Electrician Electronics Internship Summary Report

Internship content and purpose: Radio installation, welding and debugging, let students understand the assembly process of electronic products; master the identification and quality inspection of electronic components; learn the assembly process of the whole machine; cultivate hands-on ability and rigorous work style. Fan Wen China, original Fan Wenyuan

Identify the measurement: 1 Learn how to use the color ring to read the resistance, then use a multimeter to verify that the reading is consistent with the actual situation, then put the resistance on the paper, mark the data to improve the next welding speed; 2 learned how to measure The diode and how to identify the "+" and "-" poles of the diode, 3 learned how to use a multimeter to measure the magnification of the triode, how to identify the "b", "e", "c" of the triode The three pins; 4 learned the identification and reading of the capacitor, "╫" means the capacitor of the element, regardless of the "+", "-" pole; "┥┣+" means the electrolytic capacitor.

Welding experience: When welding the radio, learning to weld should be my biggest gain. The following is a brief introduction to the following welding experience. The most important thing to pay attention to is the temperature and time of welding. When soldering, the temperature of the soldering iron should be higher than that of solder. But not too high, the rosin of the soldering iron joint just smoked, the welding time should not be too short, because the solder joint temperature is too low, the solder joints are not melted enough, the solder joints are rough and easy to cause the solder joint, and the soldering time Long, the solder is easy to flow, so that the components are overheated, easily damaged, and it is easy to burn the printed circuit board or cause a short circuit in the soldering.

Welding sequence: 1 In the middle of welding, in order to balance the printed circuit board, we need to weld two diagonal mid-weeks. Before welding, we must identify the color of the middle week to avoid soldering. Do not suddenly All the four middle weeks are welded on the top, so that the small components will not be installed in the future. 2 welding resistors. We have already placed the resistors on the paper. We have to weld them in the order of R1 - R13 to avoid leakage of the resistors. After the resistor, we need to use a multimeter to check whether the resistors are the same as the previous values. →3 soldering capacitors, first solder the capacitors, pay attention to the above readings, followed by the soldering capacitors. Pay special attention to the long legs. +" pole, short foot is "-" pole → 4 welded diode, red end is "+", black end is "-" → 5 welding triode, must recognize "e", "b", "c" three-pin → 6 remaining mid-week and transformer and switch can be welded → 7 most need to be careful is to solder the antenna coil, with four wires must be accurately welded according to the circuit diagram → 8 welding printing Circuit board "Intermittent-shaped part, we need to connect them together by solder → ⑨ welding horn and the battery holder.

Debugging and testing: Debugging is a very difficult and patient task, but its purpose and significance is very significant. We must understand the production and debugging process of general electronic products through the detection and debugging of the radio, and initially learn how to debug electronic products, cultivate testing capabilities and meticulous scientific style. First of all, we need to check whether the soldering circuit damages the printed circuit board, check whether the resistance is the same as the drawing, whether the diodes and the triodes have the polarity welding fault, the position is wrong, and whether the circuit board is broken or shorted. Whether there is a short circuit caused by welding during welding, and whether the positive and negative poles of the power supply lead wire are correct. Second, you need to check the power - in the power-on state, carefully adjust the middle week, be sure to record each adjustment process, if the adjustment fails, then re-adjust back to the original position, it is not good to ask the teacher to help! But we must be patient throughout the process.

The significance and experience of this internship: After two weeks of electrical and electronic internship, we learned the basic welding technology, the detection and debugging of the radio, and the assembly process of electronic products. We also learned the identification and quality of electronic components. Inspection, knowing the assembly process of the whole machine, these are our hands-on ability and rigorous work style, which also laid a good foundation for our future work. The most basic point: When I was studying the "Electronic Electronic Technology" class, I always felt that the teacher was too abstract. Through this study, I realized a lot of things. And this should be very useful in our future professional courses. As for our own professional, we also need to systematically study power electronics technology, automatic detection technology and signal and system knowledge, and this time we installed the radio and We used it during the debugging process. In short, in the internship, we must always keep a clear head and make mistakes. We must carefully and calmly check the analysis errors! In the end, I finally heard that my radio had successfully played a moving voice. I was really happy. I finally felt that my efforts have not been in vain!