Xerox 3450B Service Manual - Page 90

Image Defect Possible Cause Black Spots/Marks: ■ Print Cartridge There are spots and/or ■ Fuser assembly marks of toner on the ■ Paper transports printed side of the page. ■ Transfer Roller Solution ■ Replace the Print Cartridge. NOTE: Refer to "Defects Associated with Specific Printer Components" on page 5-2 for defect pitch. ■ Inspect /clean/replace Fuser assembly as necessary. ■ Clean contamination from paper transports and exit rollers. ■ Clean /replace Transfer Roller Spot or Vertical ■ Damp paper Deletions: Solid areas ■ Foreign matter are marked with irregular contamination of white spots. printer components. ■ Print Cartridge ■ Transfer Roller ■ Replace paper. ■ Check printer components for surface contamination or paper scraps. Clean as required. ■ If deletions repeat every 95 mm, replace Print Cartridge. NOTE: Refer to "Defects Associated with Specific Printer Components" on page 5-2 for defect pitch. ■ Remove the Transfer Roller and clean (dust off). If deletions repeat every 57 mm, replace Transfer Roller. Horizontal Bands: Dark ■ Print Cartridge bands appearing in the ■ Fuser Assembly horizontal direction. ■ Transfer Roller ■ Incorrect high voltage outputs. ■ Laser Assembly ■ Replace the Print Cartridge. ■ Inspect /clean/replace Fuser Assembly as necessary. ■ Inspect the Transfer Roller spring tension and bearing contacts. ■ Replace Power Supply Board. ■ Replace Laser Assembly. Character Defects: ■ Loose/defective ■ Inspect cable connections; verify Garbled print, missing, interface cables; cable that cables meet specified repeating or scrambled not within specification. characters are problems ■ Optional DIMM relating to font data or memory requirements. ■ Replace optional DIMM memory. ■ Replace Main Board. character generation. ■ Main Board Print-Quality Troubleshooting 5-9