Canon imageRUNNER Advance C475 III

16 Gradations (TYPE = 4)

This test print is mainly used to check gradation performance, fogging, white lines, and uneven density between the front and rear sides.

Check item	Checking Method	Assumed cause
Gradation	Check that the 16 density gradations are recognizable.	Drum Unit error or Laser Scanner Unit error
Fogging	Check whether fogging appears only in the blank area.	Drum Unit error or Laser Scanner Unit error
White line	Check the entire image for any white line.	Drum Unit error or Laser Scanner Unit error
Uneven density (rear/front)	Check for any uneven density between the rear and front sides	Drum Unit error, Laser Scanner Unit error, or soiling on the laser light path

Full Page Halftone (TYPE = 5)

This test print is mainly used to check for black lines, white lines, and uneven density.

NOTE:
Various settings can be configured in the following service mode.

Output of each developing color
COPIER > TEST > PG > COLOR-Y
COPIER > TEST > PG > COLOR-M
COPIER > TEST > PG > COLOR-C
COPIER > TEST > PG > COLOR-K

Print density setting
TEST>PG>DENS-Y
TEST>PG>DENS-M
TEST>PG>DENS-C
TEST>PG>DENS-K

Check item	Checking Method	Assumed cause
Transfer failure	Check the entire image for any transfer failure.	ITB error (scratches or soiling)
		Primary Transfer Roller error (scratches or soiling)
		Secondary Transfer Roller error (scratches or soiling)
Black line (colored line)	Check the entire image for any black line.	Damage to the Drum Unit
White line	Check the entire image for any white line.	ITB Unit error
		Secondary Transfer Outer Roller error
		Soiling on the laser light path
Uneven density at regular intervals	Check the entire image for any uneven density at regular intervals.	Drum Unit error
Uneven density	Check the entire image for any uneven density.	Soiling on the Dustproof Glass
		Deterioration of the ITB

Grid (TYPE=6)

This test print is mainly used to check color displacement, right angle accuracy, and linearity.

Check item	Checking Method	Assumed cause
Color displacement	Check that there is no displacement between the lines of the respective colors.	Laser Scanner Unit error
		ITB Unit error
		Soiling on the Registration Sensor
		Secondary Transfer Roller error
		Main Drive Unit (drum rotation) error
Right angle accuracy and linearity	Check that there is nothing wrong with the right angle accuracy and linearity between the lines of the respective colors.	Laser Scanner Unit error
		Registration Roller error
		Secondary Transfer Outer Roller error

MCYBk Horizontal Stripes (TYPE = 10)

This test print is mainly used to check the dark area density of each color, the balance between colors, and white lines that occur during development.

Check item	Checking Method	Assumed cause
Uneven density	Check that there is no uneven density in the solid area of each color.	Laser Scanner Unit error
		Error in supplying toner to the Drum Unit
		Primary Transfer Roller error
Black line (colored line)	Check that there is no black line (colored line) in the solid area of each color.	Damage to the Drum Unit
		Soiling on the Primary Charging Roller
White line	Check that there is no white line in theITB Unit error solid area of each color.	ITB Unit error
		Secondary Transfer Outer Roller error
		Soiling on the laser light path

64 Gradations (TYPE = 12)

This test print is mainly used to check the single color gradation performance of each of Y, M, C, and Bk at a time.

Check item	Checking Method	Assumed cause
Gradation	Check that the 64 density gradations are recognizable.	Drum Unit error or Laser Scanner Unit error
Fogging	Check whether fogging appears only in the blank area.	Drum Unit error or Laser Scanner Unit error
White line	Check the entire image for any white line.	Drum Unit error or Laser Scanner Unit error