Dome pieces (metal shrapnel) are widely used in our work and life, but many friends do not know much about dome pieces (metal shrapnel), let alone emergency treatment when the dome pieces encounter some failures. Today, the editor of Delgao brings you some reasons and solutions about the poor conduction of the dome and the failure of the function key, hoping to help you understand and use the dome (metal shrapnel).

1. Dirt on the spherical surface of the dome (metal shrapnel) will endanger the contact between the DOME and the PCB board.

Solution: Replace with new dome pieces (metal shrapnel) / use multi-middle-meter dome pieces (metal shrapnel) or wipe with "orange".

2. The hot red gold fingers on the PCB board/FPC board have air oxidation hazards to touch.

Solution: Remove and replace the new PCB board/FPC board.

3. The appearance of the dome (metal shrapnel) does not match the appearance of the hot red gold finger contacts of the PCB board/FPC board.

Solution: Replace the matching dome (metal shrapnel) according to the appearance of the red gold finger on the PCB board/FPC board.

4. There is a large gap between the dome piece (metal shrapnel) and the function key, and it is impossible to press it lightly.

Solution: According to the main parameters of the design plan, adjust the dome (metal shrapnel) suitable for the itinerary.

5. If the function key gap is too small, it is harmful to press lightly.

Solution: enlarge the aspect ratio of the dome (metal shrapnel) or reduce the function key to remove the gap where the top of the dome (metal shrapnel) touches.

6. The dome piece (metal shrapnel) is folded and raised by the grounding device "inside the ear", and the DOME is not clear when pressed lightly.

Solution: Change the "inside the ear" part of the grounding device or increase the aspect ratio of the dome (metal shrapnel).