TA Triumph-Adler 6555i - Manual (Page 439)

10-3
Troubleshooting > Regular Maintenance
Slit Glass/Dual scanning area
If black streaks or dirt appears in copies when using the document processor, clean the slit glass with the supplied
cleaning cloth. When using the document processor that features dual scanning, clean the dual scanning unit also.
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IMPORTANT
Wipe the slit glasses with the dry accessory cloth. Do not use water, soap or solvents for cleaning.