SATO SG112-ex Operator's Manual page 164

6 Maintenance
6
Clean the dirt on the print head  using
a cotton swab/cloth dabbed with cleaning
liquid.
7
Clean the dirt on the platen roller 
using a cotton swab/cloth dabbed with
cleaning liquid.
Rotate the roller to clean the entire roller.
8
Clean the dirt on the media sensor
window using a cotton swab/cloth
dabbed with cleaning liquid.
9
Lift up and remove the media lid  that
is covering the feed roller.
10
Dab the cleaning liquid on the cotton swab/
cloth, and wipe off the dirt from the feed
roller  and the upper nip roller .
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