Cleaning The Print Head - Epson TM-L90 Manual Del Usuario

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Troubleshooting
ERROR light on or blinking
Check to see that the paper roll cover is closed and check the
PAPER OUT light. Close the cover or replace the paper if necessary.
If the printer has been printing a lot, the head may be hot. Wait for
the head to cool. Printing will resume automatically.
If the autocutter is jammed, turn the printer off and then back on.
If the paper roll cover will not open, see the section below.
Turn off the printer and then turn it back on. If the light is still
blinking, call your supervisor or a service person.
Paper jam
Turn off the power and open the paper roll cover and check for a paper
jam. If there is a paper jam, remove the jammed paper and follow the
instructions in the Installing the Paper Roll section to prepare the
printer for printing.
The paper roll cover will not open
Turn on the printer and remove the cutter
cover. To remove the cover, use a tool
such as a screwdriver, and insert it into
one of the slots indicated by a circle in the
illustration and push the cover upward.
After removing the cutter cover, use a
ballpoint pen or tweezers to turn the knob
in the direction indicated by the arrow
until you see a triangle in the opening.

Cleaning the Print Head

After printing, the print head can be very hot. Be careful not to touch it
and to let it cool before you clean it. Do not damage the print head by
touching it with your fingers or any hard object.
Turn off the printer, open the paper roll cover, and clean the thermal
element of the print head with a cotton swab moistened with an
alcohol solvent (ethanol, methanol, or IPA). See the next illustration.
EPSON recommends cleaning of the thermal head periodically
(generally every three months) to maintain receipt print quality.
6 TM-L90 User's Manual
CAUTION: