PCB News - How to maintain pcb circuit board

How to maintain PCB circuit board

I believe that many customers of circuit board factories will have such problems. How should PCB circuit boards be maintained? How can the life of the circuit board be longer? Now let the editor analyze the maintenance of PCB circuit board for you.

The PCB circuit board adopts the method of printing etching resist to make the circuit lines and drawings. Circuit board factories can be divided into single-sided PCB boards,double-sided circuit boards and multilayer circuit boards according to the number of circuit layers. Common multi-layer boards are generally 4-layer boards or 6-layer boards, and complex multi-layer boards can reach more than a dozen layers.

There are both high-speed logic circuits and linear circuits on the circuit board. They should be separated as much as possible, and the ground wires of the two should not be mixed, and they should be connected to the ground wires of the power supply terminal. Try to increase the grounding area of the linear circuit as much as possible. So how should the PCB circuit board be maintained?

1. Semi-annual maintenance:
Observe whether the electronic components in the circuit produced by the circuit board factory have undergone high-temperature traces, and whether the electrolytic capacitor has bulged and leaked, and should be replaced if any.
The dust on the PCB circuit board is cleaned quarterly, and the special cleaning fluid for the PCB circuit board can be used to clean the PCB circuit board. After the dust on the PCB circuit board is cleaned, the PCB circuit board can be blown dry with a hair dryer.

2. Annual maintenance:
1. Clean the dust on the PCB circuit board.
2. Carry out sampling inspection of the electrolytic capacitor capacity in the PCB circuit board. If the electrolytic capacitor is found to be less than 20% of the nominal capacity, it should be replaced. Generally, the electrolytic capacitor should be completely replaced after ten years of service life to ensure the PCB circuit. The performance of the board.
3. For high-power devices coated with heat-dissipating grease, check whether the heat-dissipating grease is dry or not. For dry heat-dissipating grease, remove the dry heat-dissipating grease and apply new heat-dissipating grease to prevent PCB circuits. The high-power devices in the board burn out due to poor heat dissipation.