Laptop power switch wiring.
Find the PWR switch is the most important part of the jumper, as the switch of the connector pin is generally distinctive, two pins are a group, controlling the power light, hard disk light, switch and restart the four connecting lines, these pins no matter what the motherboard will be in the put together, recognizable.
Switching power supply products are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communications equipment, power equipment, instruments, medical equipment, semiconductor refrigeration and heating, air purifiers, electronic refrigerators, LCD monitors, LED lamps and lanterns, communications equipment, audio-visual products, security, computer chassis, digital products and instrumentation and other fields.
Expanded InformationComposition of laptop power adapter
1, varistor, its function is when the external voltage is too high, the varistor resistance value quickly become very small, and the series connection with the varistor fuse is blown, so as to protect the other circuits not to be burned.
2, the fuse, specification for 2.5a/250v, when the current in the circuit is too large, the fuse will blow to protect other components.
3, inductance coil (also known as choke), the main function is to reduce electromagnetic interference.?
4, rectifier bridge, specifications for the d3sb, the role of the 220v ac into dc.?
5, filter capacitors, specifications for the 180uf/400v, filtering DC in the AC ripple, so that the circuit work more reliable.?
6, op amp ic (integrated circuit), protection circuit, an important part of voltage regulation.