is Top Issue among various electronic products, there is no reason to say that the same part will always be broken. It is precisely because of this that when dealing with different problems, a variety of instruments and tools are needed. The resistance value card type is to speed up the working progress and solve some points that cannot be detected without drawings. Oscilloscopes and meters are used to present an electrical parameter.
3. Materials
Before finding the problem with sufficient understanding and problem analysis, you still need to have enough materials (chipset, power supply IC, MOSFET, functional chip, Flash ROM) to replace the potential defective products you suspect.
4. Equipment
When the materials and fault points are met, some parts cannot be solved with commonly used ferrochrome tools, which puts higher requirements on friends, especially BGA-packaged North-South Bridge chipsets, etc. Without special tools, it is impossible to replace BGA chips such as North-South Bridge, so there is no way to put a perfect end to a reasonable judgment. The final result is to disappoint the customer.