Improving The Print Quality - Konica Minolta bizhub 20 User Manual

Improving the print quality

Examples of poor print
quality
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
White lines across the page
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
White lines down the page
Hollow print
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
Gray background
Recommendation
 Make sure that you use paper that meets our specifications. A rough
surfaced paper or thick print media can cause the problem. (See
Acceptable paper and other print media on page 12.)
 Make sure that you choose the appropriate media type in the printer
driver or in the machine
paper and other print media on page 12 and Basic tab in the Software
User's Guide on the CD/DVD-ROM.)
The problem may disappear by itself. Print multiple pages to clear this

problem, especially if the machine has not been used for a long time.
 The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 145.)
 Wipe the laser scanner windows with a dry, lint-free soft cloth. (See
Cleaning the laser scanner window on page 138.)
 Make sure that a torn sheet of paper is not inside the machine
covering the scanner window.
 The toner cartridge may be damaged. Put in a new toner cartridge.
(See Replacing a toner cartridge on page 143.)
 The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 145.)
 Make sure that you use paper that meets our specifications. (See
Acceptable paper and other print media on page 12.)
 Choose Thick paper mode in the printer driver, choose Thick in the
'
machine s Paper Type menu setting or use thinner paper than you
are currently using. (See Paper Type on page 19 and Basic tab in the
Software User's Guide on the CD/DVD-ROM.)
'
 Check the machine s environment. Conditions such as high humidity
can cause hollow print. (See Choosing a location on page 92.)
 The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 145.)
 Make sure that you use paper that meets our specifications. (See
Acceptable paper and other print media on page 12.)
'
 Check the machine s environment. Conditions such as high
temperatures and high humidity can increase the amount of
background shading. (See Choosing a location on page 92.)
 The toner cartridge may be damaged. Put in a new toner cartridge.
(See Replacing a toner cartridge on page 143.)
 The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 145.)
Troubleshooting and routine maintenance
'
s Paper Type menu setting. (See Acceptable
C
C
117