Shaanxi LED display LED electronic display preferred Shaanxi Hi-Tech Optoelectronic

Shaanxi LED display 1 3 9 9 2 8 8 9 9 6 3 LED electronic display preferred Shaanxi Hi-Tech Optoelectronic entire screen is not bright (black) 1, the detection power is power. 2, testing the communication cable is plugged in, with or without wrong. (Synchronous screen) 3, synchronous screen detection sending card and receiving card communication whether the flashing green light. 4, the computer monitor is protected or display area is black or pure blue. (Synchronous screen) block cell board is not bright (black) 1, a few consecutive plate transverse direction is not light, check the cable normal and abnormal cell plate cell plate connection is turned on; or whether chip 245 is normal. 2, a few boards continuous longitudinal direction is not light, check the power supply is normal in this column. Unit-panel does not shine 1, check whether the line output or 127 feet and 4953 feet through. 2, check 138 is normal. 3, 4953, or 127 check whether hot or burned. 4, 4953, or 127 check whether there is a high level. 5, check whether 138 4953 or 127 feet through control. 1 cell board does not shine, check 595 is normal. 2, check the upper and lower module corresponding through foot is turned on. 3, check whether the module output pin 595 feet through. Lack of color unit board 1, check whether there is output data 245 RG 2, check the normal and abnormal output pin 595 595 input pin on. LED light module faults and solutions a phenomenon: all the LED flashes; the problem: bad; Workaround: loose at reseat or patch; Second, the phenomenon: LED dim; issue: 1, LED polarity reversed; 2, LED long; 3, inconsistent, switching power supplies and LED voltage reference; Solution: 1, to ensure that the positive and negative wiring is correct; 2, to reduce LED connection; 3, switching power supply and LED voltage to ensure consistency label; Third, the phenomenon : part of the line of LED light does not shine; issue: 1, plug direction is correct; 2, power output wiring is correct; 3, the power cord is plugged in reverse,; Solution: 1, split out, plug in the right direction again ; 2, make sure the red wire to positive, black wire to negative; 3, isolated part of the insert opposite line, reconnect; four, phenomenon: all LED are off; the problem: 1, no voltage output switching power supply; 2, switch Power output wiring is correct; Solution: 1, test access switch electrical power input; 2, power wiring positive and negative is correct; (From the LED display maintenance network)