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BULLETIN NUMBER:
APPLICABLE MODEL: FT6645/6655
SUBJECT: VERTICAL BLACK LINE
SYMPTOM:
Vertical black lines on non-operator side of copies (see illustration [E]).
CAUSE:
The cleaning blade side seals are deformed during or prior to installation. If there is a gap between the
cleaning blade [A] and the side seals [B], air flows from the front side [C] to the back side [D] of the cleaning
blade through the gap. This air carries a small amount of toner to the back side of the cleaning blade where
it gradually accumulates. This accumulated toner drops to the drum creating black lines [E].
Correct Condition
[A]
SOLUTION:
1. Clean the back side of the cleaning blade.
2. Apply setting powder or toner to the side seals where they touch the cleaning blade.
3. Install the cleaning blade.
4. Confirm that the cleaning blade is not deformed.
[B]
Drum
Drum
6645/6655-009
Incorrect Condition
Drum
[C]
[D]
(paper travel)
Drum
04/15/94
[E]
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