电脑电源各线电压（Line voltage of computer power supply）.doc

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电脑电源各线电压（Line voltage of computer power supply）.doc

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电脑电源各线电压（Line voltage of computer power supply）

电脑电源各线电压（Line voltage of computer power supply） Black --- ground wire (negative electrode) Yellow - positive 12V Red --- positive 5V Multimeter pointer dial to v- (DC voltage) 20V (or 50V) file Multimeter black line to black line The red line of the multimeter is yellow (or red) To see if the voltage is correct, note: when no-load, the voltage is higher than the rated voltage. This is the line number of the main board: Red: on behalf of the +5V power line (motherboard, hard disk, CD-ROM and other hardware chip voltage). Yellow: represents the +12V power line (hard disk, CD-ROM, fan and other hardware voltage on the work, and -12V to the serial port to provide EIA power). Orange: represents the +3.3V power line (powered directly to the DIMM and AGP slots). Grey: on behalf of the P.G line (power line status information, which is obtained by some other power line circuit calculation results, when you press the button after the computer starts, signal power good signal that there is no boot the motherboard fault automatic monitoring). Blue: represents the -12V power line (providing EIA power to the serial port). White: represents the -5V power line (floppy lock phase data separation circuit). Purple: represents the +5V StandBy power line (power on a small part of the motherboard after shutdown) to detect various boot commands Green: on behalf of the PS-ON signal line (motherboard power on / off the signal line, there is a certain voltage when there is no connection) ATX power output all kinds of voltage role 2007-10-11 05:24 +3.3V voltage, through the motherboard voltage conversion circuit conversion, used to drive CPU, memory and other circuits. +5V is used to drive most circuits other than disks and optical drives. Control circuit including disk and optical disk drive. 12V: Used to drive a disk drive, a motor, a cooling fan, or to drive other boards through a bus slot on the main board. In the latest P4 system, as the P4 processor has a great demand for energy, the po