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Preventive Maintenance Procedures
Cleaning Procedures
Print Head
ATTENTION!
The print head might be hot after printing. Let it cool down before cleaning it. The thermal
elements of the print head are fragile – do not touch them with any sharp objects or any
abrasive material.
During regular operation some particles from the thermal paper may adhere to the thermal
print head surface. It is recommended that the print head is cleaned every 10 km of printed
paper or if the print quality has degraded. Turn off the printer before cleaning it. Clean the
print head with a cotton swab soaked in isopropyl alcohol. Do not try to clean the print head
with sharp objects, abrasives or using your fingers as this may damage the head surface.
Platen roller
Clean the platen roller (rubber roller) with a cotton swab. Remove any dust particles from it.
Never use chemically treated moistened cloths or any kind of chemical substance. The use of
these products may cause the rubber in the roller to get dry, resulting in paper traction
problems.
Cutter
Clean the area near the cutter periodically. Use a soft bristle brush removing all paper dust
residues which can accumulate in the cutter mechanism, causing malfunction.
Sensors
Clean the MP-4000 TH sensors using a soft bristle brush. Remove all the dirt accumulated on
the lens.
Inner Case
Make sure the printer is off, open the cover and remove the paper roll. Use a flannel, a soft
cloth or a soft bristle brush and carefully remove all the dust accumulated.
External Surfaces
Clean the external cabinet with a soft cloth, moistened in water or neutral detergent. Never
use a tow chemically treated or chemical substances like alcohol or similar solvent. The use of
these products can make the cabinet of the printer changes its color or be deformed.
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