Service and Maintenance 6
TANGO / TANGO XL – Operation 6–5
0 Cleaning the Optics
To clean the scanning lens, you should first
remove the drum as described in the
section on changing the drum.
Only clean the optics when the they are
actually dirty. Owing to the special surface
sealing of the lens, frequent wiping of the
lens with dry cloth may cause damage.
To determine the extent of the dirt, use a
flashlight.
Cleaning may be necessary when a
scattered light effect becomes visible or
even measurable on the edges of the
original (perforation).
The lens can be cleaned with a clean cotton
bud – Use each cotton bud only once!
■ Dust and lint can be removed with com-
pressed air (rubber blower), a soft optics
brush, or a clean dry cotton bud.
■ Oil and gel can be removed with a cotton
bud which has been slightly moistened in
spectroscopically pure acetone.
As acetone solubilizes plastics and color
paints, it should not come into contact with
either of these materials and should be
used very selectively. For this reason, the
cotton buds must have a wooden stem, as
plastic stems may be solubilized by the
acetone and can soil the optics, causing
irreparable damage.
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