1) Color Has Faded-Out And Blurred Entirely; Color Has Faded-Out And Blurred Entirely. (Refer To Figure 6-2 A.); Color Are Faded-Out And Blurred - Oki B721 Maintenance Manual

Oki Data CONFIDENTIAL
6.5.3.(1)

Color has faded-out and blurred entirely. (Refer to Figure 6-2 A.)

(1-1)

Color are faded-out and blurred.

Check item
(1-1-1) Toner
Remaining amount Check if the message "Prepare toner
of toner replacement." or "Replace the toner." appears
or not.
Tape attached to Check to see that the tape attached to the
the toner cartridge toner cartridge opening slot has been peeled
opening slot off.
(1-1-2) LED head
Lens of the LED Check if surface of the lens of the LED head
head is stained or not by toner and paper dust.
Mounting condition Check that the LED head is mounted on the
of LED head LED head holder correctly. Check that the
right and left tension springs are normally
installed.
(1-1-3) Print media
Media type Check to see that the print media which is
used for printing is not a specially thick media
(1-1-4) High voltage terminal
ID unit terminal ICheck that the high voltage terminal of the ID
unit is contacting with the Contact Assembly
normally by visual inspection. (Refer to Figure
6-3.)
45487001TH Rev.1
Actions to be taken
Check work
at NG
Replace toner
cartridge with
new one.
Move the toner
cartridge lever to
CLOSE position
and remove tape
from opening
slot.
Clean the lens
with soft tissue
paper.
Correct
for normal
condition.
Use the normal
paper.
IReplace the ID
unit or correct
the high voltage
terminal.
If any attempt
of using new ID
unit as a trial
is going to be
made, be sure to
use the System
Maintenance
Menu FUSE
KEEP MODE.
Check item
(1-1-5) ID unit installation condition
ID unit DOWN Move the ID unit in and out with hand to
position (Defective confirm that any abnormal mechanical load
transfer) does not exist, and the ID unit can be moved
down to the DOWN position normally. If a
piece of paper is inserted in between drum
and belt, if top end of the paper can enter
easily, it is NG (No Good).
6. Troubleshooting procedure
Actions to be taken
Check work
at NG
Check the
U-shaped
groove of the
side plate for
any abnormality.
If repair is found
impossible,
replace the
equipment.
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