Konica Minolta BIZHUB 190F User Manual page 210

16
Problem
Printouts are of uneven
density
B
A
A B
B
A
A B
A B
Printouts have irregulari-
ties
ABCDE
ABCDE
ABCDE
ABCDE
ABCDE
Printouts have white and/
or black lines
ABCDE
ABCDE
ABCDE
ABCDE
ABCDE
Printouts have toner
smudges
ABCDE
ABCDE
ABCDE
ABCDE
ABCDE
16-32
Possible cause
• The toner may be unevenly distributed inside the toner car-
tridge. Remove the toner cartridge and shake it a few times to
redistribute the toner inside.
• The drum cartridge may be defective. Remove the drum car-
CDE CDE
tridge and check it for damage. If the problem persists, replace
CDE CDE
the drum cartridge.
CDE CDE
CDE CDE
CDE CDE
The paper you are using may have absorbed moisture, perhaps
due either to high humidity or water having been spilled on the pa-
per supply. Toner will not adhere well to wet paper.
Replace the paper with dry paper.
• The ADF glass or rollers of the ADF may be dirty.
• Clean the ADF glass and/or the rollers of the ADF. (See
page 16-3.)
• The drum charge wire may be dirty. Open the front cover, then
gently pull and push back the blue rod to clean the drum charge
wire. (See page 16-5.)
• The toner cartridge or drum cartridge may be defective. Re-
move the cartridges and check them for damage. If the problem
persists, replace either or both of the cartridges as indicated.
• The drum charge wire may be dirty. Open the front cover. To
clean the drum charge wire, pull the blue rod toward you, mak-
ing sure it fully extends. Then return the rod to its original posi-
tion. See page 16-5.
• The document glass is dirty.
Wipe the document glass with a dry soft cloth.
• The document pad is dirty.
Clean the document pad with a soft cloth dampened with a mild
detergent.
• The toner cartridge or drum cartridge may be defective. Re-
move the cartridges and check them for damage. If the problem
persists, replace either or both of the cartridges as indicated.
• If you find smudges on the back of the printouts, the transport
roller may be dirty. Your machine normally cleans the transport
roller automatically. If other solutions fail, please contact your
local technical representative.
• The drum charge wire may be dirty. Open the front cover. To
clean the drum charge wire, pull the blue rod toward you, mak-
ing sure it fully extends. Then return the rod to its original posi-
tion. See page 16-5.
Maintenance and Troubleshooting
bizhub 131f/190f