Cleaning The Print Head Unit - Brother MFC4820C Service Manual

5.1.4 Cleaning the Print Head Unit

(1) Remove the print head unit from the carriage.
(2) Soak a Rubycel stick in "Glycerol cleaner."
(3) Clean the printing surface of the print head unit by rolling the Rubycel stick lightly on the
printing surface.
NOTE: Do not use a cotton swab that may leave lint on the cleaned sections. Lint left on the
purge unit will affect the print performance.
NOTE: Use a new Rubycel stick and do not use the used one for any other print heads.
NOTE: During the cleaning jobs, take care not to scratch the surface of the print head.
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