BTP-L42II User’s Manual
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4 Routine maintenance
Clean the print head, platen roller and sensor every month
according to the following steps. If the printer works in a tough
environment, the maintenance times can be properly increased.
4.1 Cleaning print head
When any of the following cases occurs, the print head should be
cleaned:
Printout is not clear;
Feed or retract paper with big noise;
Something else sticks onto the print head.
Follow the steps below to clean the print head:
1) Turn off the printer and open the top cover;
2) Lift up the top cover and find the print head. Wait for print head to
cool down completely if it has just finished the printing;
3) Wipe off the dust and stains on the surface of the print head with
alcohol cotton ball (it should be wrung out);
4) Wait for 5 to 10 minutes until the alcohol evaporates completely,
press down the print head module, and close the top cover.
4.2 Cleaning the sensor
When any of the following cases occurs, the mark sensor should be
cleaned:
During printing, the printer sometimes misinforms paper end;
The printer does not alarm when paper end;
The printer cannot identify marks effectively.
