2 - K - 3
CLEANING/TONER RECYCLE UNIT
2. Removing and Re-installing the Guide Roller
Caution:
1. When installing the guide roller, it is necessary to set
the drum accurately in the center position. When the
drum used in this machine is removed, the drive shaft
remains in the main body, hence it is necessary to
center the drum using the two jigs inside the drum
cover.
Note: Before removing the drum, rotate cleaner idler gear B
counterclockwise in order to prevent toner from drop-
ping to the bottom of the unit, and also remove any
toner between the drum and the guide roller.
If the toner
cannot be removed, rotate the drum clockwise a bit,
then detach the drum while keeping the toner in place.
(3) Remove cleaner idler gear and the two springs.
Jig (large)
Jig (small)
Drum cover
2. When installing the drum, cleaning blade and guide
roller, coat the entire surface of the drum and also the
cleaning blade with setting powder, regardless of
whether the drum and cleaning blade are new or old
type parts. Also, apply toner to both edges of the
cleaning blade.
3. Once the drum has been coated with setting powder,
carry out the following work before installing the drum
unit on the main body.
1) To ensure that the toner density is correct, before
installing the drum to the drum unit, discharge the
surface of γ detection sensor and the Dmax sen-
sor on the control board by using a piece of cloth
moistened with alcohol, thus preventing toner
from adhering to the sensors.
2) After installing the drum to the drum unit, with the
charging corona unit and the developing unit
removed, insert the centering jigs into both sides
of the drum, then turn the drum one revolution.
This prevents setting powder from scattering onto
the charging corona unit and also prevents image
defects.
a. Procedure
(1) Remove the drum unit.
(2) Remove the charging corona unit, blade mounting
plate, developing unit and drum from the drum unit.
(4) Remove the left and right set screws (one each), then
remove the left and right shaft positioning pieces.
(5) Lift out the guide roller.
Set screw
Guide roller
Set screw
Shaft positioning piece
Shaft positioning piece
Springs
Cleaner idler gear
CLEANING/TONER RECYCLE UNIT-1
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