Replacement method of chip capacitor loss
1. Anyway, the capacitor has been lost, just turn on the power to see if it can work. If it works, then it can work without these two capacitors, so there is no need to change it.
There are some electronic components in an electronic product that have a stabilizing effect. Even if it is removed, the device can still work normally.
The PCB trace next to the capacitor should be the capacitor around the power supply, which mainly plays a role of smoothing the waveform and stabilizing. Generally, the DC circuit voltage is already very stable, and it will not affect if these two capacitors are not used.
A circuit board used in work, even if all the capacitors used are removed, it can still operate normally, but this is not recommended, and the technical specifications should be followed at all times.
2. Just put two capacitors. The withstand voltage of the packaged capacitors is the same, and there is generally no need to consider the withstand voltage here.
The capacitance value, even if the changed capacitance value is different, it will not cause damage to the circuit, and it is possible with a high probability.
There is a wide range in the selection of capacitors. For example, some 10nF capacitors can be replaced with 100nf capacitors, or 100000000nf. The equipment can also operate normally, but the cost will be greatly increased.
3. If the first two methods do not work, you can solder off the capacitor on another circuit board, measure the capacitance value with a multimeter, and then solder some capacitors from the other circuit board to find that the capacitance value is the same or similar Yes, just solder it to the circuit board.
If you really can’t find it, you can buy some online. The price is very cheap. You can buy more spare parts.
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