7 Close the Top Cover.The contrast becomes uneven during printingThe contrast becomes uneven during printingCause Corrective ActionThe paper feed amount is out of adjustment. Adjust the feed amount.(See "Adjusting the Feed Amount.") ➔ P.558The type of paper specified in the printer driv-er does not match the type loaded in theprinter.Load paper of the same type as you have specified in the printer driver.(See "Loading Rolls in the Printer.") ➔ P.345(See "Loading Sheets in the Printer.") ➔ P.369Make sure the same type of paper is specified in the printer driver as you have loa-ded in the printer.1. Press the Stop button and stop printing.2. Change the type of paper in the printer driver and try printing again.The length of printed images is inaccurate in the feeding directionThe length of printed images is inaccurate in the feeding directionCause Corrective ActionIn the Control Panel menu, Adj. Priority isset to Print Quality.Set Adj. Priority to Print Length in the Control Panel menu, and then execute AdjustLength.(See "Adjusting the Feed Amount.") ➔ P.558The type of paper specified in the printerdriver does not match the type loaded inthe printer.Load paper of the same type as you have specified in the printer driver.(See "Loading Rolls in the Printer.") ➔ P.345(See "Loading Sheets in the Printer.") ➔ P.369Make sure the same type of paper is specified in the printer driver as you have loadedin the printer.1. Press the Stop button and stop printing.2. Change the type of paper in the printer driver and try printing again.Images are printed crookedImages are printed crookedCause Corrective ActionIn the Control Panel menu, Skew Check Lv. is set to Loose or Off. In the Control Panel menu, set Skew Check Lv. to Standard.In the Control Panel menu, Width Detection is set to Off. Set Width Detection to On in the Control Panel menu.Documents are printed in monochromeDocuments are printed in monochromeCause Corrective ActionIn the Advanced Settings of the printer driver, Mon-ochrome, Monochrome (BK ink), or MonochromeBitmap is specified in Color Mode.In the Advanced Settings of the printer driver, specify Color in Color Modeand try printing again.The Printhead nozzles are clogged. Print a test pattern to check the color ink nozzles and see if they are clogged.(See "Checking for Nozzle Clogging.") ➔ P.577The contrast becomes uneven during printing iPF840User's GuideTroubleshooting Problems with the printing quality624
