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COPYRIGHT © 2006 CANON ELECTRONICS INC. CANON DR-1210C FIRST EDITION FEB. 2006
CHAPTER 5 TROUBLESHOOTING
6. Spots and Streaks on Image
If the reading glass surface is dirty when the flatbed scanning is used, the state of the spot on
the glass (shape and color) appears on the scanned image. In case of the feeder scanning,
spots on the feed system including the feed roller etc. appear on the document or those on
the reading glass for the feeder make streaks in the feed direction on the scanned image.
On the other hand, white streaks appearing on the scanned images for both flatbed and
feeder scanning are caused by dirty shading sheet in most cases. In particular, if white
streaks appear outstanding in a slightly light area on a color image, it can be said that it is
caused by dirty shading sheet.
Cause/Faulty
location
Step Check
item Result
Action
Roller unit and separa-
tion pad (for feeder
scanning)
1
Are the surfaces clean?
NO
Clean or replace the
roller unit and/or the
separation pad.
Feed unit (for feeder
scanning)
2
Is the feed path clean?
NO
Clean.
NO Clean.
Replace the main body
if scratches are found or
the back surface is dirty.
Reading glass
3
Are the reading glasses
clean?
(for both flatbed and feeder
scanning)
YES The reading unit or the
shading sheet is faulty.
Replace the main body.
Table 5-406