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What Should I Do If Soldering Bad Components in PCBA Processing?

PCBA Desoldering Method:

(1) Split Soldering Method: For horizontally mounted resistor-capacitor components, the distance between the two welding points is relatively long, you can use a soldering iron for point heating and point-by-point extraction. If the pins are bent, use the tip of the soldering iron to pry them up directly and take them off. When desoldering, stand the PCB upright, use the soldering iron to heat the pin soldering point of the component to be removed, use tweezers or pointed pliers to hold the component pins and gently pull them out.

(2) Concentrated Desoldering Method: Since the pins of the row resistor are soldered separately, it is difficult to use the soldering iron to heat at the same time. You can use the hot air welder to several solder joints for rapid heating, the solder melted can be pulled out.

(3) Stay-Solder Method: Solder is sucked from the solder joint with a solder tool. Usually, the component can be removed. If you encounter a multi-pin electronic component, you can heat it with the help of an electronic heater.
If it is lap-soldered components or pins, you can apply flux to the solder joint, solder the solder joint with a soldering iron, and remove the pins or wires of the component. If it is hook-soldered components or pins, first use the soldering iron to remove the solder at the solder joint, then use the soldering iron to heat the residual solder under the hook to melt. At the same time, use a shovel to lift the pin along the hook line direction. Do not pry too hard, so as not to splash the melted solder into the eyes or clothing.

(4) Cut Soldering Method: If the pins and wires of the components on the removed solder joints have spare capacity, or determine that the components are damaged, you can first cut off the components or wires and then cut them off. The wire ends on the pads can be removed.



Grande specializes in providing overall PCBA electronic manufacturing services, including PCB design, upstream electronic components procurement to PCB production and processing, SMT placement, DIP plug-in, PCBA testing, finished product assembly and other one-stop services.

The company gives full play to its competitive advantages in scale procurement and quality control, and has signed long-term cooperation agreements with many domestic and global electronic component manufacturers to ensure the quality and stable supply of raw material sources and transfer the benefits to customers.

Long-term procurement advantages in IC, resistors, capacitors, inductors, diodes and other components can greatly save customers’ inventory costs, improve production turnaround efficiency and save time. At present, we provide PCBA processing services for customers in USA, UK, Japan, Russia, France, Canada, Australia, Romania, Switzerland and other countries and regions.

We provide PCBA processing services, starting from PCB board fabrication, our own PCB manufacturer (with extremely strict TS16949 certification for the automotive industry), focusing on the quality of the board and PCBA quality control system.

Due to decades of experience in procurement of electronic components, we maintain long term cooperation with large brands to ensure the original packaging of components and procurement channels. In the encapsulation process of components, we choose Senju and Loctite solder paste to ensure the reliability of the soldering, with automatic printing machine, Panasonic high-speed placement machine, upper and lower eight temperature zone reflow soldering, AOI automatic optical detector, etc., which can effectively ensure the reliability and quality of the electronic packaging process.

In addition, the perfect management process of IPC, IPQC, OQA, etc., with clear job responsibilities and strict implementation of IPC electronic assembly acceptance standards. Regarding PCBA testing, we have professional engineers to perform 100% batch testing using various test stands, including pathway, noise, amplitude, signal, temperature, humidity, drop or execute customer’s detailed test program. All efforts aim to be a fine PCBA processing manufacturer.


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