Konica Minolta bizhub 20 - Manual (Page 131)

122
Black toner marks across the
page
 Make sure that you use paper that meets our specifications. (See
Acceptable paper and other print media on page 12.)
 If you use label sheets for laser machines, the glue from the sheets
may sometimes stick to the OPC drum surface. Clean the drum unit.
 Do not use paper that has clips or staples because they will scratch
the surface of the drum.
 If the unpacked drum unit is in direct sunlight or room light, the unit
may be damaged.
 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.)
Line across the page
 Clean the laser scanner window and the corona wire inside the drum
unit. (See Cleaning the laser scanner window on page 138 and
Cleaning the corona wire on page 140.)
 The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 145.)
Black lines down the page
Printed pages have toner
stains down the page
 Clean the corona wire inside the drum unit by sliding the blue tab. Be
sure to return the blue tab to the home position (
a ). (See Cleaning the
corona wire on page 140.)
 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.)
 The fuser unit may be smudged. Call your KONICA MINOLTA dealer
for service.
Examples of poor print
quality Recommendation
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4