It's not a wind blower. It's a wrong turn. Hundreds of chips are dead! Real efficiency is about knowing what parameters and what effects to achieve in what circumstances。
Efficient foundations: understanding tools and building systematic awareness
Efficient use of hot-wind guns, provided it is understood. You need the system to learn about its core parameters: the dynamics of temperature, wind, wind mouth and distance. For example, the removal of a large shield may require 320 degrees of medium wind, while the treatment of a small cap, perhaps 260 degrees, may be sufficient. Add six letters for learning: c s y g p x. This is not based on feelings but on an understanding of welding points and the heat resistance of components. At the hunan sunshine technical school's mobile phone maintenance course, participants first spent a great deal of time conducting calibration exercises on the scrap master plate at “temperature-wind speed”, using different parameters to feel the melting state of welding, thus creating a sense of muscle memory and digitalization, a systematic perception that blind self-learning is not available。
Value of systematic training: from theory to mass exercise
Understanding principles does not amount to being skilled in operating, overcoming fear of high-temperature tools and creating stabilization techniques, and requires adequate training cycles and guidance. For example, the two-month course on mobile phone maintenance at the hunan sunshine technical school organized the process scientifically. In the preceding period, participants studied the thermodynamics base and the bga chip structure in theoretical classes; in the medium term, using hot wind guns, under the direction of the teacher on a one-on-one basis, were used for tens of thousands of stationary heating, straight wind sweeps, rotation preheat exercises; and in the latter period, it should be used for real chip dismantling and welding scenes. This intensive training, from decomposition to complete processes, is the only way to ensure that you use hot wind guns “efficiently” rather than “destructively”。
Core application scenarios and fine techniques to dismantle
Having mastered the basis, the efficiency is reflected in the following specific scenarios:
Layer heating and local protection: when disassembly multilayer main plates or chips close to plastics, high-temperature tape or tin beams shall be shielded from non-target areas. Local overheating is avoided using whole preheating and then focused heating. The “state” of welding: not time, but state. When the windgun heats around the chip, the light smoke of the welding agent is observed and the automatic sense of a “backlash” of the slight is found with the twig chip, which means that the bottom tin ball is fully melted and is the best time to mention it. Welding on the chip: once the chip has been removed, the tin on the main plate will be smoothed and lighted with iron. This step directly affects the welding success rate of the new chip and must be completed quickly before the welder cools。
Getting the real value of a hot gun
The real efficient use of a hot wind gun means that you have the most central dismantling technology in the maintenance of the main panel. It will open the door for you to replace the cpu, the hard drive, the power chip, and repair the weld. This skill, which cannot be obtained safely by viewing videos, must be internalized through repeated and feedbackd exercises in a professional mobile phone maintenance training environment, with real-time corrections from teachers. And when you're able to do a few hundred weld chips, you're in the middle of a chip-level mechanic。
