Samsung ML 2950ND User Manual

Printing quality problems1116. Troubleshooting
Toner specks• The paper may not meet specifications; for example, the paper may be too moist or rough.
• The transfer roller may be dirty. Clean the inside of your machine.
• The paper path may need cleaning. Contact a service representative.
DropoutsIf faded areas, generally rounded, occur randomly on the page:
• A single sheet of paper may be defective. Try reprinting the job.
• The moisture content of the paper is uneven or the paper has moist spots on...

Printing quality problems1126. Troubleshooting
Vertical linesIf black vertical streaks appear on the page:
• The surface (drum part) of the toner cartridge inside the machine has probably been scratched. Remove the 
toner cartridge and install a new one.
If white vertical streaks appear on the page:
• The surface of the LSU part inside the machine may be dirty. Clean the inside of your machine. If these steps do 
not correct the problem, contact a service representative.
Black backgroundIf the amount of...

Printing quality problems1136. Troubleshooting
Vertical repetitive defectsIf marks repeatedly appear on the printed side of the page at even intervals:
• The toner cartridge may be damaged. If you still have the same problem, remove the toner cartridge and, install 
a new one.
• Parts of the machine may have toner on them. If the defects occur on the back of the page, the problem will 
likely correct itself after a few more pages.
• The fusing assembly may be damaged. Contact a service representative....

Printing quality problems1146. Troubleshooting
Toner particles are around 
bold characters or picturesThe toner might not adhere properly to this type of paper.
• Change the printer option and try again. Go to Printing Preferences, click the Paper tab, and set the paper type 
to Recycled. Ensure the correct paper type is selected. For example: If Thicker Paper is selected, but Plain 
Paper actually used, an overcharging can occur causing this copy quality problem.
Misformed characters• If characters are...

Printing quality problems1156. Troubleshooting
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.
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...

Printing quality problems1166. Troubleshooting
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.
Loose toner• Clean the inside of the machine.
• Check the paper type and quality.
• Remove the toner cartridge and then, install a new one.
If the problem persists, the machine may...

Printing quality problems1176. Troubleshooting
 
Horizontal stripesIf 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.
If the problem persists, the machine may require repairing. Contact a service representative.
CurlIf the printed paper is curled or paper does not feed into the machine:
• Turn the stack of paper over in the...

1186. TroubleshootingOperating system problems
1 
Common Windows problems
 
 
 
Refer to the Microsoft Windows 2000/XP/2003/Vista User’s Guide that came with your computer for further information on Windows 
error messages.
 
ConditionSuggested solutions
“File in Use” message 
appears during 
installation.Exit all software applications. Remove all software from the startup group, then restart Windows. Reinstall the 
printer driver.
“General Protection 
Fault”, “Exception OE”, 
“Spool 32”, or “Illegal...

Operating system problems1196. Troubleshooting
2 
Common Macintosh problems
 
 
 
Refer to the Macintosh User’s Guide that came with your computer for further information on Macintosh error messages.
 
ConditionSuggested solutions
The machine does not print PDF 
files correctly. Some parts of 
graphics, text, or illustrations are 
missing.Printing the PDF file as an image may enable the file to print. Turn on Print As Image from the Acrobat 
printing options. 
 
It will take longer to print when you...

Operating system problems1206. Troubleshooting
3 
Common Linux problems
 
 
ConditionSuggested solutions
The machine does not 
print.• Check if the printer driver is installed in your system. Open Unified Driver Configurator and switch to the 
Printers tab in the Printers configuration window to look at the list of available machines. Make sure that 
your machine is displayed on the list. If not, open Add new printer wizard to set up your device.
• Check if the machine is started. Open Printers...