Hello, and thank you for choosing JA for your support needs. Happy to assist you with this issue.
To answer your question you need to clean the FAX to improve the quality of the print outs. Please see below:
Please clean both the Laser Scanner Window and the Corona Wire inside the drum unit. Follow the steps listed below:
To clean the Laser Scanner Window
Unplug the telephone line and then the power cord.When you reconnect these lines later, connect the power cord first, then the telephone line.
Lift the control panel cover.
Clean the white bar and glass cover under the white bar. Moisten a small, clean, soft, lint-free cloth with isopropyl alcohol and carefully remove dirt from the glass cover and the white bar.
To clean the primary corona wire inside the drum unit