Samsung ML-4512ND-XAA - Manual (Page 249)

Printing quality problems
123 6. Troubleshooting
Curl If the printed paper is curled or paper does not feed into the machine:
• Turn the stack of paper over in the tray. Also try rotating the paper 180° in the tray and/or replace with fresh
paper.
• Change the printer’s paper option and try again. Go to Printing Preferences, click the Paper tab, and set type
to Thin.
• An unknown image
repetitively appears on
a few sheets
• Loose toner
• Light print or
contamination occurs
Your machine is probably being used at an altitude of 1,000 m (3,281 ft) or above.
The high altitude may affect the print quality, such as loose toner or light imaging. Change the altitude setting for
your machine (See "Altitude adjustment" on page 72).
Condition Suggested Solutions