Operation Manual

Troubleshooting > 76
When the error message “UNKNOWN CONSUMABLE” is displayed, you can use any
consumables in your product, but you must accept the risks of using non-genuine
consumables. If the use of non-genuine consumables causes damage to the product or
results in your product not functioning to its full specification, then such damage or effect
on the product is not covered by warranty. To accept these risks and to restore function;
1. Turn off your product.
2. Press and hold the CANCEL but
ton and turn your product on.
3. After start up, release the CANCEL bu
tton.
Horizontal Lines and
spots appear
periodically.
When the interval is about
94
mm (4in), the image drum
(the green tube) is damaged
or dirty.
Wipe it lightly with a soft cloth.
R
eplace the image drum
cartridge when it is damaged.
When the interval is about
30mm
(1.2in), there may be
foreign particles in the image
drum cartridge.
Open/close output tray, and print
ag
ain.
When the interval is about
86mm
(3.4in), the fuser unit
is damaged.
Replace the fuser unit.
The image drum cartridge
h
as been
exposed to light.
Replace the image drum
cartridge if the problem is not
resolved.
White area of paper is
li
ght
ly stained.
Paper contains static. Use paper stored in proper
temperature and humidity
conditions.
Too thick paper is used. Use thinner paper.
The toner is low. Open output tray and tap the
ca
rtri
dge a few times to evenly
distribute any remaining toner. If
symptoms persist, replace the
toner cartridge.
Periphery of the letters
is
smu
dged.
The LED head is dirty. Wipe the LED head with a soft,
lint-free cloth.
Toner comes off when
it
is r
ubbed.
The thickness and type of the
paper are incorrectly set.
Set the correct value of media
type and media weight in the
Media menu or set one value
lighter for media weight.
Recycled paper is used. Set one value thicker for media
we
ight in
the Media menu.
Glossiness is not
un
ifor
m.
The thickness and type of the
paper are incorrectly set.
Set the correct value of media
type and media weight in the
Media menu or set one value
lighter for media weight.
NOTE
This operation will be recorded for future reference.
SYMPTOMS POSSIBLE CAUSES STEPS TO TAKE