Konica Minolta 7020 Service Manual page 126

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DRUM UNIT
a. Removing procedure
(1) Remove the drum unit from the main body.
(2) Set the unit so the drum is to the top.
(3) Remove the cleaning rod's shaft stopper fitting,
and pull out the cleaning rod.
2
(4) Disconnect the connector from the drum unit.
(5) Remove the two set screws, then disengage the rear
of the charging corona unit in the direction of a, and
remove the charging corona unit in the direction of b.
2
Charging corona unit
Connector
(6) Remove the stopper ring, and pull out the drum
shaft.
Stopper ring
(7) Remove the 2 set screws holding the drum bearing
in place, and remove the bearing.
Stopper
fitting
Set screw
Clearning rod
Drum shaft
(8) Remove the 2 semicircular seal blocks (one on
each end of the drum).
(9) To remove the drum, push it back toward the rear
and lift it up and out from the front.
2 Scerw that must
*
not be removed
Seal blocks
b. Installing procedure
Caution: Be sure that the toner collection sheet
makes contact with the entire span of the
drum, with no gaps.
(1) Coat the entire surface of the drum with setting
powder.
(2) Fit the convex end of the drum into the rear side of
the unit, then set the drum down into the unit.
Reattach the two seal blocks (one at each end of
the drum).
2
Seal block 1 (front)
(3) Reattach the drum bearing. Fasten it into place with
the 2 set screws.
(4) Insert the drum shaft and reattach the stopper.
3-E-2
Drum bearing
Seal block 2 (rear)
Drum