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Samsung ML 2950ND User Manual

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Page 200 1106. TroubleshootingPrinting quality problems
If the inside of the machine is dirty or paper has been loaded improperly, there might be a reduction in print quality. See the table below to
clear the problem.

ConditionSuggested Solutions
Light or faded print• If a vertical white streak or faded area appears on the page, the toner supply is low. Install a new toner cartridge.
• The paper may not meet paper specifications; for example, the paper may be too moist or rough.
• If the entire page is light,...

Page 201 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...

Page 202 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...

Page 203 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....

Page 204 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...

Page 205 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...

Page 206 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...

Page 207 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...

Page 208 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...

Page 209 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...

Page 210 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...

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