Samsung CLP-680ND User Manual page 244

Printing quality problems
Condition
Loose toner
Character voids
A
Horizontal stripes
• Clean the inside of the machine (see "Cleaning the machine" on page 74).
• Check the paper type, thickness, and quality.
• Remove the toner cartridge and then, install a new one (see "Replacing the toner cartridge" on page 62).
If the problem persists, the machine may require repair. Contact a service representative.
Character voids are white areas within parts of characters that should be solid black:
• You may be printing on the wrong surface of the paper. Remove the paper and turn it around.
• The paper may not meet paper specifications.
If horizontally aligned black streaks or smears appear:
• The toner cartridge may be installed improperly. Remove the cartridge and reinsert it.
• The toner cartridge may be defective. Remove the toner cartridge and install a new one (see "Replacing the toner cartridge" on
page 62).
If the problem persists, the machine may require repairing. Contact a service representative.
Suggested solutions
245
6. Troubleshooting