32 Routine Maintenance(2) Repeat the procedure until you finish selecting the pattern number for column L.(3) Place the Print Head Alignment Sheet face-down on the Platen Glass.When placing the Print Head Alignment Sheet, place the front side down and align theupper left corner of it with the alignment mark as shown in the figure below.(4) Make sure that U is displayed on the LED, then press the Black or Color button.The Print Head Alignment Sheet is scanned and the print head is aligned automatically.NoteIf it is difficult to pick the best pattern, pick the setting that produces the least noticeable whitestreaks.(A) Less noticeable vertical white streaks(B) More noticeable vertical white streaks(C) Less noticeable horizontal white streaks(D) More noticeable horizontal white streaksNotez If adjustment is not done successfully, the error code is displayed on the LED. In this case,start over from step 1 to print a new Print Head Alignment Sheet. For details, see “An ErrorCode Is Displayed on the LED” on page 44.z If the results of Print Head Alignment on the machine are not satisfactory, perform PrintHead Alignment on the computer. For details, refer to “Aligning Print Head on theComputer” in the User’s Guide on-screen manual.z To adjust columns M to R, you need to perform the print head alignment on your computer.For details, refer to “Aligning Print Head on the Computer” in the User’s Guide on-screenmanual.(A) (B)(C) (D)