When the characters printed on the printer are defective: The first reason is that the ink of the printer is not enough or the viscosity of the ink is abnormal. The second reason is that the ink recovery of the inkjet printer is not completely caused. It can be started from the inkjet printer pipeline to clean the ink path to ensure the ink path of the inkjet printer is smooth. In addition, the phenomenon that the ink of the printer is not recovered at all will also cause the character defect, which may be the reason why the printer is not used for a long time, or the circuit board of the printer is faulty, and the circuit board of the pump that controls the suction back is repaired. The third reason is the cause of the nozzle, and part of the nozzle of the nozzle is blocked. Printer grounding The printer is different from other equipment. The printer is deflected by high voltage static electricity, so the grounding must be kept good! Poor grounding, weak changes in static electricity may affect deflection, and accumulation of static electricity may cause poor dot separation, affecting the effect of coding, and problems such as scattered lattice and garbled characters. Accumulation of static electricity, if it is serious, it is very likely to cause sparks, and may even cause fire, so the grounding of the printer must be good. Sometimes the problem of grounding is solved, and some problems that are difficult to solve by the printer are also solved.