The general blue-white adjustable resistor is generally the same in operation as other ordinary adjustable resistors, except that the blue-white adjustable resistor has a blue substrate appearance and a white top cap color, so it is also widely known as the blue-white adjustable resistor or blue-white potentiometer. So, do you know how to weld and install the blue-white adjustable power resistor? What details should be paid attention to during the operation? Presumably non-technical personnel, you seldom know about this aspect of resistance welding at ordinary times, so here's a detailed explanation about the blue and white adjustable resistance, such as Welding and operation details.

How to adjust the blue-white adjustable resistors

Operation steps 1
Generally, when the blue-white adjustable power resistor is opened, it may absorb some dust on the air surface, so before welding, please pay attention to clean the PCB circuit board to be welded and remove the impurities and impurities from the solder joints. Be sure to ensure that it is clean before welding. No one will affect the post welding operation.

Operation steps 2
Secondly, the second step is to preheat the ferrochrome with the welding adjustable variable resistor, in which some solder can be added to facilitate the post-operation of the welding quality and welding speed, and then as long as the blue and white resistance of each foot into the PCB circuit board corresponding to the line hole soldered firmly.

Operation step 3
At this point, all the blue and white resistance terminal welding completed, such as the adjustable variable resistor of each pin solder joint has not completely cooled, please note not immediately to do the welding test, because the solder joint temperature at this time is a relatively high temperature situation, even if some small touch or shake phenomenon will cause resistance solder joint to break. Or the condition of void welding. Therefore, it is necessary to wait a few minutes until the welding temperature is completely cooled, then the post-test work, if there are false welding and false welding, must be re-welding.

Welding matters needing attention of blue-white adjustable power resistor
Welding precautions 1
For blue-white adjustable variable resistor operated welding, the preheating temperature should not be too high, because the preheating effect of Luotie is mainly compatible with the effect of predicting the welding temperature. If the preheating temperature is too high at once, it will lead directly to resistance welding through or weld failure, so please add more notes. The details before welding are emphasized.
Welding precautions 2
Be careful to keep ferrochrome clean and remove impurities from the solder joints before and during the welding process. Otherwise, excessive adsorption on the solder joints will easily lead to adverse effects during the resistance welding process, such as false soldering or welding instability.