Canon iR C6800 Series Service Manual page 854

Chapter 12
<Cleaning Procedure>
1) Place the ITB cleaner drive unit [1] with its cover
facing down; then, stand the ITB unit [2].
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[2]
[1]
2) Clean the rollers [1] and the inside scraper [2] using
alcohol.
[1]
[1] [2] [1]
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