Canon BJC-8500 Service Manual

Also see for BJC-8500: User manual

Contents

3) Adjusting the print head positionAs two print heads are installed on the printer, differences sometimes occur in the dotplacement of ejected ink, and high-grade printing sometimes cannot be obtaineddepending on the individual characteristics specific to each print head and installationstate. To eliminate these differences, the mutual positions of the print heads must beadjusted as follows after the Canon printer driver has been installed.Procedure1) Load two or more sheets of A4-size plain paper in the sheet feeder.2) Select "Test Prints" under Maintenance Sheet in the printer driver, and print thehead position adjustment pattern (Figure 3-8 Checking the Position of the Print Head(1)).3) Visually check the printed pattern, and select the optimum pattern at each of A(vertical direction between two heads -1 to +1; one unit = 1/600 inch), B(horizontal direction between two heads -7 to +7; one unit = 1/600 inch) and C(bi-direction of one head -7 to +7; one unit = 1/1200 inch).4) Follow the instructions on Maintenance Sheet in the printer driver, and print thehigh-resolution adjustment pattern (Figure 3-9 Checking the Position of the Print Head(2) (page 3-7)) .5) Visually check the printed patterns, and select the optimum pattern at D(horizontal direction between two heads -1 to +1; one unit = 1/1200 inch).6) Follow the instructions on Maintenance Sheet in the printer driver, and end theprint head position adjustment.7) The dot placement of the ink after adjustment can be checked by outputting a testprint (nozzle check pattern).Part 3: Operating Instructions BJC-85003-6Figure 3-8 Checking the Position of the Print Head (1)