English Views: 0 Author: Dongguan Intercontinental Technology Co.,Ltd. Publish Time: 2021-07-22 Origin: www.smtfactory.com
SAMSUNG Pick & Place Machine's chip capacitor identification rules are partly similar to chip resistors. The difference is that the surface of the chip resistor will have parameter identification, but the surface of the chip capacitor does not have any parameter identification. This is the same as the production of chip capacitors. The process is directly related, so the problem is, since the surface of the SAMSUNG Pick & Place Machine chip capacitor is not marked, if the capacitor is damaged, how should we replace it?
This is the content list:
Replace the capacitors of the SAMSUNG Pick & Place Machine by referring to the parameter examples in the data sheet.
What are the steps to replace the chip capacitors of the SAMSUNG Pick & Place Machine?
How to change the efficiency of the chip capacitor of the SAMSUNG Pick & Place Machine?
The chip capacitor of the SAMSUNG Pick & Place Machine is less likely to be damaged, but if the capacitor is close to the heat dissipation position of the Zener tube, a short circuit will occur. If the knowledge of the patch capacitor has a little leakage, you can first measure its capacity with a capacitance meter. If the difference is not big, find a capacitor with the same capacity or higher withstand voltage instead.
If the capacitor of SAMSUNG Pick & Place Machine is used as a part of the oscillating circuit, then this type of capacitor is to cooperate with other components to control the oscillation frequency, and a chip is indispensable, then we can refer to the data sheet of this chip, which will be given in the data sheet For the parameter range of the surrounding components, we refer to the parameter examples in the data sheet to replace the capacitor is also a very practical method.
First of all, use a hot air gun to remove the capacitor, solder with a very sharp electric soldering iron, and then use a sharp-tip soldering iron, first add a little tin to one foot of the capacitor, because the SAMSUNG Pick & Place Machine board itself generally has a certain degree of oxidation. , And there is very little tin in the capacitor feet, and it is not good for heat transfer without adding a little bit, and then use a soldering iron to heat it, and pull the capacitor to the other side with your hand or tweezers, so that the heated foot is separated from the circuit board, and then the other one is heated. After removing it, pay attention to the temperature of the soldering iron, and also pay attention to whether the tin on the pad of the capacitor foot has been completely melted.
Then, press the other end hard to break, that is, move with the other end as the fulcrum, instead of breaking upwards. If you take it off like this, it can only be said that your circuit board is already broken. Use 2 pointed soldering irons, respectively. Align the solder joints on both ends of the capacitor and apply a slight upward force. After the solder melts, the capacitor of the SAMSUNG Pick & Place Machine will naturally fall off, leaving its 2 pins on the circuit board so that it can be easily removed with an electric soldering iron. It's up.
SAMSUNG Pick & Place Machine's chip capacitor electrodes and electrolyte electrolytic capacitor electrodes on the active matter and electrolyte will also affect its conversion efficiency. The electric capacity is large, and the conversion efficiency is relatively low. The metal material and thickness of this layer will affect the conductivity. Since the capacitor relies on charging and discharging to “transmit” the signal, the smaller the conductor resistance, the smoother the current, the better the transient response, the smaller the phase shift induced by the conductor resistance.
