Basic knowledge of CPU power supply circuit (switch) - revised

describes the basic knowledge of CPU power circuit. ① single-phase power circuit structure and principle * Single-phase power circuit structure and principle *
Main PWM circuit chip CPU, MOSEFT tube, inductance, capacitance of four components. Main PWM circuit chip CPU, MOSEFT tube, inductance, capacitance of four components. MOSEFT tube which is an electronic switch (such as the image above K1, K2), but the high frequency switch, second switch from 10,000 to 15,000 times. One MOSEFT tube is an electronic switch (such as the image above K1, K2), but the high frequency switch, second switch from 10,000 to 15,000 times. Inductors and capacitors from the two roles here, save energy and filtering. Inductance and capacitance from the two roles here, save energy and filtering.

motherboard cable connection method

We installed a new machine when the connection will find a lot of need for connection on the motherboard. We installed a new machine when the connection will find a lot of need for connection on the motherboard. For hard drives, CD-ROM device to connect all of these are not unfamiliar. For hard drives, CD-ROM device to connect all of these are not unfamiliar. But some smaller cable or puzzled many friends, such as pre-usb cable, front audio cable, power switch, hard drive indicator light This type of cable. But some smaller cable or puzzled many friends, such as pre-usb cable, front audio cable, power switch, hard light of this type of cable. Today, computer repair network for friends summed up what so on cable connections, and I hope to you solve practical problems. Today, computer repair network for friends summed up what so on cable connections, and I hope to give you solve practical problems. (This article from the computer maintenance network) (This article is from computer repair network)
USB Interface USB Interface

EPSON Stylus Printer micro-adjustment

EPSON stylus printer will print the bottom line to the second page


Causes and solutions: Causes and solutions:
Fine-tune the printer to adjust the upper and lower margins,

ALL NEW MOBILE UNLOCKING CODES

Motorola all machines lock: Press MENU +5 +1 / 2
T190 unlock code: 20010903 T190 unlock code: 20010903
T191 unlock code: 19980722 T191 unlock code: 19980722

3X8/2X88/998/8088/L2000/7689/T189/C289 such as the initial password is 1234; phone password is 000000; unlock method: If there is no test card, the first input 1234, such as the password has been changed, press the Menu key would lead to "modify the lock code", press OK key, then enter 000 000 four-digit phone password is displayed if the security code has been changed, you can only test card or software tools solution. 3X8/2X88/998/8088/L2000/7689/T189/C289 such as the initial password is 1234; phone password is 000000; unlock method: If there is no test card, the first input 1234,

MOTHERBOARD South bridge bad way to judge

1. Play PCI A14 of the resistance, on the ground less than 80 Euro for the South Bridge bad.
2. Standby, South Bridge hot, bad for the bridge. 2. Standby, hot south bridge, the bridge bad. (Excluding AGP supply pipe damage.) (Excluding AGP power tube is damaged.)