Samsung SL-M4020ND-TAA - Manual (Page 245)

Printing quality problems
245 6. Troubleshooting
Misformed characters • If characters are improperly formed and producing hollow images, the paper stock may be too slick. Try different paper.
Page skew • Ensure that the paper is loaded properly.
• Check the paper type and quality.
• Ensure that the guides are not too tight or too loose against the paper stack.
Curl or wave • Ensure that the paper is loaded properly.
• Check the paper type and quality. Both high temperature and humidity can cause paper curl.
• Turn the stack of paper over in the tray. Also try rotating the paper 180° in the tray.
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