FUJITSU fi-434PR - Manual (Page 17)

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With increased use of the imprinter, dirt such as ink sticks to the imprinter base, causing dirt on the paper.
As part of daily maintenance, clean the imprinter base by following the procedure below:
When cleaning, gently wipe off dust on the imprinter base, especially the dotted area below, with an absorbent item
that can remove the ink.
If the ink hardens, gently wipe with a moistened cloth. (Since the ink is water-soluble, it can be cleaned with water.)
(5) Cleaning the Imprinter Base
Clean the imprinter base as follows:
Lift the imprinter.
Clean the imprinter base.
1
2
Clean the base especially
focusing on the dotted area.
NOTE
Enlarged figure