Lexmark M1246 Users Guide PDF - Page 120
Vertical dark lines or streaks, Step 4, Warning-Potential Damage
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Troubleshooting 120 Action Step 4 a Check if a bright light enters the right side of the printer, and move the printer if necessary. b Print the document. Yes Contact customer support. No The problem is solved. Do vertical dark bands appear on prints? Vertical dark lines or streaks Note: Before solving the problem, print the Print Quality Test Pages. From the control panel, navigate to Settings > Troubleshooting > Print Quality Test Pages. For non‑touch‑screen printer models, press to navigate through the settings. Action Yes Step 1 Go to step 2. a Check if the printer is using a genuine and supported Lexmark toner cartridge. Note: If the toner cartridge is not supported, then install a supported one. b Print the document. No The problem is solved. Do vertical dark lines or streaks appear on prints? Step 2 Go to step 3. a Remove, and then reinstall the imaging unit. Warning-Potential Damage: Do not expose the imaging unit to direct light for more than 10 minutes. Extended exposure to light can cause print quality problems. Warning-Potential Damage: Do not touch the photoconductor drum under the imaging unit. Doing so may affect the quality of future print jobs. b Print the document. The problem is solved. Do vertical dark lines or streaks appear on prints?