| Problems |
Reasons |
Solutions |
| 1.All LEDs blink |
Contact Failure |
1.Fix the loose places
2.re-plug |
| 2.LED appears dark |
Switching power is inconsistent with LED’s rated voltage |
Make sure switching power is conforming to rated voltage of LED |
| 3.LED lamps on some circuit can’t be on |
1. Connect direction may be wrong;
2.Cable of output power may be wrongly connected;
3. Power cables may be reversely connected; |
1. Connect it correctly;
2. Make sure the red cable is connected to the anode, and black cable to cathode;
3. Find out the reversely connected cables, then connect them correctly. |
| 4 .All LED lamps can’t be on |
1. No power output from switching power;
2. Output cables may be wrongly connected. |
1. Connect the commercial power to the input port of switching power;
2 .Make sure the anode and cathode of power cable are correctly connected. |
| 5.The whole screen does not light or appears pane |
1. if the host is started;
2. if the communication line is connected well;
3. if the sending card is plugged in;
4. if the data line between the graphic card, sending card and receiving card is connected well;
5.he position of receiving card JP1 or JP2 is incorrect; |
1.Open the host machine;
2.Plug well the communication line;
3.Replugged the sending card;
4.Connect well the data line between the graphic card,sending card and receiving card;
5.Adjust well position of receiving card JP1 and JP2; |
| 6.In the whole screen, the data glitter or keep lighting every 16 lines |
Check the settings in LED studio |
Open LED studio, open the debugging,hardware setting password 168 system setting set the row sequence as +0 or +1 |
| 7.Every time when starting LED studio,there is a hint:Controlling system cannot be found |
The singal collecting line between COM port to sending card doesn't connect or the COM port of the computer is broken |
Connect data line well or change computer |
8.The images in the whole screen are shaking or ghosting
|
1.Check the communication line between the computer and LED screen;
2.Check DVI line of graphic card and transfer card;
3.Sending card is broken; |
1.Re-plug in ore replace the communication line;
2.Strengthen DVI line plug;
3.Change sending card; |
| 9.One unit panel do not light |
1.If +5V electricity or GND supply;
2.If+5V and GND are short circuit;
3.If the OE signals of 138 no.5 leg exixts;
4.If the OE signals which connected with 245 are norma(open circuit or short circuit) |
1. supply +5V electricity or GND
2.cut the short-circuit part
3.supply OE signal connect the open circuit part cut the short-circuit part |
| 10.One unit panel upper half or lower half do not light or display unnormally. |
1 .if the 5 th leg of OE signal of 138 exists .
2 .if the no. 11 and 12 leg signals of 74HC595 are normal(SCLK,RCK).
3.if the connected OE signals are normal; open circuit or short circuit .
4.double row pins and the signal of SCLK ,RCK connected with 245 are normal .open circuit or short circuit . |
1.connect OE signal
2.connect SCLK.RCK signal well
3.connect the open circuit part cut the short-circuit part
4.connect the open circuit part cut the short-circuit part |
