Shenzhen LED display repair technical problems and solutions

Those who have installed LED electronic display, I believe that they will encounter some technical problems more or less, do not understand, do not know to go there to learn! In fact, sometimes some problems are very simple, but often they can't find the key points, so they don't delay the time and don't say it, but also affect their business benefits! Here are some common technical problems and methods for LED display repair!

First, the problem: the whole unit board is not bright, it is the legendary (black screen)!

Solution: If the horizontal direction of several consecutive boards is not bright, check whether the cable connection between the normal unit board and the abnormal unit board is connected! Or is the chip 245 normal? However, if the longitudinal direction of several boards is not bright, then check whether the power supply of this column is normal.

Second, the problem: the whole screen is not bright (all black screen)

1. Check if the power supply is powered.

2. Check if the communication line is connected, and if there is any error. (synchronous screen)

3. Synchronous screen detects whether the green light of the sending card and the receiving card communicate with or without flashing.

4. Whether the computer monitor is protected, or the display area is black or pure blue. (synchronous screen)

Third, the unit board does not shine

1. Check if the foot is connected to the output of the 4953.

2. Check if 138 is normal.

3. Check if the 4953 is hot or burnt.

4. Check if the 4953 has a high level.

5. Check if the control feet of 138 and 4953 are connected.

Fourth, the unit board is not bright

1. Check if 595 is normal.

2. Check whether the corresponding pin of the upper and lower modules is connected.

3. Check if the 595 output pin is connected to the module pin.

Fifth, the unit board is lacking color

1. Check if the 245 R.G data has output.

2. Check if the normal 595 output pin is connected to the abnormal 595 input pin.

Six, dot matrix digital hybrid LED display failure:

1. The whole screen of the LED display is shaking and flickering. The reason is that the card inside the machine is not normal and the card is replaced.

(2) The brightness of the digital part is wrong. The T-type potentiometer is adjusted or damaged to be re-adjusted and the T-type card is replaced.

(3) The stock of a certain bank is abnormally bright, and the short circuit should be excluded.

(4) LED does not shine, there is virtual solder or LED is broken, repair welding, replace LED.

(5) The market display position is wrong, the T-card address jumps incorrectly, and the adjustment is updated.

Shenzhen Caixingxing Photoelectric Co., Ltd. is a comprehensive high-tech enterprise specializing in the production, operation and installation of indoor and outdoor LED electronic display, LED electronic large screen, LED door display, lighting (energy saving lamp) and landscape lighting project! The company has strong strength in LED display repair in Shenzhen. It has a professional LED display maintenance team, which can solve all kinds of LED display problems and provide perfect solutions. It is convenient and fast. As long as you have a phone call, we can also provide on-site service! !