①
The printer does not print clearly and the thermal paper is Ok.
②
The printer Print pages lengthways is not clear
③
It’s getting too noisy while feeding paper or printing.
Printer head cleaning steps are as follows:
1. Power off the printer and open the paper room cover. Remove the thermal paper roll.
2. If the printer just finished printing , please wait for the print head to cool down.
3. With a soft cotton cloth dipped in ethanol (please make sure there is no dripping), wipe
the thermal printer head gently and remove any dust or stains.
4. Wait for the complete evaporation of any ethanol, then place the thermal paper roll back
in the printer and close the paper room cover, then print a test page.
Notes
：
When the printer maintenance must ensure that the power is shut down
Hands or other metal tools away from the surface of the printer head,do not use
tweezers to scratch the surface of the printer head and other sensitive parts.
Do not use gasoline,acetone and other organic solvents for printer head cleaning.
9.General Troubleshooting
1: Why serial port printer printing messy code?
A: Ensure the baud rate setting in the PC is same as the printer baud rate. ( we can
see printer baud rate from self test page)
2: Self printing test is ok,but printer does not work after driver installation.
A: Recheck the installation according to above installation wizard and see if we
selected the right port or ask service center for advice if needed.
