Canon imageRUNNER ADVANCE C3330 Series, Service Manual

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■ MCYBk horizontal stripe (TYPE=10)
This test print is for mainly checking the dark area density of each color, each color balance and white line on development.
Check items Check method Assumed cause
Uneven density Check that uneven density does not appear on solid area of each
color Failure of Laser Scanner Unit
Failure of developer in Drum Unit
Failure of Primary Transfer Roller
Black line (color line) Check that black line (color line) does not appear on solid area of
each color Scratch on Photosensitive Drum
Dirt on Primary Charging Roller
White line Check that white line does not appear on solid area of each color Failure of ITB Unit
Failure of Secondary Transfer Outer Roller
Dirt on Laser Light Path
■ 64-gradations (TYPE=12)
This test print is for mainly checking the gradations of YMCBk single color at one time.
Check item Check method Assumed cause
Gradation Check that 64 gradations density is properly reproduced. Failure of Drum Unit
Failure of Laser Scanner Unit
Fogging Check that fogging appears on white image area only. Failure of Drum Unit
Failure of Laser Scanner Unit
White line Check that there is no white line on entire image. Failure of Drum Unit
6. Troubleshooting
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