Lexmark MX421 Users Guide PDF - Page 189
Dark print, Step 1, Warning-Potential Damage, Status/Supplies, Supplies
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Troubleshooting 189 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 cartridge is not supported, then install a supported one. b Print the document. No The problem is solved. Is the printer printing blank or white pages? Step 2 Go to step 3. a Remove any packing material that is left on the imaging unit. 1 Remove the toner cartridge, and then remove the imaging unit. Warning-Potential Damage: Do not expose the imaging unit to direct light for more than 10 minutes. Extended exposure to light may 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. 2 Check the imaging unit for signs of damage, and replace if necessary. Note: Make sure that the photoconductor drum contact is not bent or out of place. 3 Firmly shake the imaging unit to redistribute the toner. 4 Insert the imaging unit, and then insert the toner cartridge. b Print the document. The problem is solved. Is the printer printing blank or white pages? Step 3 Contact customer Check the status of the toner cartridge, and replace if necessary. support. a From the control panel, navigate to: Status/Supplies > Supplies b Print the document. The problem is solved. Is the printer printing blank or white pages? Dark print