① Confirm whether the print head button on the light side is pressed tightly to eliminate artificial
(2) Clean the light part of the print head and roller, there may be dust and thick carbon accumulation, not completely removed;
(3) whether the film surface of the carbon strip is uniform, whether there is bad situation;
(4) The printing side is too light, the naked eye observation roller wear is serious, it is recommended to replace the new roller;
⑤ On the side of light printing, the print head is seriously worn by naked eye, so it is recommended to replace the print head;
⑥ The pressure on both sides of the print head is unbalanced, so it is necessary to increase the print head pressure on the light side of the printer;
Adjust the printer light side of the print head before and after position, adjust the print head and roller at the highest point of the horizontal plane;