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5. Routine maintenances
Caution：
1.
Before starting routine maintenance for the printer, make sure the power is turned off.
2.
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.
3.
Do not use organic solvent like gasoline, acetone and etc.
4.
When cleaning print head or sensors, please wait for pure alcohol to evaporate totally before
starting printing
5.
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：
1)
Printout is not clear.
2)
Some columns on the page are not clear.
3)
Paper feeds or retracts with big noises.
To clean the print head, follow steps given below.
1)
Turn off the power and open the upper cover.
2)
Lift print head module and wait for print head to cool down totally when it has just finished printing;
3)
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.
4)
Wait for 5 to 10 minutes until pure alcohol evaporates totally, press down the print head module and
close upper cover.
5.2 Cleaning sensors
5.2.1 Cleaning paper sensor
When any of following cases occurs, the sensors should be cleaned.
1)
During printing, the printer sometimes stops printing and alarms paper end when there is paper in
fact.
2)
The printer doesn't alarm paper end when paper is out
3)
The printer doesn't identify marks correctly
To clean paper sensor, follow the steps given below:
1)
Turn off the power, open upper cover.
2)
Lift the print head and find out paper sensor according to the printer figure 3.4.1 Printing part
Sensor.
3)
With soft cotton cloth dipped with pure alcohol (should be wrung), carefully wipe off stains on the
surfaces of sensors.
4)
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 load sensor
When any of the following case occurs, paper load sensor should be cleaned.
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User Manual
BK-S216
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