When troubleshooting folding Edit this paragraph the following faults in the maintenance, we should exclude damage and PCB board USB interface Weld, and USB extension cable to normal, and then repair to judge. 1. Nothing happens Maintenance ideas on U disk into the machine: According to the symptoms judgment, U disk machine did not work, and U disk tool to have the condition is the focus of our maintenance. U disk regardless of any program you want to work must have the following conditions: (1) power supply, power supply, and is divided into the desired master FLASH needed, these two is the key, and U disk circuit is very simple If no power inductors are generally insured damage, or damage to 3.3V regulator block U disk factory, comes regulator block and then say something here, which has three pins are the power input (5V), ground, power output ( 3.3), the working principle is that when the input pin a 5V input voltage, the output pin will output a stable 3.3V. As long as there is no where to be found is the source of power, the problem will be solved. (2) clock, because the master can operate at a certain frequency, with a communication should * FLASH clock signal for transmission, so if there is no clock signal, the master will not work. In this regard the circuit when checking metal U disk factory processing, in fact, a clock generation circuit is very simple, you only need to check the crystal and its peripheral circuits, due to fear of brush and U disk crystal compact crystal is easy to fall causing damage on the ground, as long as the replacement of the same crystal can be. Note: Crystal car can not be measured U-processing factory, the best way to judge the quality of the crystal is a good substitute judge. (3) Master zinc alloy U-processing factory, and if these two conditions are normal and that is the main chip damage. As long as the replacement of the master. Square lipstick line side holster U disk, U disk size: LOGO 88x29x10mm U disk real leather surface: Voltage imprint LOGO LOGO carved gilt LOGO silk textures. ◎ Rewritable more than 100,000 times ◎ seamless embedding structure, with superior seismic performance ◎ compatible with PC, notebook, Apple Computer ◎ have 512MB / 1GB 2GB / 4GB / 8GB / 16GB of different capacity and different colors and styles , alternative metal U disk factory processing, famous electronic (certified), U disk factory provided by Shenzhen Electronics Co. famous. Famous Electronic Co., Ltd. of Shenzhen City (www.minyoflash.com) Guangdong Shenzhen, a leader in digital accessories, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the famous electronic leadership with the staff warmly welcome all inquiries negotiations to create a better future for the famous electronics.