Lexmark Optra C Service Manual - Page 88

5045-001 Laser Failures Symptom: Jagged test and edges or very fine horizontal lines the entire width of the page. These may occur as blank lines (voids) or as any color. Vertical print may be wavy (see following example). Cause: Contaminated (toner) beam detect mirror, or beam detect lens in the printhead, causes the laser to loose sync or power aberration. Resolution: Disassemble the printhead and clean the beam detect lens inside the printhead. Also clean the small (10 mm X 10 mm) beam detect mirror, or replace the printhead. Low Color Coverage or Usage Note: The following is not a machine condition. Symptom: Vertical streaks on the page. See "Vertical Streaks" on page 2-59, for more information. Cause: Extended printing using minimal color coverage. The internal mechanisms in the cartridge wear out before the level of toner is depleted. Resolution: Replace the cartridge. 2-56