10.10 < Troubleshooting>Copying problemsCondition Suggested solutionsCopies are too lightor too dark.Use Darkness to darken or lighten thebackground of the copies.Smears, lines,marks, or spotsappears on copies.• If defects are on the original, use Darknessto lighten the background of your copies.• If no defects are on the original, clean thescan unit. See page 9.3.Copy image isskewed. • Ensure that the original is face down on thescanner glass.• Check that the copy paper is loadedcorrectly.Blank copies printout.Ensure that the original is face down on thescanner glass.Image rubs off thecopy easily. • Replace the paper in the tray with paperfrom a new package.• In high humidity areas, do not leave paperin the machine for extended periods oftime.Frequent copypaper jams occur. • Fan the stack of paper, then turn it over inthe tray. Replace the paper in the tray witha fresh supply. Check/adjust the paperguides, if necessary.• Ensure that the paper is the proper paperweight. 75 g/m2 (20 lb bond) paper isrecommended.• Check for copy paper or pieces of copypaper remaining in the machine after apaper jam has been cleared.Toner cartridgeproduces fewercopies thanexpected beforerunning out oftoner.• Your originals may contain pictures, solids,or heavy lines. For example, your originalsmay be forms, newsletters, books, or otherdocuments that use more toner.• The machine may be turned on and offfrequently.• The scanner cover may be left open whilecopies are being made.Scanning problemsCondition Suggested solutionsThe scanner doesnot work. • Make sure that you place the original to bescanned face down on the scanner glass.• There may not be enough available memoryto hold the document you want to scan. Trythe prescan function to see if that works. Trylowering the scan resolution rate.• Check that the USB cable is connectedproperly.• Make sure that the USB cable is notdefective. Switch the cable with a knowngood cable. If necessary, replace the cable.The unit scansvery slowly. • Check if the machine is printing receiveddata. If so, scan the document after thereceived data has been printed.• Graphics are scanned more slowly than text.• Communication speed slows in scan modebecause of the large amount of memoryrequired to analyze and reproduce thescanned image. Set your computer to theECP printer mode through BIOS setting. Itwill help to increase the speed. For detailsabout how to set BIOS, refer to yourcomputer user’s guide.Message appearson your computerscreen:• “Device can't beset to the H/Wmode you want.”• “Port is beingused by anotherprogram.”• “Port isDisabled.• “Scanner is busyreceiving orprinting data.When thecurrent job iscompleted, tryagain.”• “Invalid handle.”• “Scanning hasfailed.”• There may be a copying or printing job inprogress. When that job is complete, try yourjob again.• The Selected port is currently being used.Restart your computer and try again.• The printer cable may be improperlyconnected or the power may be off.• The scanner driver is not installed or theoperating environment is not set up properly.• Ensure that the machine is properlyconnected and the power is on, Then restartyour computer.• The USB cable may be improperlyconnected or the power may be off.