If your printouts contain misaligned vertical lines, or you see light or dark horizontal banding, you may need to align the print head.
- Make sure the printer is on but not printing, and several sheets of paper are loaded.
- Windows: Right-click the printer icon on your taskbar (in the lower right corner of your screen).
Macintosh OS 8.6 to 9.x: From the File menu, select Page Setup or Print. Click the Utility button, then click the Print Head Alignment button.
Macintosh OS X: Open the Applications folder and select EPSON Printer Utility. Select SP 900 in the printer list, click OK, and select Print Head Alignment.
- Select Print Head Alignment.
- Follow the instructions on the screen to print a test page. You see a window like the one shown below:
- On the test page, select the pattern with the two vertical lines most precisely printed on top of each other. You may need to use a magnifying glass or loupe.
Select one pattern each for rows 1 through 3. Enter the number of the best pattern for each row in the corresponding boxes on the screen. Then click Next.
If you can't find an aligned pattern, choose the one that's closest to being aligned. Then click Realignment to print another test page and repeat this step.
- After you click Next, you see a window similar to this one:
- Click Print to print the first pattern on the test page.
- After it prints, remove and reload the test page as shown, with pattern row #1 on the right.
- Click Print again to print the second test pattern.
- On the test page, select a box for columns 1 and 2 that does not contain any light or dark banding.
- Enter the number of the best looking box in each column in the corresponding boxes on the screen and click Finish.
If you can't find a box that doesn't contain banding, choose the one that looks the best. Then click Realignment to print another test page and repeat steps 6 through 11.