The front USB wiring scheme is a large-floating chassis front USB how to connect, there is a certain difficulty for some novices, know that once the wiring is wrong, it is impossible to use a USB device, and the USB device or motherboard is burned. A friend of the author caused its MP3 player to burn with USB Logiteram. Some feelings, the author feels that some relevant content you know will be introduced to the majority of readers, and the role of a throwing brick. The definition of the front USB wiring of the chassis first is first or understand the definition of the front USB of the front USB on the chassis. Red Wire: Power Positive (Identification on Wiring is: 5V or VCC), white line: negative voltage data cable (identified as: Data- or USB port -), green line: positive voltage data cable (identified: Data or USB Port ), Black Line: Ground (Logo: GROUND) Motherboard USB Pin Definition Let's take a look at the USB pin definition on the motherboard, although the USB pin definition in each brand motherboard is different, but not more than Several types and wiring methods: First Class: 8 needle type This type of pin is mostly used in the motherboard produced before 1999, but currently a few P4 (low-end) motherboards also use this type of pin. Usually Wiring Method: Insert the red line into the USB pin 1 with the pin 2, the remaining wiring Press Data-, port , the order sequence separately into the remaining USB pin. ●, the second wiring method is the second set of USB wiring and the first set of wiring. In contrast ●. Second Category, 9-pin type, the type of USB pin is mostly the newly new motherboard, more common to support the motherboard of the Pentium 4 or Athlon XP chipset (such as I845D, I845E, I845D, SIS 650, etc.), especially support USB2. 0 motherboard. This type of USB pin wiring is more unified ●, can be used in most motherboards. Third category: 10 needle types use this pin type of product is mostly uses the motherboards of I815, I815E, I815EP, KT133 chipset, and the next two types should be much more chaos, summarizing the results. Method, first type ●, second ●, third ●, fourth ●, fifth ●. In the above three types, in addition to the second type of pin, it can be installed directly according to the author's connection, in general, there is no mistake. First, three types of conditions are more troublesome, using these two pin type motherboards have considerable part of their specification, there is no detailed la way of wiring, so it is best to ask the motherboard manufacturer in various ways (email, phone, etc.). General vendors will give reply. It is really not possible to measure the multimeter, to engage in the pin 5V power supply and the ground, will never have a lot of problems. Generally, the pin 1 is the first set of USB power positive, the resolution pin 1 method is to see the identity on the motherboard, some direct labeled "1", some of which are black triangles or use white thick lines. After the wiring is connected, it is best to use a USB mouse if there is a condition. There is also some brands of motherboards If the two front USBs connect to the USB device, one of which does not work properly, this belongs to the BUG of the motherboard, two front USBs are still used separately. - Transfer from "Computer Lovers"
