Lexmark MX431 Users Guide PDF - Page 170
Mottled print and dots, Step 5, Warning-Potential Damage, Settings, Reports, Device, Device Statistics
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Troubleshoot a problem 170 Action Yes Step 5 a Remove the imaging unit. Go to step 6. 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 Firmly shake the imaging unit to redistribute the toner. c Insert the imaging unit. d Turn off the printer, wait for 10 seconds, and then turn on the printer. e Print the document. No The problem is solved. Is the print light? Step 6 a Check the status of the toner cartridge. From the control panel, navigate to: Settings > Reports > Device > Device Statistics b From the Supply Information section of the pages printed, check the status of the toner cartridge. Go to step 7. Contact customer support. Is the toner cartridge near end of life? Step 7 a Replace the toner cartridge. b Print the document. Contact customer The problem is support. solved. Is the print light? Mottled print and dots 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.