samkartech

fig :- Block diagram of Mother board

Motherboard is the real state of computer. All the computer ports [input,output,processing] are connected in this board.Motherboard is made by using fiber glass materials on which conductor circuit are printed. Motherboard PCB may have 4 to 16 layers on each layer various circuit are printed. Inner layer of the board contains circuit for data & outer layer are used to carry power signal and control signals. Various parts ,slots,headers& socket are inbuilt on Motherboard which are used to connect input,process and output parts. Back parts of Motherboard PS/2 port :- purple  -To connect ps/2 keyboard.

Motherboard power supply section:-   Motherboard get the power from two Port which are mentioned below   1> ATX 20/24 pin port   2> ATX  12V port -ATX 12V port is used to supply the voltage to the CPU. -Voltage at ATX 12V port is received from power supply which is converted into core voltageusing       the VRM section &then supplied to CPU. - VRM[Voltage Regulation Module] section convert the 12V dc into 1V-2V ,40 to 50A.

                                            fig:- working principle of SMPS       fig :- SMPS of computer From the above figure, we came to know that the function of SMPS in computer which is to convert  the high 220V-AC to 0-12V DC.SMPS contain several color of wires which carry the different voltage to the different parts of the computer.The following table shows the different color cables and its carrying voltage.