First, do not load or no communication on the reasons for that?

Communication is not loaded with no more or less the same reasons, may be due to several reasons, according to the listed and control operations:

1, to ensure that the control system hardware has the right power-on. (+5 V)
2, check to make sure the controller's serial port to connect straight line for line, and not cross lines.
3, check to make sure the serial port to connect both ends of the line intact and not loose or fell off the phenomenon.
4, the control LED screen and control their own software to control the selection of cards to choose the right type of product, transfer the right way, the correct serial number, the correct serial transmission speed and control software to provide dial the code switch plans to set up the right to control System hardware on the address and serial-bit transfer rate.
5, to see whether the jumper cap off or loose; If the jumper cap is not loose, make sure the jumper cap on the right track.
6, such as after a more than Correction and inspection after loading does not appear, please use measurement multimeter if this is connected to the computer control system or hardware serial damaged to determine whether to return or computer manufacturers to control system The return of hardware detection.

Second, LED screen on power just a few seconds when the line-screen or the screen changes to spend the reason?

The controller and a computer screen and the distribution of HUB plate and the screen to connect properly, the need to provide +5 V power supply controller in order to make it work (at this time, not directly connected with the voltage 220V). Instant power-up, will appear on the screen a few seconds or a bright line "Hua Ping", the bright line or "Hua Ping" tests are normal, to remind the user of the screen is about to begin work. 2 seconds, the automatic elimination of the phenomenon of the screen to enter the normal working condition.

Third, manually or automatically adjust the brightness What does this mean?

Adjust the brightness of the screen is the best show of the most dark and the brightest among the adjustments made, and not sensitive regulation. Automatic brightness adjustment is based on a different time period appears to be different from the brightness and go wide LED screen control system to automatically adjust the brightness of a target. Manually adjust the brightness is the end-user through the LED screen on the control of the operating system so that it reaches a certain designated LED screen brightness.

Fourth, the whole film unit arise panel screen is not bright, dark -

1, visual power cable, cell plate 26P cable between the power module and light are in working order.
2, multimeter measurement unit board whether or not the normal voltage, and then measuring the output voltage power supply modules are in working order, and if not, what is judged as a bad power supply module.
3, measuring low-voltage power supply modules, fine-tuning adjustment (power module close to the Office of the fine-tuning light) so that the voltage is up to standard.

Five, LED screen and full-screen emergence of the reasons for that?

In the application of control systems, we occasionally encounter LED screen and full-screen appears. The same phenomenon may be caused by a variety of reasons, even the black screen of the process will be different as a result of the operation or because of different circumstances vary. For example, it may be a power-on moment is black, may also be included in the process of black, but also may be sent in after dark, and so on:

1, including the control system to ensure that all hardware has been on the right of all electricity. (+5 V, not to take anti-, followed by mistake)
2, and check again to confirm connecting the controller to the serial line if there is loose or fell off. (If included in the process of black, it may be due to the reasons, that is, in the process of communication due to the interruption of communication lines and the loose, black screen, therefore, should not think that no-screen action, the line can not be relaxed, Hands-on look, which wants to quickly solve the problem is very important.)
3, check to make sure LED screen and connect with the main control card connected to the distribution of the HUB's board whether or not closely connected, whether or not the anti-inserted.