Service manual

27
9. PRODUCT TECHNICAL INFORMATION
9-1. FAQ (Problems specific to the iP4300 and corrective actions)
No. Rank Function Phenomenon Condition Cause Corrective action Possible call or complaint
1 C Paper
feeding
Paper feeding problems
- Jam
- Skewed paper feeding
- Low temperature and low
humidity environment
- Paper feeding from the cassette
- Round-trip postcard
Due to curl of a round-trip postcard in
the low temperature and low humidity
environment, the paper return tab of the
U-turn path opposite to the home
position may not completely return to the
original position before the postcard is
picked up. In this way, the postcard is
skewed at the home position side,
resulting in skewed paper feeding or
jam.
- Eliminate the curl of the
round-trip postcard.
- Set the round-trip postcard in the
ASF.
- Paper jams.
- Paper feeds at an angle.
2 C Print
results
Skewed paper feeding (at
the level of +/- 1%)
- Paper feeding from the ASF
- Credit Card size
Since coaxial tolerance between the
pinch roller and the LF roller, which
determines the paper feed alignment, is
0.2mm, skewed paper feeding can
occur. However, according to the field
data of current models, the skewness
level caused by the coaxial tolerance of
0.2mm is within the criteria of +/- 1%,
thus the phenomenon is left as is.
- Align the paper guide to the
paper edge tighter than usual.
- Paper feeds at an angle.
- A margin appears on
printouts.
3 A Print
results
Soiling on the back side of
paper (lines or streaks
parallel to the paper feed
direction)
- After continuous borderless
printing of small sized paper
(such as 4 x 6), when a larger
sized paper (such as A4) is
printed.
- With Photo Paper Plus Double
Sided or postcards, the
phenomenon is likely to be
noticeable and to be complained
of by users, as printing is
performed on both sides of such
paper.
In borderless printing, printing is
performed to the size slightly larger than
the paper size, and ink off the paper is
absorbed by the platen's ink absorber.
Absorbed ink may attach to the platen
rib(s) after several dozen sheets are
printed, causing soiling at the leading
edge of paper or on the back side of
paper.
1. Perform Bottom plate cleaning
(from the printer driver) up to 3
times
*1
.
2. If soiling on the paper still
remains after 3 times of Bottom
plate cleaning, wipe the platen
rib(s) and their surroundings
with a cotton swab.
- Paper gets smeared.
- The back side of paper
gets smeared.