4F2C-01L

Streaks Appear/Printing Is Uneven

A possible cause may be that appropriate paper is not used or the amount remaining in toner cartridges is running low. Check the following.

Are you using appropriate paper?

Check usable paper, and replace with appropriate paper.

Have you cleaned the fixing unit?

Clean the fixing unit.

Is the machine installed in an environment where the temperature changes rapidly and drastically?

When the temperature changes rapidly in the environment where the machine is installed, condensation occurs, which may cause fading or bleeding in images and text. If <Control Condensation> is set to <On>, condensation inside the machine will be removed. Condensation removal may be performed automatically due to temperature change.

IMPORTANT

While condensation removal is being performed, printing may not be performed properly and blank paper may be output.

If you set to <On>, you need to keep the machine turned ON to maintain the effect of condensation removal.

If you set to <On>, the setting of Auto Shutdown is disabled.

Are you using the machine in an environment with high humidity?

Change the setting for <High Humidity Mode>. Setting this item to <On> may solve the problem.

NOTE

If you set to <On> and use the machine in an environment with low humidity, printed images and text may be blurry.

Is the print faded or uneven in density depending on the paper type or the environmental conditions?

Change the setting for <Reduce Toner Flaking>. Changing the mode setting may solve the problem.

NOTE

LBP664Cdw

The improvement effect is stronger with <Mode 2> than <Mode 1>. First try with <Mode 1>.

Setting a greater improvement effect may result in curled printouts or slower printing speed.

LBP623Cdw / LBP622Cdw

If you set to <On>, ghost images may appear in blank areas.

Are you using paper containing much paper dust? (LBP664Cdw)

Using paper containing much paper dust may result in a faded or streaky printout. Setting <Corr. Img. Corrup. by Ppr. Dust>/<Correct Image Corrupted by Paper Dust> to <On> may solve the problem.

NOTE

If you set to <On>, the printing speed may be slower.

Is color mismatch correction or color tone correction proper?

Change the setting for <Correct Color Mismatch>. Setting this item to <On> may solve the problem.

NOTE

If you set to <On>, the printing speed may be slower.

Change the setting for <Reduce Drum Streak>. Setting this item to <On> may solve the problem.

Is the amount remaining in toner cartridge running low?

Check how much the amount remaining in toner cartridges is left, and replace the toner cartridges as necessary.

Regardless of the displayed toner level, the toner cartridge may have reached the end of its lifetime due to the machine's environmental conditions and the deteriorated materials in the cartridge. Replace the toner cartridge.