Examples of poor print

Recommendation

quality

 

 

 

 

 

„ Make sure that you use paper that meets our specifications. (See

 

 

 

 

Acceptable paper and other media on page 11.)

 

 

 

 

„ Choose Thick paper mode in the printer driver or in the machine’s Paper

 

 

 

 

Type menu setting, or use thinner paper than you are currently using. (See

 

 

 

 

Paper Type on page 17 and Basic tab in the Software User’s Guide on the

 

 

 

 

CD-ROM.)

Hollow print

„ Check the machine’s environment. Conditions such as high humidity can

 

 

 

 

cause hollow print. (See Choosing a location on page 38.)

 

 

 

 

„ Clean the primary corona wire on the drum unit. (See Cleaning the corona

 

 

 

 

wire on page 71.) If the print quality has not improved, put in a new drum unit.

 

 

 

 

(See Replacing the drum unit (DR-520)on page 76.)

 

 

 

 

 

 

 

 

 

„ Clean the primary corona wire on the drum unit. (See Cleaning the corona

 

 

 

 

wire on page 71.) If the print quality has not improved, put in a new drum unit.

 

 

 

 

(See Replacing the drum unit (DR-520)on page 76.)

 

 

 

 

„ The drum unit may be damaged. Put in a new drum unit. (See Replacing the

 

 

 

 

drum unit (DR-520)on page 76.)

All black

 

 

 

 

 

 

 

 

 

 

Dust, paper powder, glue, and so on may stick to the surface of the photosensitive

 

 

 

 

drum (OPC) and cause black or white spots to appear on printed documents.

 

 

 

 

Make a few copies of a blank, white sheet of paper.

 

 

 

 

 

 

 

 

If you still see the spots on printed documents after making multiple copies, clean

 

 

 

 

 

 

 

 

the drum unit (see Cleaning the drum unit on page 72).

 

 

 

 

If the print quality still has not improved you need to install a new drum. (See

 

 

 

 

White Spots on black text

Replacing the drum unit (DR-520)on page 76.)

 

and graphics at 3.7 in. (94

 

mm) intervals

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Black Spots at 3.7 in. (94 mm)

intervals

„Make sure that you use paper that meets our specifications. (See

Acceptable paper and other media on page 11.)

ABCDEFGH

 

„ If you use label sheets for laser printers, the glue from the sheets may

 

abcdefghijk

A B C D

sometimes stick to the OPC drum surface. Clean the drum unit. (See

 

 

a b c d e

Cleaning the drum unit on page 72.)

0 1 2 3 4

 

„Do not use paper that has clips or staples because they will scratch the

Black toner marks across the

surface of the drum.

„ If the unpacked drum unit is in direct sunlight or room light, the unit may be

page

 

damaged.

 

„ The drum unit may be damaged. Put in a new drum unit. (See Replacing the

 

drum unit (DR-520)on page 76.)

56