The display has: computer control part, display drive matrix,
LED display array, power supply four major parts.
There are many problems where there are:
1. Interface problems. Symptom: Computer information cannot be displayed. Check the cable 2. Power problem.
The LED display uses a low-voltage, high-current power supply, which is not significantly different from the ordinary DC power supply. 3. Driving problems. Each row or column is not displayed, that is, the corresponding driver circuit (chip) problem, replace 4. Display problems. Long-term use of LED display may damage the aging, maintenance can be replaced.
LED display common troubleshooting process diagnosis process:
1. Determine if your display is a synchronous or asynchronous display;
The display of the synchronous display depends on the settings of the display, and the asynchronous display does not depend on the display settings;
2, determine whether your display is a partial display problem or the entire screen display has a problem;
Partial display is not normal to eliminate communication problems. Generally it can be determined that the display hardware is faulty. You should contact us immediately to prevent the fault from expanding.
There are several reasons why an entire screen display may not be normal:
For synchronous display,
You should confirm if the settings on your monitor change
Whether the communication is normal, whether the sending is normal, and then whether the receiving is normal or not;
For an asynchronous display, first of all the parameters of the display should be confirmed: hardware address, width, height,
If there is any change in the IP, if these parameters are correct, then test whether the communication is normal, and finally determine whether the display control is normal. The display screen of the cell panel is composed of a display unit board, and the signal is transmitted through the flat cable. Cell board interface: Description: N = ground (GND) L = latch (LAT or ST) S = clock (Clk) O = enable (OE) E = enable (/OE)
R=red data G=green data U=blue data ABCD=line signal H=decoded line signal F=floating V=VCC) Modification To save the customer's investment, we can provide customers with existing LED display screens. Renovation, updates and other services. According to the customer's display can be roughly divided into the following three categories: 1. The same display unit board interface Many manufacturers display the unit board interface is not standard, if the customer display unit board interface is the same as the interface mentioned above, we can carry out system upgrades, such as text screen, low grayscale video screen, high grayscale video screen, This method is low-cost and quick. 2. Display Unit Board Interface If the customer display unit board interface is not exactly the same as the standard interface arrangement listed above, but the number and type of signals are the same, the display screen can also be upgraded, and the cost is slightly higher than in the first case. 3. The completely different display unit board interface The customer's original display unit board interface is not exactly the same as the above, in this case the cost of reconstruction is greater. In addition to the LED module and part of the IC reservation, other parts such as the PCB board, Si system, etc., all have to be replaced, the cost is higher.
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