3070打印机长期使用后,经常出现打印字迹模糊的现象,有时甚至看不见打印字迹。这种故障多数是由于打印机长期使用后打印针磨损所致(不包括断针)。用户如果重新更换打印针或打印头,又很不经济。这里介绍二种简单实用的方法。方法一:卸松打印头固定螺钉,用适量的力推动打印头靠近滚筒,然后拧紧打印针固定螺 3070 printer long-term use, often appear blurred printing handwriting, and sometimes can not even see the printing handwriting. Most of this failure is due to long-term use of the printer after the print pin wear (excluding needle). It is not economical for the user to replace the print pin or print head again. Here are two simple and practical ways. Method one: uninstall the print head fixing screws, with the right amount of force to promote the print head close to the drum, and then tighten the print pin fixing screw