故障现象:打印头用久后会产生下列现象:有一根或几根打印针打印时色淡或无色(这种情况有三种亘能:一是由于有污垢将打印针出口孔堵塞后,使打印机的复、位弹簧失灵或电磁铁不能将打印针顶出;二是在打印过程中打印头不断地左右移动,而色带仅是朝着一个方向移动,由于其一的原因,使得打印针不能及时回缩,而导致打印针头折断;三是打印针用久后会磨损,以致针体不够长。后两种情况应换新的打印针); Symptoms: Print head with a long time will have the following phenomena: There are one or a few print pins when printing pale or colorless (in this case, there are three Gengrang: First, due to the dirt will be printed pin outlet hole blocked, so that Printer complex, bit spring failure or electromagnet can not be printed pin; Second, the print head in the printing process continuously moving around, and the ribbon is only moving in one direction, due to one of the reasons that makes the print pin Can not be timely retraction, resulting in broken print pins; Third, the print pin will wear with a long time, resulting in needle length is not long enough. The latter two cases should be replaced by a new print pin);