Canon iR C6800 Series, Portable Manual

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Chapter 5
5-3
Memo:
- You can print out test prints for individual colors by making the following selections in service mode:
COPIER>TEST>PG and then COLOR-Y/M/C/K.
- You can also change the density of the test prints by making the following selections in service mode:
TEST>PG>DENS>Y/M/C/K.
a. Transfer Fault
If a transfer fault is found, suspect a fault in the ITB unit or the secondary transfer outside roller.
b. Black Line
If a black line is found, suspect a scar in the photosensitive drum or dirt on the primary charging roller.
c. White Line
If a white line is found at the same location for all colors, suspect a fault in the ITB unit or the secondary transfer
outside roller.
If it is found in different locations, or it is found in a specific color, suspect a fault in the drum unit or the laser
exposure system.
d. Uneven Density at Specific Intervals
If the uneven density is at specific intervals, suspect the following:
- if at 194.7 mm, photosensitive drum.
- if at 37.6 mm, developing cylinder
e. Uneven Density
If uneven density is found, suspect dirt on the dust blocking glass of the laser scanner unit and deterioration of the
ITB.
F-5-2
5.1.6 Grid (TYPE=6)
0001-6117
iR C6800C / iR C6800CN / iR 5800C / iR 5800CN
Use this text print to check color displacement, right angles, and straight lines.
COLOR-M=1, COLOR-Y/C/K=0