The crystal pins are black, what should I do?

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The crystal pins are black, what should I do? [Copy link]

What should I do if the crystal pins turn black?

The crystal pins turn black because of oxidation due to improper storage. We can see that there are some black spots on the metal surface. The black spots are the result of rust caused by the metal parts coming into contact with oxygen.

We also have to learn something about the storage methods of crystal oscillators. We must be aware of the losses that the oxidation of crystal pins will bring to our work. First of all, the oxidation of the crystal pins will make the tin wire and solder paste unable to be soldered normally; in addition, the oxidation of the crystal pins can easily cause the crystal to stop oscillating, and the performance is poor, that is, a bad crystal. If the oxidation of the crystal pins in the inventory is a minority, we can use the following methods to make it look brand new.

1. Use an eraser to gently wipe the black spots on the crystal pins until the black spots disappear and then you can use it normally.

2. Try using an alcohol cotton ball to wipe the black spots on the pins. 3. Use a small blade to slowly scrape off the black surface. 3. Use a small blade to slowly scrape off the black surface. 3. Use a small blade to slowly scrape off the black surface. 3. Use a small blade to slowly scrape off the black surface. 3. Use a small blade to slowly scrape off the black surface. 3. Use a small blade to slowly scrape off the black surface. 3. Use a small blade to slowly scrape off the black surface. 3. Use a small blade to slowly scrape off the black surface. 3. Use a small blade to slowly scrape off the black surface. 3. Use a small blade to slowly scrape off the black surface. 3. Use a small blade to slowly scrape off the black surface. 3. Attachment 345694 ... 2. Second, for fragile crystal oscillator devices, anti-vibration measures should be taken. They should not be placed on high shelves. During use, the crystal oscillator should not be dropped. Generally speaking, a crystal oscillator that has fallen from a high altitude should not be used again. 3. During the crystal oscillator soldering process, the soldering temperature should not be too high, and the soldering time should not be too long, to prevent the crystal from internal changes and instability.

4. When the crystal oscillator shell needs to be grounded, you should ensure that the shell and the pins are not accidentally connected to cause a short circuit. As a result, the crystal will not oscillate.

5. Ensure that the solder points of the two pins are not connected, otherwise the i crystal will stop oscillating.

6. For crystal oscillators that need to be cut, pay attention to the influence of mechanical stress.

7. After soldering, clean it to prevent the insulation resistance from not meeting the requirements.

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The pins of the crystal oscillator are all black, which means that the inventory time is too long, or the crystal oscillator is defective.

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It is best to clean it up and then weld it.