Xerox 6140 manual Correct. For details, see Usable Paper on

Troubleshooting

Symptom	Cause	Solution
Stray black dots or white areas	The paper is outside the	Replace the paper with a recommended
(drop outs).	recommended specification	size and type, and confirm that your
	range.	control panel / printer driver settings are
		correct. For details, see Usable Paper on
		page 52.
	The transfer belt unit is old or	Replace the transfer belt unit.
	damaged.
	The toner cartridges are not	Verify that the toner cartridges meet
	Xerox toner cartridges.	specifications and replace them if
		necessary. For details, see Consumables
		on page 114.
• Vertical black or color	• The transfer belt unit is old	Verify that the toner cartridges meet
streaks or multiple colored	or damaged.	specifications and replace them if
streaks or lines.	• The toner cartridges are not	necessary. For details, see Consumables
• Streaks in only one color.	Xerox toner cartridges.	on page 114.
	There is a problem with the	Check the toner cartridge for damage
	toner cartridge for that color.	and replace if necessary.

Recurring smudges.	Dirt in the paper path.	Printer several blank sheets until the
		smudges disappear.
	The paper is outside the	Replace the paper with a recommended
	recommended specification	size and type, and confirm that your
	range.	control panel settings are correct. For
		details, see Usable Paper on page 52.
	The transfer belt unit or fuser is	Check the condition of the transfer belt
	old or damaged.	unit and the fuser and replace if
		necessary.

136Phaser 6140 Color Laser Printer User Guide