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Troubleshooting > Test Print > How to use the test print > Full half tone (TYPE=5)
Troubleshooting > Test Print > How to use the test print > Full half tone (TYPE=5)
How to use the test print
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16 gradations (TYPE=4)
F-6-1
This test print is for mainly checking the gradation, fogging, white line and uneven density at front & rear.
Check item
Check method
Assumed cause
Gradation
Check that 16 density gradation is properly reproduced.
Failure of Drum Unit (end of life)
Failure of Laser Scanner Unit
Fogging
Check that fogging occurs on white image area only.
Failure of Drum Unit (end of life)
Failure of Laser Scanner Unit
White line
Check that white line does not appear on entire image.
Failure of Developing Assembly
Uneven density at
front & rear
Check that uneven density does not appear at front & rear.
Failure of Photosensitive Drum (approx. 94mm)
Failure of Developing Cylinder (approx. 63mm)
T-6-3
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Full half tone (TYPE=5)
F-6-2
This test print is for mainly checking the black line, white line and uneven density.
MEMO:
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
Check method
Assumed cause
Transfer failure
Check that the transfer failure does not appear on entire image. Failure of ITB (scratch, dirt)
Failure of Primary Transfer Roller (scratch, dirt)
Failure of Secondary Transfer Roller (scratch, dirt)
Black line
(color line)
Check that black line does not appear on entire image.
Scratch on Photosensitive Drum
Dirt on Primary Charging Roller
White line
Check that white line does not appear on entire image.
Failure of ITB Unit
Failure of Secondary Transfer Outer Roller
Dirt on laser light path
Uneven pitch
Check that uneven pitch does not appear on entire image.
Failure of Photosensitive Drum (approx. 94mm)
Failure of Developing Cylinder (approx. 94mm)
Uneven density Check that uneven density does not appear on entire image.
Dirt on Dustproof Glass
Deterioration of ITB
T-6-4