A: Transparent light to check whether the carbon belt has regular leakage of coating;

Check whether the printer roller has broken points and pits, and if there is a need to replace it (this rubber roller cannot be repaired);

Change a roll of labels to see if it is better;

Anomaly Analysis:

The ribbon itself has regular leakage coating;

The printer roller is regionally damaged;

The surface of the label is regularly oily and overflowing;

Troubleshooting, Solutions:

Transparent light to check whether the carbon belt has regular leakage of coating;

Check whether the printer roller has broken points and pits, and if there is a need to replace it (this rubber roller cannot be repaired);

Change a roll of labels to see if it is better;