Canon imageRUNNER ADVANCE C350 series, Service Manual

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Troubleshooting > Test Print > How to use the test print > 16 gradations (TYPE=4)
Troubleshooting > Test Print > How to use the test print > 16 gradations (TYPE=4)
How to use the test print
■ 16 gradations (TYPE=4)
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
Failure of Laser Scanner Unit
Fogging Check that fogging occurs on white image area only. Failure of Drum Unit
Failure of Laser Scanner Unit
White line Check that white line does not appear on entire image. Failure of Drum Unit
Uneven density at
front & rear
Check that uneven density does not appear at front & rear. Failure of Drum Unit
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