2780清零软件
【首要确保打印机进入修理模式】1.关闭打印机电源。2.按住进纸键（电源下面那个按键）不松开，然后开电源（按住电源键不松开）。3.然后松开进纸键，接连按5下进纸键，然后松开电源键。4.机器开始运行，等候电源灯中止闪烁，电源灯变绿。( 1. Turn off the printer power. 2. Press and hold the paper feed key (the key below the power supply), and then turn on the power supply (press and hold the power supply key). 3. Then release the paper feed key, press the paper feed key five times in succession, and release the power key. 4. When the machine starts to run, wait until the power light stops flashing and the power light turns green.)
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