The devices most commonly used computer keyboard input, consisting of keys, conductive plastics, and encoder interface circuits, etc..
On the keyboard usually has hundreds of buttons, each button is responsible for a function when the user presses one, the keyboard encoder can quickly this button for the transmission code to the computer through the interface circuit of the keyboard buffer by the CPU's processing of recognition. In simple terms, ie when the user presses a button, this will be the circuit through the leads connected with this Plastic key signal generated, the signal generated by the keyboard interface, quickly sent to the CPU.
"Keyboard error" Troubleshooting
"Down the keyboard "That's what we often encounter problems. This is usually because the circuit board or a conductive plastic on the ground, making the two can not be properly connected. Other factors may also be, for example, take the keyboard is damaged, circuit problems, damage to the motherboard, processor is not working properly and so on, but not the main reason. Therefore, we have to do the job scale.
Take HP 441541-001 Laptop Keyboard for example, performance measures are:
1. Remove the keyboard. Note that when you open the keyboard, make sure that the surface of keys (ie – our ramp) down, printed circuit in place, otherwise, each plastic key factor in May were published, giving the repair problems.
2. Open circuit boards, circuit boards are usually made of soft plastic sheets, the top row of buttons marked lines, with the concentration of alcohol, preferably over 97% of cotton (75% medical alcohol can also be cotton, because I, but it is better to use high concentrations of alcohol, cotton) and gently wipe twice on the circuit board. Part of the line of the lack of support on several occasions.
3. See the main shortcoming of the conductive plastic, if the former has accumulated a large amount of dirt, alcohol same brush. Suppose conductive plastic is damaged, I suggest that you can not key factor of plastics used for the damaged part, but this initiative can not touch the keyboard for all functions, but most at least, it can prolong the life of frequently used keys.
4. Remove the keyboard in a corner in the land, the tools can be a brush, small brush and immediately, but please note that some measures should be soft.
5. See the module on whether the common cold welding or loop can be made Welding repair (using tools such as silver conductive paint, concrete repairs please refer to the following examples of the repair section portable keyboard).
6. Install a good keyboard. It should be noted here that we must wait and then cleaning alcohol evaporates.
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