Oki B720dn User Manual page 37

If the print quality does not improve after carrying out the appropriate action, contact
service.
SYMPTOM
Printing is
light.
(faded,
blurred).
Black spots or
streaks are
printed.
Dirt appears at
equal
intervals.
White dots
appear in
black filled
areas.
Printed image
smudges when
rubbed with
your finger.
The toner is
not fixed on
the paper.
Paper is
smeared with
toner.
REASON/ACTION
The paper is damp. Replace with paper from a new
ream.
"Loading Paper" on page 27.
The drum/toner cartridge is defective/damaged or
there is no more toner inside the cartridge. Replace
with a new drum/toner cartridge.
"Drum/Toner Cartridge Replacement" on page 39.
The Toner Saving feature is on. Uncheck the Toner
Saving checkbox on the Graphics tab of the printer
driver.
Online Help for the printer driver
Levers on both sides of the fuser unit are raised. Open
cover B of this printer and push down the levers at
both ends of the fuser unit.
The drum/toner cartridge is defective or damaged.
Replace with a new drum/toner cartridge.
"Drum/Toner Cartridge Replacement" on page 39.
The feed route of the paper is stained. Print a few
pages to remove the stains.
The drum/toner cartridge is defective or damaged.
Replace with a new drum/toner cartridge.
"Drum/Toner Cartridge Replacement" on page 39.
The paper used is not suitable. Load the correct type
of paper.
See "Usable Paper" in the Reference Guide.
The drum/toner cartridge is defective or damaged.
Replace with a new drum/toner cartridge.
"Drum/Toner Cartridge Replacement" on page 39.
The paper loaded in the paper tray does not match
the paper type set on the control panel. Set the
appropriate paper type of the paper loaded in the
paper tray on the control panel.
See "Usable Paper" and "Setting Paper Types" in the
Reference Guide.
The paper is damp. Replace with paper from a new
ream.
The paper used is not suitable. Load the correct type
of paper.
See "Usable Paper" in the Reference guide.
Troubleshooting > 37