Technical support and maintenance

 

　　　 Basic Knowledge

1.Pixel:
   A pixel is the short name for picture element. It is the smallest component of the display that can be individually controlled. 

2.Pixel Pitch: 
   A pixel pitch (or Center-to-Center Spacing) is distance between the centers of one pixel to another and measured in millimeters (mm). 

3.Module:
   A module is the minimal unit that can display data or a combination of a fixed number of pixels.

4.Resolution:
   Resolution is the total pixels in a single display. The higher resolutions make better display quality.

5.Luminance:
   Luminance of LEDs is measured using nits (cd/m2),

6.Viewing Angle:
   The viewing angle is the total spectrum that the characters and graphics can be seen clearly.

7.Viewing Distance?
   Measured in meter, the maximum distance, the character graphics in display can be seen clearly.

8.How to select the right LED display that can be used in customized environment. 
  - Effective viewing distance and actual space. 
  - Pixel pitch and resolution 
  - Unit cabinet mounting area calculation 
  - The space of installation and maintenance for LED display 
  - The affection between LED display dip angel and viewing distance. 

9.What is the customers display content? 
  - Text display: Depend on text dimension and resolution. 
  - General video display: 320x240 Pixel resolution. 
  - Digital standard DVD: ≥640×480 Pixel resolution. 
  - Complete video display：≥800×600 Pixel resolution.

10.What is the requirement of luminance for LED display. 
  -Indoor：>800CD/M2 
  - Semi-indoor：>2000CD/M2 
  -Outdoor(while LED display faces North)：>4000CD/M2 
  -Outdoor(while LED display faces South)：>8000CD/M2

11.What is the requirement of luminance for white light that is composed of RGB LED?
     With mass experiment, the proportion for white light can be suggested as follow:
     Simple suggested RGB luminance proportion: 3：6：1
     Precise suggested RGB luminance proportion: 3.0：5.9：1.1

12.How to calculate the white light luminance for each single pixel?
     Example: Pixel Density: 2500pixel/m2, 2R1G1B, luminance:5000 cd/m2.
     Red LED luminance: 5000÷2500×0.3÷2=0.3cd
     Green LED luminance: 5000÷2500×0.6=1.2cd
     Blue LED luminance: 5000÷2500×0.1=0.2 cd
     Luminance of single pixel: 0.3×2+1.2+0.2=2.0cd

13. Can SMD LED be used for outdoor LED display?
Cannot, Outdoor LEd display requires higher protection level(at least IP65), SMD can not meet this requirement and endure outdoor envirnment.
Higher brightness will be needed for outdoor LED dispplay, at least 4000Nits. SMD LED still can not meet this requirement at this moment.

14.How many pixels can be controlled by one set of control system?
DVI interface, two basic color:1600×1024 Pixels
DVI interface, full color:1024×512 Pixels

　　　Technical support and maintenance

To ensure our product to be operated under reasonable conditions. Please carefully read the description of procedure and then proceed the next step of LED display installation and adjustment.
(use hardware check list to check items )
LED display, data transmission cable, power cable, data transmission card(shall be installed in PC), data receiving  card(shall be installed in LED display), one set of PC(include DVI interface and serial port), and accessories.
☆(Installation Procedures)
(hardware installation) Procedures as follows：

1.install DVI graphic card into AGP slot of main board and then install card driver into PC.
2.Install data transmission card into PCI slot.
3.Connect data data transmission card and graphic card by DVI cable.
4. Connect cable to Cate.5 port.
5.Connect  Cate.5 cable to data receiving card’s RJ45 port.
6.Double check connection and proceed setting.
Software installation Procedures：
1.Graphic card driver installation
　Put Graphic card driver CD.
　Please install DirectX8.1first and then install graphic card driver, finally install control panel.
2.Player software
Install LED display player and other control software,
☆LED display operation procedure.
Turn on: Please turn on PC and then turn on LED display
Turn off: Please turn off LED display first then turn off control software, finally turn off PC.
(Questions)
Please double check if each cable is connected correctly.
2. Double check if software is installed completely.
( Caution )
1.To follow the operation procedure that described in the users manual.
2.Anti- moisture, the requirement for humidity: Work at Maximum condition, LED must be below the relative humidity, 92%
3.Proper temperature : Working temperature, -20 , 80c Storage temperature, -40 to 60
4.Power source requirement. LED Display Voltage: 220V+- 10: 

 Any question during operation, please check our manual or contact us soon.If our description mentioned above can not 100% cover all the operation, we will perfect them step by step, and also, your feed back will be beneficial for us to modify them continuously.

 

　　　LED module trouble shooting and solving

 1.

   　 Phenomenon: All LEDs are flashing.
　　Problem: Poor contact
　　Corrective action: Re-fixed or replug the parts that are loosen.
2.
　　Phenomenon: LED Dim.
　　Problem: The voltage on the switch is not identical to the voltage marking on LED.
　　Corrective action: ENSURE the consistence.
3.
　　Phenomenon: LEDs do not work.
　　Problem:
　　　　　　1. Plug in reversely.
　　　　　　2. Confirm the output wire is correct.
　　　　　　3. Power core plug in correctly.
　　Corrective action:
　　　　　　1. Pull out the plug and re-plug in.
　　　　　　2. Ensure the red wire connect to + polar and black wire to the – polar.
　　　　　　3. To find out the plug that are partly error in the direction.
4.
　　Phenomenon: All LED do not work.
　　Problem:
　　　　　　1. No power transmitted from switch.
　　　　　　2. Confirm the output of power switches are correct.
　　Corrective action:
　　　　　　1. To connect the power to the switch.
　　　　　　2. To check the polar.                                                      

 
XICCO Optoelectronics Technology Co., Ltd.   Tel:+886-2-2791-2263    Fax:+886-2-2790-7712
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