Maintenance LED display

Posted on 9/5/2011 at 11:43 PM - Link

1, short-circuit detection, the led module transferred to short-circuit detection block (usually with alarm functions, such as the lead General beep sound) to detect whether there is short-circuit phenomena, and found to be immediately resolved after a short circuit, short circuit is the most common led display screen module failure. Some have observed the IC pins and pin pins can be found. Short-circuit detection circuit power should be the case in the operation, to avoid damage to the multimeter. This method is most commonly used method, a simple and efficient. 90% of the fault can be detected by the judge.
2, the resistance detection method, the LED lights transferred resistance profile to detect a normal circuit board of a point to ground resistance values??, and then test another piece of the same circuit board with a point and the normal resistance test whether there are different, if the difference is to determine the extent of the problem.
3, the voltage detection method, the transferred voltage profile multimeter, test the suspected point of a circuit to ground voltage, the comparator is similar with the normal, you can easily determine the LED bulbs of the problem.
4, the voltage drop detection, will be transferred multimeter diode voltage drop test file, because all of the IC unit are many pieces from the basic composition, but small, and so when it's a pin on a current is passed, there will be voltage drop in the pin. Generally the same type of IC is similar to the same pin drop, according to the pin on the voltage drop more good or bad, to be without power in the circuit operation.
Second, LED light essential tool maintenance

Home Building Materials

Posted on 9/5/2011 at 11:42 PM - Link

Consultant and author in the projection screen industry, consulting, and found that the vast majority of enterprises are private enterprises, private enterprises and owner of most of these are self-made owner of a grass-roots origin. This is China's most dynamic business owners inside one of the groups, but also in business management, the most likely to make mistakes, detours one of the groups. Lead to easy to make mistakes, detours because one of their own limitations, such as character, vision, vision, structure, knowledge, background and other limitations; second home building materials industry is a sunrise industry in itself, in itself immature, can be "brought ism, "much, do not mature patterns and templates can be copied, all business owners are" feeling the stones ", most believe in" no matter black or white is a good cat catches mice, "the short-term pragmatic theory. An interesting phenomenon is that in the oil absorbents industry, even a sub-industry peer companies, each company's organizational structure, departments are not the same name, functions and responsibilities are different, which shows that from the side the immaturity of the industry.
Author based on their years of large enterprises and small and medium private enterprises work experience, combined with their in home building materials companies and consultants working within the personal experience, summed up China's home-building materials business owners' top ten business Achilles heel "for all" see the game better "China's engineered wood flooring business owners are a wake-up call and prompt, hope can have on business owners in the actual management of the process and avoid detours, fewer mistakes have been helpful.
Achilles heel is the largest business enterprise culture, why not drop the old way. More and more employers recognize the business, the more the more need for the development of corporate culture. Boring hard bosses like to think out the whole set of corporate culture, hanging on the wall, written in the manual, the General Assembly will put, but also for staff training, can be is the "thunder, little rain," Most became the "oral culture", "wall culture", "to cope with culture." Push in the enterprise culture is not open, not to fall and cause the boss is very large. This result because the majority of employers do not know that he is the corporate culture, corporate culture, culture is the boss, the boss if there is no culture and a "no culture" of corporate culture. The boss's words and deeds, especially the behavior of things, the management of the words and deeds, is the corporate culture. Not all the way down because his boss thought that the gift mugs of a good culture, its own culture and set an example of doing another set, the result is a culture of "mismatch" with each other separate, even contradictory, the boss of the staff in the corporate culture, the heart is not very recognized and personally, management and junior staff even imagine. The result is the boss culture and corporate culture are two parallel lines, never the intersection, there can be landed.

Evaluate the quality of communication power

Posted on 9/5/2011 at 11:41 PM - Link

High quality power supply uninterrupted ball mill system of communications, high-quality supply base and protection. While we continue to improve testing standards and testing methods, the implementation of network communications and power equipment selection system, but we use and operation of the process will inevitably lead to some misunderstanding or some of the misleading of the confusion. To this end, we have a comprehensive analysis of scientific determination, based on the summary of some experience, and in the power supply in this research, production, use of peer discussion.
Output power and efficiency to evaluate the quality of the most important technical indicators
Is the gasoline generator conventional indicators such as accuracy, distortion, balance, conversion time, dynamic response, at present, many power supplies have reached a high standard of the product indicators, but the actual use of high index is not necessarily needed. A certain level of performance, product quality can not be determined merits of the standard. Determine product strengths and weaknesses of the most important indicator is the reliability of power supply products to improve reliability is the eternal theme, left to talk about advanced reliability and usability are meaningless. The reliability indices are generally based on reliability design and a lot of statistical data for comprehensive assessment, a short time is difficult to detect proof, but we can detect the output power and efficiency to assess its reliability. Products in the same specification, the output capability means that in normal circumstances is not running at gasoline generator, as well as reserves of energy, less failure; high efficiency means low temperature. Meet the requirements of such products in general can be considered reliable. Here the light of the specific equipment to be reviewed.
(1) centralized monitoring and management system
The current communication power, computer room air conditioning centralized monitoring and management system should be further improved and put into operation in the construction of the system should focus on the DC system, especially in the main battery (based power system-48V), generator start Battery, UPS battery back-up of intelligent management, can be set from time set for the three remote point, it should not set, do not set the remote signaling point repeatedly, but to strengthen the alarm set point, laundry equipments should come first .

5 high-speed USB recommended

Posted on 9/5/2011 at 11:40 PM - Link

According to foreign media reports, USB flash drive storage products has been one of the most talked about topic. In this fast-paced information age, speed and capacity of consumers are very concerned about two issues. Choose a fast, high-capacity flash drive, to store and carry your massive files, not only stylish and practical. Recommended for everyone in this 5-use equipment, see if there is suitable for your product.
Corsair Flash Voyager GT 32GB A-DATA is a new Corsair Flash Voyager family of products in one, eye-catching sleek look and bright color to make it different from the traditional design of the apple accessories, full of style.
Up to 32GB of storage capacity thanks to Corsair Flash Voyager GT Flash Drive to easily respond to the user should move for the large-capacity storage needs.
In the end we can see the product's USB work lamp and perforated for easy carrying strap, light and lanyard hole designed into an oval-shaped and decorated with oval-shaped front, both beautiful and generous.
In addition to beautiful, high-capacity advantage, the test found that Corsair Flash Voyager GT auto code scanner sustained read rate of up to 28MB / s, comparable to the hard drive.
Automatic door features a unique rubber material, in addition to hand-held feel more comfortable outside, but also to use the product more secure. Strengthened waterproof and dustproof and shock performance and reduce accidentally fell into the water or fell to the floor of the damage, so the user such as rain and other wet environments can also ease of use.