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BK-L216II Manual
5 Routine maintenances
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Caution
Before starting routine maintenance for the printer, make sure the power is turned off.
Do not touch the surface of print head with hands or metal. Do not use forceps so as to prevent print head, platen
roller and sensors being scratched.
Do not use organic solvent like gasoline, acetone etc.
When cleaning print head or sensors, please wait for pure alcohol to evaporate totally before starting printing.
It is recommended to do routine maintenance per month.
5.1 Cleaning print head
When the following cases occur, the print head should be cleaned:
Printout is not clear.
Some columns on the page are not clear.
Paper feeds or retracts with big noises.
To clean the print head, follow steps given below:
Turn off the power and open the upper cover.
Lift print head module and wait for print head to cool down totally when it has just finished printing.
Wipe off dust and stains on the surface of the print head with soft cotton cloth dipped with pure alcohol. The cotton
cloth shall be wrung before using.
Wait for 5 to 10 minutes until pure alcohol evaporates totally, press down print head module and close upper cover.
5.2 Cleaning sensors
5.2.1 Cleaning paper end sensor
When any of following cases occurs, the sensors should be cleaned:
During printing, the printer sometimes stops printing and alarms paper end when there is paper in fact.
The printer doesn't alarm paper end when paper is out.
The printer doesn't identify marks correctly.
To clean paper near end sensor, follow the steps given below:
Turn off the power, open print head upper cover.
Lift the print head and find out paper end sensor according to the figure 3.3.1.
With soft cotton cloth dipped with pure alcohol (should be wrung),, carefully wipe off stains on the surfaces of
sensors
Wait for 5 to 10 minutes until pure alcohol evaporates totally, press down the print head and close upper cover.
5.2.2 Cleaning paper loading sensor
When any of the following case occurs, paper loading sensor should be cleaned
The paper can't back to normal printing position during semi-automatic paper loading.
Print motor reverse backward for long time during semi-automatic paper loading.
After printing is finished, the paper can't return to normal printing position.
SNBC
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