Full color LED display control card - common problem LED display - knowledge

The normal work of how to determine whether control card? Answer: after turning on the power supply control card, please observe the power indicator light, red light says 5 v voltage is connected to, if not bright, please immediately shut off the 5 v power supply. Check if 5 v working voltage is connected and the overvoltage, reverse connect, failure, output short circuit, etc. Please use a separate power supply 5 v power supply for the control card. If the red light is not bright, need to repair. Under normal operation of control card, why screen no display or abnormal brightness? A: control card connected to the display driver after electrify, 16 scan by default, if no display, please check the data in the control software polarity and OE set is correct; If there is a brightness is unusual, particularly bright, said OE set backwards, please OE set correctly. Why information after loading, the screen can't display properly? A: check 'control card set of scanning output of choice is correct. When using control card, to alert users is important to note the following: 1, it is strictly prohibited to charged plug a serial port, so as to avoid damage due to improper operation computer serial port and serial port control card. 2, it is strictly prohibited in the system charged adjust control card input voltage at work, in order to avoid damage due to improper adjustment, high voltage computer serial port and serial port control card. Normal working voltage is 5 v control card. Adjust the power supply voltage, should have the control card to be removed, the slow adjustment is measured with a multimeter. 3, it is forbidden to the earthing end of the control card and sub screen frame, otherwise once assembled electrostatic on screen frame, easy to damage the computer serial port and serial port control card, destabilize communications, electrostatic serious when burning control card and the display unit on the screen. Therefore, in the outdoor screen or communication distance is far, suggested that the user must use a serial port isolator, in order to avoid the ground loop, surge, lightning, hot plug and other bad environment for computing machine damage to a serial port and the control card serial port. 4, must ensure the correct control card and computer serial port connection, in order to avoid damage due to incorrect input signal control card serial port and computer serial port. 5. Don't pick up on the unit board control card. Try to lead directly to the switch power supply, voltage in the process of work and its unit plate is not stable. Will cause the control card when fast slow, serious can't communication or program run fly need repair, especially usb control card, in the case of voltage instability may not read disk or disk error. 6. Control card please keep working in a dry, relatively stable environment, high temperature, and humidity, and dust environment, the control card.