Canon imageRUNNER ADVANCE 715iF III Series Service Manual page 262

■ Halftone (TYPE=5/6/11/12/13/14)
NOTE:
When outputting a halftone test print, be sure to use PG TYPE:6 except in the following cases.
1. When checking the image of side registration adjustment, use PG TYPE:11.
Check item
Transfer fail- Check the evenness of halftone density. Check whether
ure uneven image or foggy image appears.
Black line Check whether black lines appear on the image.
White line Check whether white lines appear on the image.
Uneven pitch Check whether lines appear on the image in the horizontal
scanning direction.
Uneven densi- Check the density difference between the front and rear
ty(rear/front) sides.
Side registra- Check the left margin.
tion
Shock Check whether horizontal lines appear on the image.
■ Solid black (TYPE=7)
Check item
Transfer fail- Check the evenness of halftone density. Check whether
ure uneven image or foggy image appears.
Check method
Check method
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Assumed cause
Transfer system failure or transfer roller failure is consid-
ered.
Laser light path failure, grid failure, developing system fail-
ure, cleaning (drum) failure or transfer roller failure is con-
sidered.
Developing system failure is considered.
Drum failure, developing system failure, laser exposure sys-
tem failure or drive-related failure is considered.
Drum failure or developing system failure is considered.
Floor at the installation site is extremely distorted, or the feed
system failure is considered.
Rollers' feed system failure or laser exposure system failure
(drum, Laser Scanner) is considered.
Assumed cause
Transfer system failure is considered.
6. Troubleshooting