Canon imageRUNNER ADVANCE C5255 Series Service Manual page 544

■ 64-gradations (TYPE=12)
■ Full color 16-gradations (TYPE=14)
White
6
Troubleshooting > Test Print > How to use the test print > Full color 16-gradations (TYPE=14)
This test print is for mainly checking the gradations of YMCBk single color at one time.
Check item
Gradation
Fogging
White line
F-6-5
This test print is for mainly checking the gray balance, gradations of YMCBk singe color and fogging.
Check item
Gradation
Fogging
Light areas
Gray balance
White
F-6-6
6 Troubleshooting > Test Print > How to use the test print > Full color 16-gradations (TYPE=14)
Check method
Check that 64 gradations density is properly reproduced.
Check that fogging appears on white image area only.
Check that there is no white line on entire image.
Check method
Check that 64 gradations density is properly reproduced in
each color.
Check that fogging appears on white image area only.
Check that density is even in each color on gray scale area.
6-6
Assumed cause
Failure of Drum Unit (end of life)
Failure of Laser Scanner Unit
Failure of Drum Unit (end of life)
Failure of Laser Scanner Unit
Failure of Developing Assembly
T-6-7
Assumed cause
Failure of Drum Unit (end of life)
Failure of Laser Scanner Unit
Failure of Drum Unit (end of life)
Failure of Laser Scanner Unit
Failure of Drum Unit (end of life)
T-6-8
6-6