Xerox ColorQube 9303 Series Service Manual page 1706

Stripper Assembly
The stripper assembly is actuated and placed against the drum just prior to paper arrival. The
stripper assembly is necessary to break the bond of the media with the drum surface. Once the
edge is lifted the stripper blade is retracted until the next lead edge is almost to the stripper.
The stripper blade is grounded via the conductive plastic in the assembly. This provides the
path back to the metal paper path plate and back to the ground of the electrical connector on
the stripper latch assembly. Failure of this ground may lead to ESD hits to the communications
lines. Figure 18.
Figure 18 Stripper assembly location
The M4 drive motor is run in reverse to lock and unlock the stripper assembly. M4 also pro-
vides drive to the 'J' and 'L' paper path nips (part of the stripper assembly). Unlatching can also
be achieved via a screw at the front of the motor block. Placing the screw slot at approximately
the horizontal position will unlock the stripper assembly. During normal machine operation the
mechanism will automatically move to the unlocked position when a jam occurs.
The stripper cam home sensor sits behind the front stripper cam latch arm. This is an optical
sensor which is blocked by a flag when in the stripper operation position. However, the stripper
assembly can be unlatched and still have the arm in the home position. Since the stripper han-
dle must be in the operational position before the front door is closed, this is not considered an
issue by the PDT but means that the operator cannot be informed they have failed to close the
stripper assembly.
Principles of Operation
During normal operation, the stripper assembly is locked in position. When the front door is
opened while a jam is present in the stripper area, the stripper cam arm should move to the
home position which allows the stripper assembly to be unlatched. There is a concern that this
may confuse customers and this latch may be broken. Should the stripper fail to home and
unlatch, there is a screw slot accessible through the front motor block frame (to the right and
below the transfix flexure encoder) which will allow the technician to manually turn the M4
motor to home the cams.
The stripper blade is coated with Teflon to reduce the build up of ink. However, debris on the
stripper blade can contribute to damage on the lead edge of the media. Additionally the con-
tamination on the blade may come off the blade when it is brought off contact with the drum
and comes up, striking the media approximately 15 mm from the leading edge. The stripper
blade mechanism is ordinarily locked and does not release until the front door is opened. This
is necessary due to the mass of the stripper transport and blade assembly. If it is necessary to
unlock the stripper assembly with power off, a screw slot within the front drum plates that
allows the drives to be turned to an unlocked position (screw slot will be approximately horizon-
tal). The stripper blade is manufactured with a blunt point to greatly reduce the possibility of
personal injury while handling the stripper blade by service personnel for the purposes of
removal and installation. Care should still be taken when handling the unsaddled stripper blade
assembly.
Exit Module
Figure 19.
February 2013
8-12
Figure 19 Exit module location
ColorQube® 9303 Family