Canon PIXMA MP950, Service Manual

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6 C Print results
- Paper feeding from the
cassette
from the cassette, and
duplex printing path. to the auto sheet feeder.
- 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.
printed paper.
- PP-101D, PP-101, PR-101,
SG-101, etc.
- Paper feeding from the ASF
- Multiple number of sheets
loaded
When multiple sheets of
paper are set, the back side
of paper being picked up
scratches the front side of
paper beneath (especially
where the paper feed
rollers contact when
picking up the paper). Set only a single sheet of
paper in the auto sheet
feeder.
7 C Print results
Soiling on paper The machine has been used for
a long period of time with the
ASF cover closed before
printing is performed using the
ASF. Due to ink mist attached to
the ASF sub-pick-up
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.
Clean the ASF sub-rollers
(see *3 for details).
8 B Print results
Skewed paper
feeding - SG-101
- Paper feeding from the ASF
- 10 sheets (max.) set in the
ASF
When 10 sheets of paper
are set in the ASF, and if
they warp significantly, the
warping portions of paper
get over the cover guide,
not being aligned along the
guide properly. - Straighten the paper.
- Set 5 or less sheets of
paper in the ASF.
- Paper feeds at an
angle.
- A margin appears on
printouts.
9 B Print results
Uneven printing at
the trailing edge of
paper - In the low temperature and
low humidity environment
Due to decrease of the
friction coefficient and
inaccurate print head
alignment. - Perform Manual print
head alignment.
- Perform Bottom plate
cleaning.
- Uneven printing at
the bottom of the
paper.
10 B Print results
Print smeared
- When the inner cover is not
completely closed.
- High-density image printing
When printing on paper is
done with the inner cover
open, the print
immediately after ink is
ejected on paper is
scratched by the bottom of
the inner cover, resulting in
smeared print. Close the inner cover
completely. - Printing gets
smeared.
11 A
Image
scanning
Spots on a scanned
image - Glossy photo (original)
- In the high humidity
environment
When a glossy photo is
strongly pressed on the
platen glass, the photo will
stick to the glass, and the
stuck points are scanned as
spots. - Do not strongly press the
photo on the platen glass.
- Clean the platen glass (to
eliminate any moisture).
- Spots appear on the
scanned image,
though there is no
such spots on the
original document.
12 C
Display on
the LCD
Improper trimming
in Layout print
(orientation
difference of an
image between the
LCD and a printout) - Card Direct printing
- Photos taken with a DoCoMo
mobile phone
For photos in general, both
the thumbnail and the
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.
The phenomenon is left as
is. - Print result differs
from what is
displayed on the
LCD.
13 A
Image
scanning
Improper area of
cropping, or skewed
scanning - Scanning using MP
Navigator
- MP Navigator settings:
Document type:
Black and white document,
or color document
Document size:
Auto detect
Due to a bug in MP
Navigator 2.0.
Since the automatic
cropping process is
incorrect, improper
correction of skewed
scanning is done
depending on a document,
resulting in the skewed
scanning.
- An information sheet
regarding the
phenomenon is packed
with the machine in early
production.
- MP Navigator will be
upgraded on a running-
change basis.
- If the phenomenon
occurs, cancel "auto
detect" and select the
paper size (the full paper
size). Trim margins
- An image is scanned
at an angle.
- Some portions of an
image is not
scanned.
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