Canon PIXMA MP800 Service Manual - Page 53

5. FAQ (Problems Specific to the MP800 and Corrective Actions) No. * Function Phenomenon Condition Cause Corrective action Possible call or complaint 1B Skewed paper feeding Print results - Paper feeding from the Due to its cassette, Photo Paper mechanism, contact Plus Double Sided, 5 of the PF pinch x 7 size rollers to the 5 x 7 size paper is uneven, which is likely to cause skewed paper feeding. Change the paper feeding method from the cassette to the auto sheet feeder. - Paper feeds at an angle. - A margin appears on printouts. Improper paper - Paper feeding from the In the high - Reduce the amount - Multiple sheets feeding: ASF temperature and high of paper set in the of paper feed at - Multi-feeding - Skewed paper feeding - Paper jam - Plain paper - Highest print speed (Custom setting to 5) humidity environment, paper becomes wavy; in the low temperature and - In the high temperature low humidity and high humidity environment, paper ASF to half (approx. 5 mm high). the same time. - Paper feeds at an angle. - A paper jam occurs. environment curls significantly. 2 B Paper feed - In the low temperature When the maximum and low humidity amount of paper is environment set in the ASF, and if the paper-return tab - With the maximum fits in a wave or curl amount of paper set of the paper, the tab (13 mm) slips and does not catch paper properly, causing paper feed problems. 3C Print results Skewed paper feeding (at the level of +/- 1%) - Paper feeding from the Since coaxial - Align the paper ASF tolerance between the guide to the paper - Credit Card size pinch roller and the LF roller, which edge tighter than usual. 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. - Paper feeds at an angle. - A margin appears on printouts. 4A Print results Soiling on the - After continuous In borderless 1. Perform Bottom back side of borderless printing of printing, printing is plate cleaning paper (lines or small sized paper performed to the size (from the MP streaks parallel to (such as 4 x 6), when slightly larger than driver or via the the paper feed a larger sized paper the paper size, and operation panel) direction) (such as A4) is ink off the paper is up to 3 times*1. printed. absorbed by the - With Photo Paper Plus platen's ink absorber. Double Sided or Absorbed ink may postcards, the attach to the platen phenomenon is likely rib(s) after several to be noticeable and to dozen sheets are be complained of by printed, causing users, as printing is soiling at the leading performed on both edge of paper or on sides of such paper. the back side of paper. 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. Soiling on paper in automatic duplex printing (lines or streaks - Automatic duplex On the rib(s) inside printing (Photo Paper the sheet feed unit Plus Double Sided, used for duplex postcards, plain paper) printing, ink mist Temporary operational solution: Cancel automatic - Paper gets smeared. - The back side of paper gets 2-9