Canon iP4200 Service Manual - Page 15

- print head*2, or - logic board ass'y*1, remove foreign material from the purge unit caps, if any, or replace the purge unit. Printing is faint, or white lines appear on printouts even after print head cleaning. Line(s) not included in the print data appears on printouts. Remove and re-install the print head, or replace the - ink tank, - print head*2, - purge unit, or - logic board ass'y*1. Paper gets smeared. A part of a line is missing on printouts. Color hue is incorrect. Unsatisfactory print quality Feed several sheets of paper, perform bottom plate cleaning, clean the paper path with cotton swab or cloth, or clean the ASF sub-rollers. Replace the - ink tank, or - print head*2. Replace the - ink tank, or - print head*2, or perform print head alignment. Printing is incorrect. No ejection of black ink. Graphic or text is enlarged on printouts. Replace the logic board ass'y*1. Replace the - ink tank, or - print head*2, or remove foreign material from the purge unit caps, if any, or replace the purge unit. When enlarged in the carriage movement direction, clean grease or oil off the timing slit strip film, or replace the - timing slit strip film, - carriage unit, or - logic board ass'y*1. When enlarged in the paper feed direction, clean grease or oil off the timing slit disk film, or replace the - timing slit disk film, - timing sensor unit, or - logic board ass'y*1. 1-10