source:Other information release time:2023-06-02 Hits: Popular:PCB Assembly company
1. Usually, only oscilloscope (crystallization needs to be used for power) or frequency is used to test, and universal tables cannot be measured, otherwise the replacement method can be used.
2. The common faults of crystals are: a. Internal leakage, b. Internal opening C. Frequency frequency D. The peripherals are connected to the peripheral electric leakage. HereSolar Energy System
3. Two judgment methods can be adopted during the whole board test: a. During the test, the chip surrounding the crystal is not passed .b. No other fault points were found except the crystal.
4. There are two types of crystal vibrations: A. Both feet .b. Four feet, of which the second foot was added with a power supply. Be careful not to be short -circuited at will. 5. Distribution of fault phenomenon 1. Increasing statistics of the circuit board failure part: 1 ) The chip is damaged by 30%, 2) Divided components damage 30%,
3) The connection (PCB board compact copper wire) breaks 30%, 4) Program destruction or loss of 10%(there is a rise trend).
2. It can be seen from the above that when there is a problem with the connection line and the program when the circuit board is repaired, there is no good board. It is not familiar with its connection and the original program can be found.
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