OKI C821 Manual De Usuario

Troubleshooting > 100

Horizontal Lines and 
spots appear 
periodically.

When the interval is about 
94mm (4in), the image drum 
(the green tube) is damaged 
or dirty.

Wipe it lightly with a soft cloth. 
Replace the image drum 
cartridge when it is damaged.

When the interval is about 
30mm (1.2in), there may be 
foreign particles in the image 
drum cartridge.

Open/close the top cover, and 
print again.

When the interval is about 
86mm (3.4in), the fuser unit 
is damaged.

Replace the fuser unit.

The image drum cartridge 
has been exposed to light.

Replace the image drum 
cartridge if the problem is not 
resolved.

White area of paper is 
lightly stained.

Paper contains static.

Use paper stored in proper 
temperature and humidity 
conditions.

Too thick paper is used.

Use thinner paper.

The toner is low.

Open the top cover and tap the 
cartridge a few times to evenly 
distribute any remaining toner. If 
symptoms persist, replace the 
toner cartridge.

Periphery of the letters 
is smudged.

The LED head is dirty.

Wipe the LED head with a soft, 
lint-free cloth.

Toner comes off when 
it is rubbed.

The thickness and type of the 
paper are incorrectly set.

Set the correct value of media 
type and media weight in the 
Media menu or set one value 
lighter for media weight.

Recycled paper is used.

Set one value thicker for media 
weight in the Media menu.

Glossiness is not 
uniform.

The thickness and type of the 
paper are incorrectly set.

Set the correct value of media 
type and media weight in the 
Media menu or set one value 
lighter for media weight.