Lexmark C750 Service Manual - Page 179

5060-00x Residual image • If only one color has a residual image repeated every 95mm, replace the print cartridge. • If all colors have a residual image 147 mm from the top of the page, replace the fuser assembly. Note: Do the following steps before you replace the fuser assembly: 1. Check Media Type setting on the operator panel. If the setting is for light paper, select the correct setting for the current media type. 2. If the problem continues, set the fuser temperature selection to High. 3. If the problem continues, check the page count. If the page count is greater than 200K copies and the fuser has not been replaced, advise the customer to install a new fuser CRU or a maintenance kit. If only one color has a residual image problem, go to "Horizontal lines or streaks" on page 2-137. Uneven printing • If all colors have uneven print, replace the ITU assembly. • The uneven print may appear as spots or streaks that are different on each page. The most likely cause for • this type of problem is damage to the ITU belt in the ITU assembly. Replace the ITU assembly. See "ITU assembly removal" on page 4-37. If only one color is missing or printing uneven, go to step 1. Action and questions Print cartridge - Make sure the cartridge is seated properly and that all packing material has been removed from the cartridge. Has all packing material been removed? Is the cartridge seated correctly? 2 Cartridge check - the cartridge may be out of toner or have another toner problem. Try a new toner cartridge. Does a new toner cartridge fix the problem? Problem solved Call your next level support Yes Problem solved No Go to step 2 Step 1 Toner smears or rubs off the page with no error code displayed Note: This type of problem is associated with improper fusing or incorrect settings for media type being used. Step 1 Action and questions Media settings - Check to see if the printer is set for light paper. Is the printer set for light paper? 2 3 Does resetting the media type fix the problem? Fuser settings - Set the fuser to High in the CE menu. Does setting the fuser to High fix the problem? Yes Set the printer for current media type and go to step 2 Problem solved Problem solved No Go to step 3 Go to step 3 Replace the fuser assembly. See "Fuser assembly removal" on page 4-31 Diagnostic information 2-145