Canon imageRUNNER ADVANCE C5500 Series Service Manual page 458

NOTE:
1. Select: service mode > COPIER > TEST > PG and specify developing color "COLOR-Y/M/C/K" to output the print by
developing color.
2. To change the density of test print, select: service mode > TEST > PG > DENS-Y/M/C/K and set the density.
Check item
Transfer failure
Black line
(color line)
White line
Uneven pitch
Uneven density
■ Grid (TYPE=6)
This test print is for mainly checking the color displacement, right angle accuracy and straight line accuracy.
Check items
Uneven density
Black line (color line)
White line
Check method
Check that the transfer failure does not ap-
pear on entire image.
Check that black line does not appear on
entire image.
Check that white line does not appear on
entire image.
Check that uneven pitch does not appear on
entire image.
Check that uneven density does not appear
on entire image.
Check method
Check that uneven density does not appear
on solid area of each color
Check that black line (color line) does not
appear on solid area of each color
Check that white line does not appear on
solid area of each color
444
6. Troubleshooting
Assumed cause
Failure of ITB (scratch, dirt)
Failure of Primary Transfer Roller (scratch,
dirt)
Failure of Secondary Transfer Roller
(scratch, dirt)
Scratch on Photosensitive Drum
Dirt on Primary Charging Roller
Failure of ITB Unit
Failure of Secondary Transfer Outer Roller
Dirt on laser light path
Failure of Photosensitive Drum (approx.
94mm)
Failure of Developing Cylinder (approx.
94mm)
Dirt on Dustproof Glass
Deterioration of ITB
Assumed cause
Failure of Laser Scanner Unit
Failure of developer in Developing Assem-
bly
Failure of Primary Transfer Roller
Scratch on Photosensitive Drum
Dirt on Primary Charging Roller
Failure of ITB Unit
Failure of Secondary Transfer Outer Roller
Dirt on Laser Light Path