Canon imagePROGRAF iPF770 User Guide - Page 485

iPF770 8 Examine the test pattern for adjustment. Determine the +6 straightest set of lines. Troubleshooting Paper Abrasion and Blurry Images +4 +2  -2 -4 -6 9 Open the Top Cover and move the Angle Adjustment Lever to match the number (or the square) of the straightest set of lines. If no single set of lines is perfectly straight, move the Angle Adjustment Lever to a position between the numbers (or between the number and the square) of the two sets of lines that are least misaligned. 10 Close the Top Cover. The Printhead is now straight, and adjustment is complete. Adjustments for Better Print Quality Adjusting the Printhead Troubleshooting Paper Abrasion and Blurry Images The Printhead height setting affects printing quality. Specifying a low Printhead height makes images clearer and enhances printing quality but may cause paper to rub against the Printhead. On the other hand, specifying a high Printhead height will prevent paper from rubbing against the Printhead but may reduce the printing quality. • Paper rubbing against or becoming caught on the Printhead may jam or result in printed documents that are Important soiled. • Raise or lower the printhead, depending on the nature of the problem. Note (See "Paper rubs against the Printhead.") ➔P.539 (See "The edges of the paper are dirty.") ➔P.539 (See "Image edges are blurred or white banding occurs.") ➔P.542 1 On the Tab Selection screen of the Control Panel, press ◀ or ▶ to select the Paper tab ( ). 485 • If the Tab Selection screen is not displayed, press the Menu button. Note 2 Press the OK button. The Paper Menu is displayed. User's Guide