ATroubleshooting_ 155Copying problemsCharacter Voids Character voids are white areas within parts ofcharacters that should be solid black:• If you are using transparencies, try anothertype of transparency. Because of thecomposition of transparencies, somecharacter voids are normal.• You may be printing on the wrong surface ofthe paper. Remove the paper and turn itaround.• The paper may not meet paperspecifications (see "Print mediaspecifications" on page 165).Horizontal stripes If horizontally aligned black streaks or smearsappear:• The imaging unit may be installedimproperly. Remove the imaging unit andreinsert it.• The imaging unit may be defective. Removethe imaging unit and install a new one.Contact a service representative.• If the problem persists, the machine mayrequire repair. Contact a servicerepresentative.Curl If the printed paper is curled or paper does notfeed into the machine:• Turn the stack of paper over in the tray. Alsotry rotating the paper 180° in the tray.• Change the printer option and try again. Goto Printing Preferences, click Paper tab,and set type to thin paper (see "Openingprinting preferences" on page 101).An unknown imagerepetitivelyappears on a fewsheets or loosetoner, light print, orcontaminationoccurs.Your machine is probably being used at analtitude of 1,000 m (3,281 ft) or above.The high altitude may affect the print quality,such as loose toner or light imaging. Change thecorrect altitude setting to your machine.Condition Suggested SolutionsCondition Suggested solutionCopies are too lightor too darkUse Light and Dark arrows to lighten or darkenthe backgrounds of copies in the Basic tab ofthe Copy menu.Smears, lines,marks, or spotsappear on copies.• If the defects are on the original, pressleft/right arrow to lighten the background ofyour copies in the Basic tab of the Copymenu (see "Changing the darkness" onpage 54).• If there are no defects on the original, cleanthe scan unit. Cleaning the scan unit orcontact a service representative.Copy image isskewed.• Ensure that the original is face down on thescanner glass or face up in the DADF.• Check that the copy paper is loaded correctly.• If the problem persists, the machine mayrequire repair. Contact a servicerepresentative.Blank copies printout.Ensure that the original is face down on thescanner glass or face up in the DADF.Image rubs off thecopy easily.• Replace the paper in the tray with paper froma new package.• In high humidity areas, do not leave paper inthe machine for extended periods of time.Frequent copy paperjams occur.• Fan the stack of paper, then turn it over in thetray. Replace the paper in the tray with a freshsupply. Check/adjust the paper guides, ifnecessary.• Ensure that the paper is the proper paperweight.• Check for copy paper or pieces of copy paperremaining in the machine after a paper jamhas been cleared.Toner cartridgeproduces fewercopies thanexpected beforerunning out of toner.• Your originals may contain pictures, solids, orheavy lines. For example, your originals maybe forms, newsletters, books, or otherdocuments that use more toner.• The DADF may be left open while copies arebeing made.• The machine may be turned on and offfrequently.
