RICOH FT4421
Manual de Servicio

1 December 1990

4.7 ENTRANCE SEAL REPLACEMENT
[A] [B]

[C] [I]

[H]
2.5mm

[F] [G]

[D]
� �

[E]

1. Remove the cleaning unit and the following parts: Cleaning Blade Cleaning Brush 2. Remove the used toner. (See Used Toner Collection.) 3. Clean the cleaning unit with a vaccum cleaner.

4. Remove the entrance seal [A] together with the strip of 2-sided tape securing it to the lower casing. 5. Clean the lower casing [B] with alcohol; make sure that no tape remains on the casing surface. 6. Place a new strip of 2-sided tape [C] on the lower casing surface. The lower edge [D] of the tape must be flush with the edge [E] of the projection as shown in the illustration. 7. Place the new entrance seal on the 2-sided tape. Extend the seal so that both edges [F] align with the edges [G] of the tape. NOTE: a) The lower edge [H] of the entrance seal must be aligned with the edge [E] of the projection on the lower casing. b) Make sure that there are no waves in the upper edge [I] of the entrance seal.

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