User manual

Xiamen Rongta Technology Co., Ltd.
www.rongtatech.com 14
Procedure of maintaining the print head is listed below:
（1）Turn off the power supply and open the top cover. Remove the paper if
necessary.
（2）Please wait for the cooling of print head if it just finish printing.
（3）Use the cotton cloth and dip it in the absolute ethyl alcohol to clean the
surface of print head.
（4）When the absolute ethyl alcohol is completely volatilized, please close the
top cover and restart the printer.
10.2 Sensor Maintenance
When the printer has following circumstance should clean the paperless sensor:
（1）During the printing, the printer occasionally stop print and the paperless
alarm is beeping.
（2）No paperless alarm.
Procedure of maintaining the sensor is listed below：
（1）Turn off the power supply and open the top cover. Remove the paper if
necessary.
（2）Use the cotton cloth and dip it in the absolute ethyl alcohol to clean the
surface of sensor.
（3）When the absolute ethyl alcohol is completely volatilized, please close the
top cover and restart the printer.
10.3 Print Roll Maintenance
When the printer has following circumstance should clean the print roll:
（1）Printing is not clear;
（2）Some longitudinal columns on the printing page is vague;
（3）Loud noise when feeding.
Procedure of maintaining the print roll is listed below:
（1）Turn off the power supply and open the top cover.