Samsung SRP-350PG - SRP 350 B/W Direct Thermal Printer Service Manual page 45

5 Maintenance and Adjustments
5-2 Maintenance
5-2-1 Cleaning Head
Paper dust on the heating elements may lower the print quality. In this case, clean the print head as follows:
Caution : Turn off the printer power before cleaning.
Caution : Note that the thermal head (Thermal Element and Radiation Plate) becomes very hot during
normal operation, creating the danger of burn injury. Bu sure to wait for about 10 minutes
after turning printer power off before beginning the cleaning.
1. Open the cover-open.
2. Clean the thermal element (the area that looks like it is marked a thin black line) of the thermal head with a cotton
swab moistened with an alcohol solvent (ethanol, methanol, or IPA).
3. After confirming that the alcohol solvent has been dried up completely, close the cover-open.
Spring pin
Note : Never touch the thermal element with your hand. Doing so can damage the thermal element.
Note : Do not scratch the Printer Head.
5-4
Radiation plate Head tip
Print circuit board
Connector
Figure5-4 Cleaning the Printer Head
Heat sensitive
layer
Base
Protective
layer
Electrode
Resistor
Board
Samsung Electro-Mechanics