Olivetti d-COLOR MF654 Quick Manual page 193

5.2 When printing quality has deteriorated
4
Slowly insert the Printhead Cleaner all the way to the back
end of the Print Head Glass section, and then slowly pull it
out.
% Repeat this operation approximately three times for all of
the Print Head Glass sections.
5
Mount the Printhead Cleaner onto the Lower Front Door or Front Door of this machine.
6
Install the Waste Toner Box.
7
Close the Lower Front Door or Front Door of the machine.
d-COLOR MF654/MF554/MF454/MF364/MF304/MF254
5
5-7