Samsung SCX-5639FR-XAA - Manual (Page 317)

Printing quality problems
157 6. Troubleshooting
Wrinkles or creases • Ensure that the paper is loaded properly.
• Check the paper type and quality.
• Turn the stack of paper over in the tray. Also try rotating the paper 180° in the tray.
Back of printouts are dirty • Check for leaking toner. Clean the inside of the machine.
Solid color or black pages • The toner cartridge may not be installed properly. Remove the cartridge and reinsert it.
• The toner cartridge may be defective. Remove the toner cartridge and install a new one.
• The machine may require repairing. Contact a service representative.
Condition Suggested solutions
A