before or after disconnecting the signal level , there may be damage to the module IC and circuit , should drive power, the logic of power , it helps to maintain a good display screen and avoid the power off when the voltage of impact damage. It is recommended to use as a drive with controlled power supply module .low temperature lcd module will not allow the outer lead wrong, when you want to debug lcm module module , please note the correct wiring, especially the positive and negative power supply wiring can not be wrong, or they may cause overcurrent, overvoltage, burned on the circuit chips and other components for LCD module appear damaged .
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