Kyocera TASKalfa 7002i Service Manual page 931

(5-8) The entire image is too light
Step Check description
1 Reinstalling the toner con-
tainer
2 Checking the toner supply
opening
3 Measures for improving
the image quality
4 Checking the drum unit
and the developer unit
5 Checking the developer
bias contact
6 Executing U140
7 Checking the developer
unit
8 Developer unit replace-
ment
9 Checking the developer
unit
Assumed cause
Toner is collected on one
side.
The toner supply opening
does not open.
Toner is deteriorated due
to frequent low coverage
printing.
The drum unit or the devel-
oper unit is not properly
attached, and so the devel-
oper roller does not con-
tact the drum.
The developer bias contact
is deformed.
The developer bias values
that are fixed (except
"Sleeve AC" and "Mag
DC") and are not changed
according to the Calibra-
tion are changed from the
default value.
The DS pulleys are dirty.
The DS pulleys are faulty.
The toner sensor has a
fault and so toner is not
supplied.
7-71
Measures
Sufficiently shake the toner
container and reinstall it to
the main unit.
Replace the toner container.
Execute "Developer
Refresh", "Calibration" and
"Tone Curve Adjustment" in
order.
Reinstall the drum unit and
the developer unit.
Correct the developer bias
contact so that it grounds
securely.
Execute U140 and reset the
developer bias to the default
value.
Clean the DS pulleys at both
ends of the developer unit.
Replace the developer unit.
Execute Developer Refresh
when the PG image output as
test page is too light. If the
issue is not resolved, replace
the developer unit.
2WA/2NJ/2RK
Reference
Detaching
and reat-
taching the
toner con-
tainer
Detaching
and reat-
taching the
toner con-
tainer
Detaching
and reat-
taching the
drum units
/ devel-
oper unit
Executing
U140
Detaching
and Reat-
taching the
developer
unit
Detaching
and Reat-
taching the
developer
unit