First, what is circuit board fracture?
In the design of electronic products, the circuit board is an important part of connecting various electronic components. The basic material of the circuit board is glass fiber cloth and epoxy resin, and the copper wire and pad of the circuit board are the keys to connecting electronic components and power supplies. When the circuit board is affected by force, bending, or vibration, it may cause damage and fracture of the wires and pads on the board. In addition, there are other reasons such as the quality of the circuit board connection line being poor or aging, especially after a long time of use, the cable is easy to age and break. The line connecting the circuit board is too small or the line spacing is too small, which is easy to cause damage during use or disassembly. This is the main cause of circuit board breakage, resulting in the failure of electronic modules or entire electronic devices.
Second, the repair method of circuit board fracture
- Wire fracture repair
Wire breakage is a common problem with circuit board damage. Usually, as long as the wire is not broken, the welding power supply, solder wire and tin absorber can be used for welding repair. First, clean the working surface with sandpaper or a steel brush, trim the solder wire to the appropriate length, so that it is slightly longer than the connector wire. Then, the trimmed solder wire is placed on the broken connector wire and welded. The crystal tin is absorbed by a tin absorber to make the solder joint appear smooth and round. Finally, use a multimeter to check whether the repaired wire path is smooth.
- Modify the circuit board cables
If multiple connector wires on the board are broken or damaged, the wiring in the design concept can be modified to save the board. Wiring modifications can be as simple as replacing the connector wires back into place or relaying the wires. If the entire board surface is damaged at the same time and a large piece of wire is damaged, you can first redesign the board drawing with the help of PCB drawing software, and then let a professional manufacturer make the board.
- Use jumper Bridges
If the individual wire to be repaired is small or difficult to weld, it is recommended to use a jumper bridge for repair. Jumper Bridges are a method of connecting internal components with wires that replace broken connector wires on a circuit board. Jumper Bridges can be made of materials such as copper wire, metal connector wire or plastic insulated wire. This method requires in-depth analysis of the board with multi-functional testing instruments, and careful measurement of the size and position of the jumper bridge is required before repair to ensure the repair effect.
4. Use jumper Bridges
If the individual wire to be repaired is small or difficult to weld, it is recommended to use a jumper bridge for repair. Jumper Bridges are a method of connecting internal components with wires that replace broken wires on a circuit board. Jumper Bridges can be made of materials such as copper wire, metal connector wire or plastic insulated wire. This method requires in-depth analysis of the board with multi-functional testing instruments, and careful measurement of the size and position of the jumper bridge is required before repair to ensure the repair effect.
Third, the prevention of circuit board breakage
The prevention method of circuit board breakage is also very important. Often, prevention is better than cure. Here are some board protection tips:
- Use good quality circuit board materials.
- Avoid long-term wear and vibration.
- Install a protective cushion, such as rubber or foam.
- Avoid direct contact with other metal materials and hard materials.
In general, the circuit breakage connecting the circuit board is one of the common faults of electronic equipment, and the welding repair method can solve the problem quickly and effectively. In addition, before welding repair, it is necessary to master some basic knowledge and skills of welding to avoid poor welding quality caused by carelessness.
