When we find that the chip (or component) is damaged and needs to be replaced, we need to use the soldering technology, and the soldering technology is also the basis of the chip-level repair. Soldering tools (equipment): hot air gun removal soldering station, temperature-controlled soldering station.
Desoldering Tools-Hot Air Gun Rework Station:
Soldering Tools-Temperature Control Soldering Station:
Hot air gun is mainly used to dismantle the chips on the motherboard of the notebook, desktop computer, etc., PCB layers of 5-8 layers or so. (If the layers are too thin, it is easy to blow the bulge and the motherboard wires are easy to break.) Remember to use the power supply board carefully with a hot air gun.
Soldering iron is mainly used to dismantle the power supply board and the number of layers for the following 3 layers of components on the motherboard, most to dismantle with the pin type of components.
Hot air gun
1. temperature: hot air gun we generally use the novice temperature should not exceed 380 degrees Celsius, wind speed control in 4 to 5 gears. Skilled and then slowly adjust the temperature and wind speed that you feel appropriate.
2. when we start desoldering, the hot air gun outlet vertically aligned with the components, so that it is safer. Otherwise, it will blow the chip surrounding small components (capacitors, resistors, etc.). Do not be too close, otherwise the PCB board will be blown paste Oh, yes, you heard right, is to blow paste.
Rotated vertically in one direction at a constant speed:
3. During operation, the hot air gun should be rotated vertically in one direction at a constant speed so that the chip is evenly heated and melted when it reaches the tin point of the chip.
4. When we operate, our hands must be steady, which requires everyone to practice a lot.
soldering station
1. The temperature is generally set at 350 degrees Celsius, and most components can be desoldered. Although the melting point of tin is 231.8,9 degrees Celsius, when the tin area is particularly large, we need to increase the temperature of the constant-temperature soldering iron. We need a higher temperature to increase the melting speed of tin.
2. Be careful not to burn yourself. Safety first.
3. After use, apply some tin wire on the soldering iron tip. This will help extend the service life of the soldering iron tip.
1. Observe whether the pins around the chip are soldered well and whether the pins are connected. If they are connected, the chip may not work or be short-circuited.
2. According to the measurement points, measure whether the resistance of the functional pins to ground, signal pins, power supply pins, etc. are normal.
Above all, the use methods and techniques of the hot air gun and soldering iron, hope it helpful to you.
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