Ricoh A172 Service Manual page 101

19. Turn the drum unit over.
NOTE: Let the unit rest on it's casing.
20. Remove the drum protective sheet [A].
21. Loosen then move the knob [B]. (Move the knob from [C] to [D].)
•
[C] position = No pressure applied
•
[D] position = Pressure being applied
22. Tighten the knob [B] at the lower position [D].
23. While pressing up the latch [E] to apply the cleaning blade pressure,
rotate the drum counterclockwise 3 times to ensure that setting powder is
evenly applied, as shown.
NOTE: Hold only the edge of the drum to rotate it (within 1 cm from the
end).
A172/A199
[A]
[B]
[C]
[D]
3-12
[E]
SM