HP 2100 Service Manual - Page 123

Hint If a defect is not depicted, record the probable cause along with the conditions in the printing environment and save a copy of the defect for future reference. Black Lines (vertical) Possible Cause Action Defective Toner Cartridge. Inspect the Toner Cartridge for a scratched photosensitive drum or toner leaking through worn seals. Replace the Cartridge as necessary. Fuser is contaminated Inspect the Fuser for toner build-up or scratches on or damaged. the fuser rollers. Try cleaning with alcohol. Replace the Fuser if damaged. Broken lens in scanner. Replace laser scanner. Black Page Possible Cause Action Poor contact between Inspect the contacts. If the parts are deformed or the primary bias damaged, replace them. contact on the Engine Controller Assembly and the cartridge. Defective Toner Cartridge. Replace the Toner Cartridge. Engine Controller Replace the Engine Controller Assembly and the Assembly is defective. Intermediate PCB. If the Engine Controller turns on the laser beam continuously, the entire surface of the Photosensitive drum is neutralized causing a completely black page. Blank Page Possible Cause Action Software Configuration. Make sure the application is not sending incorrect page length requests, or extra page eject commands. Print a self-test/configuration page to verify configuration. Multiple Feeds. The Remove the paper from the paper cassette and printer may be feeding break the ream (do not fan the pages). See "Media two or more pages at Troubleshooting" (page 129)). once because the paper is difficult to separate. C4170-90959 Image Formation Troubleshooting 113