Lexmark C520 Service Manual - Page 73

5022-xxx Print quality-blurred or fuzzy print Blurred or fuzzy print is usually caused by a problem in the EP drive assembly or in the transfer belt assembly. Check the EP drive assembly and transfer belt assembly for correct operation. Blurred print can also be caused by incorrect feeding from one of the input paper sources, paper trays, or duplex paper path. Check the high voltage spring contacts to ensure they are not bent, corroded, or damaged. Replace as necessary. Print quality-half-color page A photoconductor unit is not properly seated. Reset the specific photoconductor unit. Print quality-horizontal banding Step Questions / actions 1 Measure the distance between repeating bands. Is the distance between bands either 27 or 36mm? Yes Replace the print cartridge. No Replace the photoconductor unit. See "Photoconductor unit removal" on page 4-70. Print quality-horizontal line The photoconductor unit is defective. Replace the photoconductor unit. Print quality-insufficient fusing Step Questions / actions 1 Is the fuser properly installed? 2 Replace the fuser. See "Fuser removal" on page 4-60. Does this fix the problem? Yes Go to step 2. Problem solved. No Install the fuser properly. Replace the LVPS. see "Low voltage power supply (LVPS) removal" on page 4-65. Print quality-missing image at edge Reseat the developer cartridge. Print quality-mottle (2-5mm speckles) Keep running prints through, and the problem normally clears up. If the problem persists, replace the developer cartridge. Print quality-narrow vertical line Step Questions / actions 1 Replace the photoconductor unit. See "Photoconductor unit removal" on page 4-70. Yes Problem solved. No Replace the print cartridge. 2-58 Service Manual