Print Head Position Adjustment - Canon S520 Service Manual

Part 2: Troubleshooting

4.1.3 Print head position adjustment

The print head has two nozzle arrays for each color. Therefore, it requires ink (dot)
placement adjustment in addition to the usual bi-directional adjustment.
If dot placement is inaccurate, the pattern will have overlapping printing or gaps,
resulting in black or white stripes. Therefore, when conducting alignment, choose
patterns free of stripes.
Load one sheet of A4 paper in the auto sheet feeder, and use the printer driver to
conduct alignment.
1) S900/S820
(1) Dot placement adjustment of the two arrays for each color.
• Black
• Cyan
• Magenta
• Photo cyan
• Photo magenta (E)
✽ Since yellow is difficult to judge and has little effect on images, adjustment is
not necessary and the same settings as for magenta are applied automatically.
(2) Bi-directional placement adjustment
• Black bi-directional (F)
Figure 2-10 Print Position Adjustment Pattern (S900/S820)
(A)
(B)
(C)
(D)
2-22
S900 / S820 / S750 / S520