Canon imageRUNNER ADVANCE C2020, Service Handbook

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CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-8P
2 Image Formation System-Related Adjustments
2.1 Points to Note When Handling the Drum Unit
• When taking the drum unit out of the machine, be sure to hold it by its two grips; take
care not to impose force large enough to deform it.
• Take care not to force down the shutter surface at the center of the top of the unit; other-
wise, the shutter will warp to come into contact with the drum surface.
• Take care not to damage the drum surface after taking the drum unit out of the machine.
(The bottom of the drum is not protected by a shutter). When placing it on the floor, in
particular, check to make sure that the floor surface is flat and is free of foreign matter;
further, lay a sheet of paper underneath.
• Do not place the drum unit near a window, to avoid direct rays of the sun.
• Do not rotate the injection cylinder or the developing cylinder in the wrong direction;
otherwise, the agent inside will leak.
• Do not clean the drum. (Wiping its surface layer can trigger image faults.)
2.2 After Replacing the Drum Unit
1) Mount the new drum unit; then, assemble the printer unit to its original state.
2) Connect the power plug, and turn on the main power switch.
3) Execute idle rotation of the developing assembly in service mode:
COPIER>FUNCTION>INSTALL>STIR-Y/M/C/K.
4) Execute auto gradation correction in user mode.