LED display, the cause of chip burnout on the cell board
First, the LED display The chip on the cell board before the test
1, the circuit design appears positive and negative short circuit
2, the chip quality is not good
3. When the chip is soldered, the positive and negative poles are connected with other signals.
Second, the LED display panel chip after the test and the reason after the installation burned out
1. When wiring, do not pay attention to the reverse polarity.
2, the temperature of the chip is hot
3. There is no signal on the unit board so that the light on the unit board is always on.
4, sometimes the cable is reversed will also burn the chip
5, when installing, do not pay attention to the power can be dropped on the chip or on the positive and negative