1. The audio circuit pc board company recommends looking at the circuit board to be repaired first and then measuring it, and first of all, it should be visually inspected. Observe with the aid of a magnifying glass if necessary.

　　2.First outside and then inside

　　When the audio circuit pc board company uses the circuit online repair tester for testing, if the situation allows, it is best to have a good circuit board that is the same as the one to be repaired as a reference. Then use the tester's dual-rod VI curve scan function to perform a good and bad comparison test on the two boards.

　　3. Easy first and then difficult

　　The audio circuit pc board company believes that in order to improve the test effect, before the online functional test of the circuit board, some technical processing should be done on the repaired board to minimize the impact of various interferences on the test process.

　　4.The audio circuit pc board company recommends static first and then moving

　　The audio circuit pc board company found that, for now, only functional in-circuit testing and static characteristic analysis can be performed on the devices on the circuit board. Therefore, whether the faulty circuit board is finally completely repaired must be installed on the original device for inspection. In order to obtain the correct result of this inspection process, to judge whether the circuit board is repaired. At this time, it is best to check whether the power supply of the device is correctly supplied to the circuit board as required, and whether the interface plug-ins on the circuit board are all connected.