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Diagnosis Of Common Troubleshooting LED Display

Diagnosis Of Common Troubleshooting LED Display

Jan 17, 2017

On the screen is not lit situations and solutions
With the prolonged use of LED electronic display, malfunctions may occur, if LED electronic display screen brightness problems arise, can check out:
ⅰ. the entire screen is not lit (black screen)
1. test power supply is receiving power.
2. testing communication cable is connected, there is no mistake. (Synchronous screen)
3. synchronous screen test sending and receiving communications the green light without blinking.
4. computer monitor is protected, or display areas are black or blue. (Synchronous screen)
ⅱ. the whole unit does not light (black screen)
1. continuous pieces of cross direction does not light, normal and abnormal cell plate is connected to the cable connection between; or if chip 245 is normal.
2. the longitudinal direction a few boards do not light up, check whether the power supply is normal.
III. Board up does not light
1. check the feet and 4953 output pin are connected.
2. check if 138 is normal.
3. check if 4953 is hot or burning.
4. check if 4953 has high level.
5. check if 138 feet are connected with 4953 control.
IV. module does not light
1. check if 595 is normal.
2. check whether the module corresponds to pass up and down the foot through.
3. check if 595 output pin to the module pin are connected.
ⅴ. module missing colors
1. check if 245 R.G data is output.
2. check the normal 595 output pin and abnormal 595 input pin are connected
Other than the screen does not light, the following are LED electronic display problems that may arise, and solutions
01. the load may not be what cause?
Loads may not be caused by the following reasons, follow the listed compared with your actions:
A. ensure that the control system is on the right. (+5V)
B. check to make sure controller serial line for connection to the straight line, instead of crossing lines.
C. check and verify that the serial cable is intact and not loose or have fallen off at both ends.
D. Control LED display control software and own the control card to select correct model and correct transmission mode, the correct string of slogans, the correct baud rate and control software provided within the dial switch set correctly on the control system hardware address and baud rate.
E. see if the jumper CAP is loose or have fallen off; if the jumper CAP is not loosening, make sure that the jumper CAP is the right direction. F. If, after the above checks and load not remains after correction, please check with a multimeter, connected to serial port of the computer or control system hardware is damaged. to confirm whether it should be returned to the computer manufacturers or hardware back testing of control systems.
02. a communication may not be the cause?
Communications and loading up on similar, could be caused due to several reasons, follow the listed compared with your actions:
A. ensure that the control system is on the right. (+5V)
B. check to make sure controller serial line for connection to the straight line, instead of crossing lines.
C. check and verify that the serial cable is intact and not loose or have fallen off at both ends.
D. Control LED display control software and own the control card to select correct model and correct transmission mode, the correct string of slogans, the correct baud rate and control software provided within the dial switch set correctly on the control system hardware address and baud rate.
E. see if the jumper CAP is loose or have fallen off; if the jumper CAP is not loosening, make sure that the jumper CAP is the right direction. F. If, after the above checks and load not remains after correction, please check with a multimeter, connected to serial port of the computer or control system hardware is damaged. to confirm whether it should be returned to the computer manufacturers or hardware back testing of control systems.
03. Why are prompted to "please connect the LED display controller"?
Many customers from the company's Web site on the "Download Center" direct download "LED display control system", after running for 20 minutes after the installation appears "connecting LED display controller" tips for Word, this is due to the system being tested is not detected within the time approached the scope of control system hardware reasons.
At this time, please buy the LED display control system hardware at one end connected with the computer and the other end connected with the HUB module, HUB module cable plug is connected with the LED display of each cell part of the interface.
After you connect, you can enter the "settings" in the "settings screen" set parameters, close and reopen the software upon completion, and appears above the software "connection succeeded." at this point, the system has detected a display control system hardware, will be without time limit in normal use.
04. why hardware in the LED display control system just appears for a few seconds when power on light line "or" video corruption "?
Will display controller and computer and the HUB distribution Board and display connection properly Hou, need to controller provides +5V power to makes its normal work (at, do not directly and 220V voltage phase connection). Shang electric moments, display Shang will appeared several seconds of bright line or "spent screen", the bright line or "spent screen" are is normal test of phenomenon, reminded user display is began normal work.
Within 2 seconds, the automatic elimination of the phenomenon, display in normal working conditions.
05. automatic or manual brightness adjustment is what does that mean?
Brightness refers to the display screen is able to display the faintest the adjustments that you made with the brightest. rather than photographic adjustment.
Automatic brightness adjustment based on different time periods different brightness should be approached by wide LED display control system automatically adjusts the brightness to a predetermined.
Manual brightness adjustment refers to the end user through the go wide LED display LED display control system operation reaches a specified brightness.
06. why the controller everything was normal display not shown on it?
Controller and connector in case properly, sometimes also appears on the LED display screen does not appear, is generally caused by one of the following, please check:
A.LED on the display is normal.
B.HUB module-display line is reversed.
C. and sends the program being edited is empty.
07. the unit the whole screen not bright or dark light.
A. Visual power connector, ranges between 26P cable and the power supply module led is normal.
B. measuring unit with or without the normal voltage with a multimeter, then measure the power supply module output voltage is normal, if not, were judged as bad power supply module.
C. measurement of low power supply voltage, adjust the trimmer (power module trim near the led) the voltage up to standard.
08. LED display a black screen is the cause?
In control system using of process in the, we occasionally also will encountered LED display appeared black screen of phenomenon. also of a phenomenon may is by various different of reasons led to of, on even display variable black of process also will for different operation or for different environment and different. like it may is a Shang electric of moments is black of, also may in loaded process in the variable black, also may is in sent finished Hou variable black and so on. encountered this phenomenon Please note can reference following all aspects to judge "fault":
A., including control systems, make sure that all of the hardware is on the right. (+5V, not reversed, and a wrong)
B. checks and repeatedly recognized for controller serial cable is loose or fall off. (If you are black in the loading process, probably because it is the cause, that is interrupted by a communications cable is loose in the communication process, hence the black screen. never think that the display did not move, the line cannot be loosened, please do check, which is important to you want to solve the problem quickly.)
C. check and confirm that the connected LED display and main HUB module connected to the control card is connected.