This is to see what chip, if it is some special custom chip, it is impossible to judge the model after polishing, and what people polish is to prevent someone from copying the board.
If it is similar to the U disk master and flash memory, even if it is polished off, you can use this kind of software chip wizard to detect the master and flash model.
If it is a computer chip, the model of the chip can also be judged by the detection of the driver and third-party software, but the computer chip is basically rarely polished by the motherboard factory, in addition to the miscellaneous brand in order to hide people will do so.
Guess based on the peripheral circuit and the approximate function of the chip at a certain location, assuming specific properties of electronic circuits, including analog and digital circuits. If you want to guess correctly, you need to have a very high level of technology, otherwise don't be whimsical.
This can be based on the circuit principle of the circuit board, to reverse the approximate function of the worn chip, can be replaced with other chips with the same function; But be sure to know that the chip model is a certain difficulty!
The silk screen on the chip refers to the number or letter identifier printed on the chip shell. You can find the model of the chip through the silk screen. The specific methods are as follows:
First, observe the number and letter identification on the chip housing and record it.
Using an Internet search engine, enter the chip brand and model, such as \"TI LM324\
In the search results, you can find the model that matches the screen print of the chip, and you can also understand the details of the chip.
It should be noted that the chip screen printing can sometimes be worn or scratched, affecting the identification. At this point, you can use a tool such as a microscope to observe, or consult the chip manufacturer or supplier