Olivetti d-COPIA4513MF plus Operation Manual page 391

Troubleshooting > Regular Maintenance
Slit Glass
When using the document processor, clean the slit glass surface and the reading guide with the dry cloth.
IMPORTANT
Do not use water, soap or solvents for cleaning.
NOTE
Dirt on the slit glass or the reading guide may cause black streaks to appear in the output.
d-COPIA 5514MF/d-COPIA 6014MF only
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