Canon iR C6800 Series, Руководство по обслуживанию

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Chapter 13
13-6
13.2.5
Full Page Halftone (TYPE=5)
0001-6115
Use this test print to check a transfer fault, black line, white line, and uneven density at specific intervals.
Memo:
You can print out test prints for individual colors by making the following selections in service mode:
COPIER>TEST>PG and then COLORY/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-13-2
COLOR-M=1, COLOR-Y/C/K=0