作者：Blade

stage lighting led with CREE Chips

In order to fulfill the US Energy Independenceand Security Act and the EU eco-design directive, the artificial lighting system transition from incandescent to energy-saving lamps (CFL) and LED, in order to save energy and reduce greenhouse gas emissions. Compared with the traditional incandescent bulbs, the new energy-saving lamps and light-emitting diode (LED) bulbs stage lighting led can save 70 to 85% of energy consumption, service life is also greatly increased, and therefore is considered to be a huge energy saving potential The technology, however, the design of these new bulbs than traditional light bulbs is much more complex, with potential adverse environmental effects, even with consumer electronics devices. CFL and LED components containing more metal. Uncertainty of the potential environmental impacts of these components is necessary to dispose reached the end of its working life, the need to make special provisions? Seong-RinLim published an article published this month, “Environmental Science and Technology” (Environ.Sci.Technol) LED potential environmental impact: metal resources, or toxic hazardous waste (PotentialEnvironmentalImpactsofLight- EmittingDiodes (LEDs): MetallicResources, Toxicity, andHazardousWasteClassification). Their three types of bulbs (incandescent, LED  stage lighting led and energy-saving lamps) in many aspects of the evaluation of the environment and resources.

stage lighting led with CREE Chips

After the test found that LED bulbs need to be gold, silver, antimony, copper, and so on resource consumption than incandescent two orders of magnitude, 2-5 times higher than the energy-saving lamps. Have a major impact on resource consumption for energy-saving lamps, material is copper. Silver and gold is a precious metal as a material resource crisis in the EU antimony. Copper in the United States has not yet reached crisis proportions, but in the energy saving lamp and LED, the amount of copper is very high, other metallic materials is 1-6 orders of magnitude, to develop also worrying. Most metal content in the LED lamp is aluminum, barium, chromium, gallium, and they will be obvious to result in the total consumption of resources. To note here is that on in Supplier consideration risk Although gallium reserves in the world is estimated to be quite large, it is still considered a possible crisis of material, because gallium only be obtained as a byproduct of the processing of bauxite and zinc ore . On the contrary, yttrium, gadolinium and cerium also belong to the rare earth elements, but less likely to become a crisis material, yttrium, cerium fairly abundant, the amount of gadolinium very little.

If the LED and energy-saving lamps at the current rate continues to replace incandescent bulbs, will have a considerable resource consumption, because the supply of gold, silver, antimony, copper resources are insufficient. As having a low electric resistance is mainly used for connecting the LED chip electrode wire. Silver as the stage lighting led in excellent reflective coating material. Antimony is a core material of the LED chip. Copper is used for the LED and energy-saving lamp coil and the printed circuit board. DfE these auxiliary components (non-light-emitting technology itself) there is hope for transformation and modernization in order to reduce the metal content, as in the information and communications industry, fiber-optic cable instead of copper cable. Additional examples of successful DfE actual product can be found in the U.S. EPADfE website. In addition to the transformation of the component technologies, recycling technologies and management strategies should follow up to ensure the recovery of precious metals in the LED and energy-saving lamps can be recycled.

Regulations of existing U.S. federal and California state government, through the application life cycle impact and hazard-based evaluation methods to assess whether these bulbs products to be classified as hazardous waste. Life cycle impact-based approach, with the conventional life cycle assessment (LCA) is different, it is to quantify the toxicity potential of LCA elements. The energy-saving lamp and the LED lights are to be classified as hazardous waste, because the loss of lead (132mg / L, 44mg / L, respectively, has been extremely excessive prescribed safety standards) and a high content of copper (111000mg/kg, and 31600mg/kg, and safety standards for 2500), Lead (CFL bulbs 3860mg/kg safety standards for 1000) and zinc (CFL bulbs 34500mg/kg safety standards for 5000), and the incandescent light bulb is not dangerous the. Note that results CFL lamp bulb mercury vapor is not considered, the experimental sample preparation process does not capture). Compared with incandescent lamps, energy saving lamps and LED lamps have a high potential to lead to resource depletion and toxicity, mainly due to their high aluminum, copper, gold, lead, silver and zinc.

 

stage lighting stands in LED application

In order to fulfill the US Energy Independenceand Security Act and the EU eco-design directive, the artificial lighting system transition from incandescent to energy-saving lamps (CFL) and LED, in order to save energy and reduce greenhouse gas emissions. Compared with the traditional incandescent bulbs, the new energy-saving lamps and light-emitting diode (LED) bulbs can save 70 to 85% of energy consumption, service life is also greatly increased, and therefore is considered to be a huge energy saving potential stage lighting stands The technology, however, the design of these new bulbs than traditional light bulbs is much more complex, with potential adverse environmental effects, even with consumer electronics devices. stage lighting stands CFL and LED components containing more metal. Uncertainty of the potential environmental impacts of these components is necessary to dispose reached the end of its working life, the need to make special provisions? Seong-RinLim published an article published this month, “Environmental Science and Technology” (Environ. Sci. Technol) LED potential environmental impact: metal resources, or toxic hazardous waste (Potential Environmental Impacts of Light- Emitting Diodes (LEDs): Metallic Resources, Toxicity, and Hazardous Waste Classification). Their three types of bulbs (incandescent, LED and energy-saving lamps) in many aspects of the evaluation of the environment and resources.

stage lighting stands in LED application

After the test found that LED bulbs stage lighting stands  need to be gold, silver, antimony, copper, and so on resource consumption than incandescent two orders of magnitude, 2-5 times higher than the energy-saving lamps. Have a major impact on resource consumption for energy-saving lamps, material is copper. Silver and gold is a precious metal as a material resource crisis in the EU antimony. Copper in the United States has not yet reached crisis proportions, but in the energy saving lamp and LED, the amount of copper is very high, other metallic materials is 1-6 orders of magnitude, to develop also worrying. Most metal content in the LED lamp is aluminum, barium, chromium, gallium, and they will be obvious to result in the total consumption of resources. To note here is that on in Supplier consideration risk Although gallium reserves in the world is estimated to be quite large, it is still considered a possible crisis of material, because gallium only be obtained as a byproduct of the processing of bauxite and zinc ore . On the contrary, yttrium, gadolinium and cerium also belong to the rare earth elements, but less likely to become a crisis material, yttrium, cerium fairly abundant, the amount of gadolinium very little.

If the LED and energy-saving lamps at the current rate continues to replace incandescent bulbs, will have a considerable resource consumption, because the supply of gold, silver, antimony, copper resources are insufficient. As having a low electric resistance is mainly used for connecting the LED chip electrode wire. Silver as the LED in excellent reflective coating material. Antimony is a core material of the LED chip. Copper is used for the LED and energy-saving lamp coil and the printed circuit board. DfE these auxiliary components (non-light-emitting technology itself) there is hope for transformation and modernization in order to reduce the metal content, as in the information and communications industry, fiber-optic cable instead of copper cable. Additional examples of successful DfE actual product can be found in the U.S. EPADfE website. In addition to the transformation of the component technologies, recycling technologies and management strategies should follow up to ensure the recovery of precious metals in the LED and energy-saving lamps can be recycled.

Regulations of existing U.S. federal and California state government, through the application life cycle impact and hazard-based evaluation methods to assess whether these bulbs products to be classified as hazardous waste. Life cycle impact-based approach, with the conventional life cycle assessment (LCA) is different, it is to quantify the toxicity potential of LCA elements. The energy-saving lamp and the LED lights are to be classified as hazardous waste, because the loss of lead (132mg / L, 44mg / L, respectively, has been extremely excessive prescribed safety standards) and a high content of copper (111000mg/kg, and 31600mg/kg, and safety standards for 2500), Lead (CFL bulbs 3860mg/kg safety standards for 1000) and zinc (CFL bulbs 34500mg/kg safety standards for 5000), and the incandescent light bulb is not dangerous the. Note that results CFL lamp bulb mercury vapor is not considered, the experimental sample preparation process does not capture). Compared with incandescent lamps, energy saving lamps and LED lamps have a high potential to lead to resource depletion and toxicity, mainly due to their high aluminum, copper, gold, lead, silver and zinc.

 

Shenzhen brakes play a vigilant role in professional led lighting

One side is China’s LED industry is lack of core technology, the other side is supported by the state LED among the strategic emerging industries; one sideis that LED products price drop of 35% for two consecutive years, the other side is  that LED Industrial Park across the country has built more than one hundred, its production capacity is gradually increasing.

At the end of last year, the newspaper published a “force to promote professional led lighting products is alleged to lead the industry disaster”, an earlier warning of the plight of the industry.

Shenzhen brakes play a vigilant role in professional led lighting

Recently, the Shenzhen municipal government quietly abolished the form of the “Official Gazette” March 2009 introduction of the “Shenzhen LED Industry Development Plan (2009-2015) on the issuance of the notice, the wind industry mutations. Turn Left or right? LED industry enter into a crossroads.

Shenzhen brakes play a vigilant role

Shenzhen’s policy change does not stop the other area’s fantastic to LED

Recently, professional led lighting forum in the northern city of Changchun, Changchun High-tech Zone and the Illuminating Engineering Society of Jilin Province jointly issued a written proposal of a province-wide accelerated to promote the use of efficient lighting products, LED energy-saving “Changchun High-tech Zone to build one hundred billion LED industry base planning debut at the same time.

Shenzhen Confucianism Electronics Co., Ltd. is a large LED NVC enterprises suppliers. According to the people in Confucianism electronic said: “we do not feel the policy adjustment have any effect on the Shenzhen Shenzhen Confucianism. Instead, corporate orders piling up, right not, they do not let the salesman go out to accept orders.”

Another  investment management Mr. Tang said to a newspaper reporter, his understanding of the Shenzhen LED enterprise products for Eastern Europe and other international markets, at present, do not see affected in any capacity.

Industry forecast, LED industrial structure of overcapacity situation will continue in 2013.

Industry experts said in an interview with a newspaper reporter, Shenzhen halt LED industry planning vigilant role in this industry, local governments still continue to blindly launch. Its loss may be incalculable.

The color lighting Game between the government and enterprises

“In fact, this is the game between government and enterprises.” Used to hold different views, Guangdong Province, vigorously promote LED color lighting, and a letter to the Science and Technology Department of Guangdong Province, Guangzhou color lighting industry professionals Hu Jun, in the “China Business” reporter interview, said: “the local government should build land finance, with the establishment of high-tech park to attract business investment to pull the GDP like LED fancy high-tech subsidies and vigorously promote government executive order market.

The color lighting Game between the government and enterprises

Government established industrial park, it was because the industry is defined as high-tech industries, the government hopes to bring more tax revenue, it will give a certain amount of subsidy, this industry will become bigger and stronger, in order to create hundreds of billions of tens of thousands of million companies. “Hu Jun” China Enterprise News “reporter provides a data: after several years of fostering, LED enterprises in Shenzhen is only output value amounting to billions of dollars, but if the Government determine the development of the Internet or biological emerging strategic industries, just a project over $ 100 billion this industry, facing land resources are so scarce in Shenzhen, the government is clearly to give up. ”

“I have seen LED Industrial Park, the scene was tattered but brand stand up, and then you can go to the mortgage.” Hu Jun, “China Enterprise News” reporter he had ever seen a LED color lighting Industrial Park,”Most are to hit the ground, put forward a plant, and then lie to the government subsidies. Now the government is not so easy to cheat, usually if you do not do, I have not been replaced, the government is now very sensible.”

However, the Science and Technology Department of Guangdong Province, Shenzhen approach does not seem to fully agree with. “China Enterprise News” reporter a telephone interview with the Director of the Office of Science and Technology Department of Guangdong Province, Lin Xiaoyong, he said, the Guangdong Provincial Science and Technology Department is not clear Shenzhen halt led dimmable light bulb industry planning, no matter for whatever reason, Guangdong Province will still insist vigorous support to the industry.

led theater lights in China

led strip light color pure, brilliant color, high brightness, energy saving, long life, safe and reliable, and gradually cut a striking figure in the decoration industry. Led light bar is the launch of new products in recent years, some customers did not come into contact with, it is unclear for how to install.
led light bar used for interior decoration, waterproof, UV less demanding, installation is relatively simple. Shang Mingguang electricity production of LED light bar, for example, each LED theater lights flexible strip behind affixed with self-adhesive 3M double sided tape, installation torn 3M double-sided adhesive sticker on the surface, then the LED light strip is fixed at installation location, hand snapping like it. As for some places need to bend or LED light strip length is inconsistent. LED strip is composed of three LED for a group of series and parallel circuit structure, that can be cut every 3 LEDs can cut short can be welded up.
LED Stage Lights strip for outdoor due to be affected by rain, ultraviolet erosion, 3M adhesive fixed a long time will result in a decrease in the 3M adhesive LED strip off, so the installation of outdoor LED theater lights  flexible strip is often used slot in a fixed manner. Need to be cut and connected, and indoor installation, just need another with waterproof glue to strengthen the connection point of the waterproof effect.

led theater lights in China
LED strip General voltage is DC 12V, and therefore requires the use of switching power supply, the size of the power supply according to the power and length of the LED light bar. Can also buy a power switching power supply for total power, all LED flexible strip all the input power in parallel (wire size is not enough, then you can otherwise extended), unified by the total switching power supply. The advantage is that centralized control the inconvenient places lighting effect can not be achieved single LED theater lights bar and switch control, specific to the manner in which you can have to measure.
Happy LED strips and RGB strips need to use the controller to achieve a color-changing effects and control the distance of each controller is not the same, general, simple control of the controller a distance of 10-15 meters, control the distance of the remote controller 15-20 m, can control up to a distance of 30 meters. If the connection distance is longer, the controller can not control so long LED strip light bar, then you need to use the power amplifier to tap.
LED light strip on the distance of the connection. 3528 SMD series LED strip connect it to the maximum distance of 20 meters, and 5050 series LED light bar, maximum connection distance of 15 meters. If the connection distance is exceeded, the LED strip is easy to heat, the use of the process will affect the service life of the LED light strip. Therefore, the time of installation must be installed in accordance with the requirements of manufacturers of LED light bar, should not overload operation.
When install LED light bar, to consider the following questions: waterproof rating, total power, power supply, controller.

theater lighting equipment in China

With the Earth’s resources become increasingly scarce, the basis of investment costs of energy are rising, and a variety of safety and pollution problems can be described everywhere, solar energy as an “inexhaustible” security, environmental protection and new energy increasingly the more important. , But also with the development and progress of solar photovoltaic technology, solar power is also the development of the theater lighting equipment field of street lighting is maturing.
Installation of solar street lights required tools and equipment: Multimeter, wrench, thin wire, nylon cable ties, shovel, from the sling (the material is soft belt; For wire rope, wire rope must be wrapped in a cloth belt or from the transfer lamps pad soft objects to avoid damage to the lamp body), cranes, lift trucks, and so on.

theater lighting equipment in China

1, the battery installation requirements theater lighting equipment:
1) removal of dirt and other debris in the cement trough solar street light foundation placed in the battery compartment, ensure that the drainage holes no blockage;
2) inspect the battery compartment for damage and simultaneous detection of battery voltage is normal, should the abnormal as unqualified products, prohibit the installation. With insulating tape wrapped jacket line poles.
3) disassembly of the battery compartment with a crane lifting into the pre-lay the foundation inside, and then put on two pairs of wire hoop after the battery cable through the cage prefabricated pipe connecting hose, prefabricated pipe evenly coated with a layer 7091 after the sealing silicone connecting hose plug the other end into the root of the prefabricated pipe, using a slotted screwdriver on the two-wire Ferrule bolt. Subject to the battery line wear clothing from the prefabricated pipe and then put on a threading hose to put on two pairs of wire hoop, threading hose, prefabricated pipe evenly coated with a layer of 7091 after the sealing silicone soft threading tube into the root of the prefabricated pipe bolt on the two-wire Ferrule with a flat-blade screwdriver, and finally the battery cable fixed to the nozzle.
4) Clear the foundation put a cover at the soil, sand and other impurities;
5) from the transfer cover, placed in the foundation and placed flat. When the cover is placed to avoid sediment around the foundation fall into the foundation;
6) covered with asphalt and sand theater lighting equipment mixture (asphalt: sand = 1:3) cover and cover around 40mm;
7) fill to cover clay or concrete. Filled and capped clay or concrete, each one providing a cover 10cm, rammer and solid until higher ground 10cm;

 

stage lighting suppliers in China

P6 outdoor waterproof LED display SMD3535 table mount technology outdoor full color LED display series of new products. The new outdoor SMD full color LED products has a wide viewing angle, color mixing, high contrast, good stability and many other advantages, is Hao Sheng LED display for outdoor high-end applications market launch of a flagship product, and will further meet the outdoor LED stage lighting suppliers large-screen high demands on the stability and visual effects two indicators.

stage lighting suppliers in China

The face of growing demand of the market for high-definition display condition, the traditional plug-in oval LED clearly does not meet customer needs. Outdoor full color SMD SMD has wide viewing angle, light distribution, mixing good, high contrast and easy-to-automated production advantages, gradually become the mainstream of future outdoor LED display light-emitting device. SMD3535 series Sheng Hao this release is the latest launch of the first high-end LED the outdoor HD display products, has successfully mass production. The product has a patented moisture, moisture level two; with super anti-UV, anti-curing capability can be used for long-term outdoor; has a high-definition, high-resolution, ideal for outdoor high-density screen; and brightness of up to 7000mcd .

In today’s highly competitive market, in order to help customers improve competitiveness, Shenzhen Sheng Hao as a channel service of LED application products brand professional manufacturer, need to understand customer needs, personal good customer service, so SMD3535 Series LED display product performance play to the best, and provide customers with one-stop solution, enabling customers to do “to that war, the war will be won. Based on this, the R & D department for optical, thermal, SMD3535 lamp beads maximum operating temperature with LED screen brightness relationship, SMD3535 maximum screen brightness and LED spacing relationship, LED display stage lighting suppliers cabinet design aspects of a comprehensive and detailed analysis to the user to improve efforts to ensure that the most stable, and experience the best, most competitive outdoor full color LED electronic display products.

HD and stable Sheng Hao for LED display applications continue to seek a breakthrough in the two areas. In the indoor HD LED field, Shenzhen Sheng Hao was in 2010 that is the first to introduce PH3, PH4 variety of indoor ultra-high-definition LED display stage lighting suppliers products, new high-definition LED application products launch speed ahead. From the Marketing Department was informed, of our indoor ultra-high-definition products has applied to a of CCTV CCTV studio, including a number of key occasions. Sheng Hao HD products have won a good reputation in the market. At the moment, we are also convinced that SMD3535 Series LED display products will live up to, and continued to win praise Sheng Hao.

stage lighting company in China

With the rapid development of the international electronics industry, the economy pick up, reflow soldering equipment as a surface mount soldering equipment domestic brands become the main force quickly occupy the international market, the domestic models to cost-effective advantage. Reflow development in recent years to its peak, appearing on the market low-cost low-quality reflow soldering. Electronics  stage lighting company manufacturers in the purchase of reflow, the price gap is too far away I do not know where to start, I hope below can give you some inspiration.

How to choose a good reflow:

stage lighting company in China

Reflow quality and has a very close relationship, and has the following main parameters affecting the quality of reflow:
A temperature control accuracy of soil 1 ° C (theoretical value):

Affect the temperature control accuracy and reflow heating with the heating mode of heat transfer:

a: heating wire heating element (usually imported nickel-chromium wire wound heating element), such fever general exchange rate is relatively high, long life

b: infrared tube heating element (infrared heater) stage lighting company imported materials, such heating element radiation, good uniformity, but the color temperature difference and produce mainly used for thermal compensation area, does not apply to the welding zone

c: heating tube heating element, such heat pipe heat efficiency is low, if not through the hot air, poor uniformity of heating surface (typically using less)

Heated heat transfer mode: full of hot air circulating (good) and hot air circulation + infrared composite (good) and infrared formula (poor)
Transmission with a lateral temperature requirements of the soil below 5 ° C, it would be difficult to ensure the welding quality.

High-quality reflow can generally be controlled at the soil 2 ° C / the soil 3 ° C (MCR series and ROHS Series)

Belt width to meet the requirements of maximum PCB stage lighting company size.

The PCB the 200MM network with application selection 300MM, according to the on your PCB choice width: general: 300 350 400 450 500MM select

The larger the width of the reflow power will be greater, so choose the right is the most important

4 The longer the length of the heating zone, the more the number of heating zones, the more easy to adjust and control the temperature curve. The general small batch select 5-6 zone, the reflow oven that is able to meet the requirements of the heating zone length of about 1.8m. In addition, the upper and lower heater should be independent of temperature control, in order to adjust and control the temperature curve.

Standard lead-free production we usually 8 temperature zones, according to different production requirements can be divided into S Series M Series the MCR series ROHS series, in terms of control have instrumented touch-type (optional) computer-based control systems: computer systems with Siemens systems must test its computer crashes or removed, will affect production, the IPC system board versatility bad, do not have the storage function, select the computer reflow Once the computer system will not be able to use equipment the low cost of such systems, the procurement of such models is not recommended.
(5) The maximum heating temperature is generally 300 to 350 ° C, considering the lead-free solder or metal substrate should be chosen above 350 ℃.

Different reflow insulation properties, low-end products are generally insufficient insulation, the maximum temperature is usually less than 300 degrees, the general requirements of the design temperature can reach more than 300 degrees mid-range reflow design over more than 320-350 if the radiator welding Reflow 400 degrees
Conveyor belt running smooth belt vibrations will cause the shift, suspension bridge, cold welding and other welding defects.

Middle and low reflow, the transmission mechanism is relatively simple, there will be a little vibration, the force front MCR ROHS series high stability synchronization device generally can solve the above problem.

used stage lighting for sale

Last year, China’s LED lighting industry output value of over 200 billion yuan, an increase of 32% over the previous year; product quality pass rate increased by 30%, the output and quality of double upgrade.
According to the China Quality Daily reported, LED lighting industry has become one of China’s most important emerging strategic industries. Two years ago, more than 2,600 more than the LED lighting business, employing more than 100 people, the scale of the industry has been ranked first in the country. However, due to LED lighting products,  used stage lighting for sale high-speed updates, product standards development cycle can not keep up with the pace of technological development on the one hand, a lack of standards and hysteresis phenomenon, while restricting the rapid spread of technological innovations, but also created the problem of product quality control; another On the one hand the development of standards revision process many links from drafting to publishing the implementation cycle is long, some indicators even in the face of standards promulgated situation that is out of date, the lack of scientific assessment based on the quality of LED products, disorderly market competition, product quality varies greatly, has seriously hampered the healthy development of the LED industry.

used stage lighting for sale
2012, China Quality Supervision Bureau to promote the standardized system of emerging industries, to enhance the competitiveness of the new round of industrial development, technical support to the National Institute of Standardization, the development of the emerging LED lighting industry standard system development planning and roadmap . used stage lighting for sale Roadmap for the industry characteristics, planning, formulation of standards revision and implementation steps proposed key technical standards in the next few years, the development of revised and Implementation Guide, an important guiding role and significance of the effective implementation of the strategic emerging industry technical standards planning.
The past two years, the China National Institute of Standardization according to the road map, the benchmark system planning and requirements, organization full of leading enterprises, research institutes, testing organizations, industry associations, a total of 134 units, from the semiconductor lighting technology and product research, development, production standardize enterprise; establish product quality evaluation system, the benchmark index as technology development soared to maintain standards and synchronization of the R & D technology to achieve the dynamic assessment of the quality of LED lamp technology, dynamic LED lighting products, LED used stage lighting for sale products the benchmark index The quality evaluation system covering all fields of the industry chain, prompting a decline in the cost of production of LED products, production and economic efficiency of enterprises has improved.

stage lighting usa in LED application

We use LED display alerts, occasionally encountered LED display black screen phenomenon, sometimes the screen is in use is normal, suddenly black, black sometimes appears in the sending program content, sometimes just turned on the electricity instantly black black state occurs, but in the process control system uses the same kind of phenomenon may be caused by a variety of reasons, even the LED display black also due to different operating or different environments. Encountered this phenomenon please do not worry, we can refer to the following aspects to determine the “fault” and the exclusion.

 

stage lighting usa in LED application
Make sure to have all the right power control system, including all hardware. Also, note that the positive and negative terminals of the power supply if there is reversed, then the wrong stage lighting usa. (+5 V is positive, GND is the negative.);
2 If you are using a wired control card, check and repeatedly confirmed the serial cable is used to connect the controller loose or peeling. (If the release of information on the way black is likely to be caused because of this reason, in the communication process is interrupted communication lines loose,

Hence the screen black. Do not think the display body did not move, it is impossible to loose line, hands-check, which is very important that you want to solve the problem quickly. );
If you are using Ling Guan GPRS wireless control card, on his way to publish information black, need to re-query whether the control card online, online re-released program information after the success of the screen to light (due to GPRS control card performed Ads

The stage lighting usa action is off-screen to open the screen action, if you publish unsuccessful, then it send instant off-screen, you can not start the opening screen action, which led LED display black screen);
4 If you are using Ling Guan wireless the GPRS control card, LED display found in the use sudden black screen is not lit, the operating software to query the clock, and then proofread the clock, LED display to light up work;
5 If you are using LED control card is the motherboard HUB board, please check and confirm whether the LED stage lighting usa display and connected to the main control card HUB distribution board tight junctions, is inserted backwards. Please check and confirm connecting Ling consistent control cable between the card and HUB distribution board Loose or inserted upside phenomenon.