Lexmark MX421 Users Guide PDF - Page 206
Vertical dark bands, Step 1, Notes
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Troubleshooting 206 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. Does the toner easily rub off? Step 2 Contact customer a Depending on your operating system, specify the paper type support. from the Printing Preferences or Print dialog. Notes: • Make sure that the setting matches the paper loaded. • You can also change the setting on the printer control panel. b Print the document. The problem is solved. Does the toner easily rub off? Vertical dark bands 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 bands appear on prints?