Prototype PCB assembly is a crucial step in the electronic manufacturing process, which involves combining the designed circuit board with various electronic components to form a functional electronic device. This process not only requires professional technical knowledge, but also high precision and meticulous operation. In the prototype stage, manual assembly is usually used to ensure that each component can be installed and welded correctly.

　　When assembling the prototype PCB, it is necessary to first prepare all the components and tools. Components include resistors, capacitors, chips, etc., while tools include soldering, soldering iron, tweezers, magnifying glasses, etc. Next, according to the circuit design drawings, install each component onto the PCB one by one. This step requires the operator to have good vision and hand eye coordination skills, as components are very small, especially SMD (Surface Mount Devices) commonly used in modern electronic products.

　　After installation, welding is required. When welding, it is necessary to ensure that the welding points are smooth, free of burrs, and there should be no virtual welding or short circuits. This not only affects the functionality of the circuit, but may also lead to the failure of the entire project. After welding is completed, strict inspection and testing are required to ensure that each solder joint meets the requirements and the circuit functions properly.