Xerox 3300MFP Service Manual - Page 113

General Troubleshooting Defect White/Black spots Symptom Cause & Check Solution ■ Light or dark black dots on the image occur periodically. ■ White spots occur in the image periodically. 1. If light or dark periodical black dots occur, this is because the print cartridge rollers are contaminated with foreign substance or paper particles. (1) 37.7 mm interval: Charged roller (2) 75.5 mm interval: OPC cycle 1. In case of 1 above: Run OPC Cleaning Mode Print 4-5 times repeatedly to remove. Remove any foreign substance on the OPC surface with a clean gauze moistened with water to avoid unnecessary damage to OPC. Never use usual alcohol. 2. If white spots occur in a black image at intervals of 75 mm, or black spots occur elsewhere, the OPC drum is damaged or foreign substance is stuck to the surface. 2. If spots remain after running OPC Cleaning Mode Print 4-5 times. : at intervals of 37.7 mm -Replace the print cartridge. : at intervals of 75.5 mm -Remove foreign substance. : Broken image Replace the print cartridge according to carelessness. 3. If a black and white or graphic image is partially broken at irregular intervals, the transfer roller is at endof-life or the transfer voltage is abnormal. 3. Replace the transfer roller because the life of the transfer roller in use has expired. (Check the transfer voltage and readjust if different.) Phaser 3300MFP Service Manual 4-21