Gp 2 Image On Drum (Panic Stop) Procedure - Xerox 8850 Service Manual

GP 2 Image on Drum (Panic Stop) Procedure

This procedure allows the isolation of print quality problems by observing the image on the
Drum before the transfer of the toner to the media. If the defect is visible on the Drum before
the transfer, the defect is related to the charge, the imaging, or the developer. If the defect is
visible on the print after the transfer, the defect is related to the transfer or fuser.
1. Open the Front Door and install an Interlock Cheater Tool in the interlock
2. Locate the Drum Drive Coupling between the Drum Drive Motor and the Drum (Figure 1).
Figure 1 shows the Xerographic Module raised in order to see the location of the Drum
Drive Coupling. The Xerographic Module needs to be in the operating position for this
procedure.
8850/ 510DP
Drum Drive
Coupling
NOTE: In the next step, you will need to stop the Drum by hand in order to prevent the
Drum from moving (coasting) by the Developer Module and putting s reverse image on
the Drum. The Drum Drive Motor is a low torque motor and will stop easily. Place your
hand lightly on the Drum Drive Coupling in preparation to stop the Drum then open the
interlock.
3. Make a test print. Open the right door interlock and immediately grip the Drive Coupling to
stop the Drum when the test pattern is almost half way beyond the Drum (Print is just
starting to exit from the Printer).
4. Remove the Developer Module.
5. If the defect is visible on the developed image, the defect cause is related to the charge,
the imaging or the developer. If the defect is not visible, the defect cause is related to the
transfer or the fuser.
03/2003
6-11
General Procedures
GP 2