Canon PIXMA MP950 Service Manual page 50

6 C Print results
Soiling on paper
7 C Print results
Skewed paper
feeding
8 B Print results
Uneven printing at
the trailing edge of
9 B Print results
paper
Print smeared
10 B Print results
Spots on a scanned
image
Image
11 A
scanning
Improper trimming
in Layout print
(orientation
difference of an
image between the
Display on
LCD and a printout)
12 C
the LCD
Improper area of
cropping, or skewed
scanning
Image
13 A
scanning
- Paper feeding from the
cassette
- PP-101D, PP-101, PR-101,
SG-101, etc.
- Paper feeding from the ASF
- Multiple number of sheets
loaded
The machine has been used for
a long period of time with the
ASF cover closed before
printing is performed using the
ASF.
- SG-101
- Paper feeding from the ASF
- 10 sheets (max.) set in the
ASF
- In the low temperature and
low humidity environment
- When the inner cover is not
completely closed.
- High-density image printing
- Glossy photo (original)
- In the high humidity
environment
- Card Direct printing
- Photos taken with a DoCoMo
mobile phone
- Scanning using MP
Navigator
- MP Navigator settings:
Document type:
Black and white document,
or color document
Document size:
Auto detect
2-10
from the cassette, and to the auto sheet feeder.
duplex printing path.
- If automatic duplex
printing is performed,
cancel it, and, by setting
only a single sheet of
paper in the auto sheet
feeder, manually print
each side of paper.
When multiple sheets of Set only a single sheet of
paper are set, the back side paper in the auto sheet
of paper being picked up feeder.
scratches the front side of
paper beneath (especially
where the paper feed
rollers contact when
picking up the paper).
Due to ink mist attached to Clean the ASF sub-rollers
the ASF sub-pick-up (see *3 for details).
rollers.
If printing is done from the
cassette with the ASF
cover closed, ink mist is
kept inside the machine,
attaching to the ASF sub-
pick-up rollers.
Since the sub-rollers
usually do not contact the
paper, ink mist can easily
accumulate, especially
during printing on small-
sized paper which never
contacts the sub-rollers.
When 10 sheets of paper - Straighten the paper.
are set in the ASF, and if
- Set 5 or less sheets of
they warp significantly, the
paper in the ASF.
warping portions of paper
get over the cover guide,
not being aligned along the
guide properly.
Due to decrease of the - Perform Manual print
friction coefficient and head alignment.
inaccurate print head
- Perform Bottom plate
alignment.
cleaning.
When printing on paper is Close the inner cover
done with the inner cover completely.
open, the print
immediately after ink is
ejected on paper is
scratched by the bottom of
the inner cover, resulting in
smeared print.
When a glossy photo is - Do not strongly press the
strongly pressed on the photo on the platen glass.
platen glass, the photo will
- Clean the platen glass (to
stick to the glass, and the
eliminate any moisture).
stuck points are scanned as
spots.
For photos in general, both The phenomenon is left as
the thumbnail and the is.
original image are in
landscape.
However, when original
images are in portrait while
thumbnails are in
landscape, the trimming
frame shifts from the
correct position in some
instances.
Due to a bug in MP - An information sheet
Navigator 2.0. regarding the
phenomenon is packed
Since the automatic
with the machine in early
cropping process is
production.
incorrect, improper
correction of skewed - MP Navigator will be
scanning is done upgraded on a running-
depending on a document, change basis.
resulting in the skewed
- If the phenomenon
scanning.
occurs, cancel "auto
detect" and select the
paper size (the full paper
size). Trim margins
printed paper.
- Paper feeds at an
angle.
- A margin appears on
printouts.
- Uneven printing at
the bottom of the
paper.
- Printing gets
smeared.
- Spots appear on the
scanned image,
though there is no
such spots on the
original document.
- Print result differs
from what is
displayed on the
LCD.
- An image is scanned
at an angle.
- Some portions of an
image is not
scanned.