Kyocera TASKalfa 7002i Service Manual page 927

(5-4) Entire black image
Step Check description
1 Checking the drum unit
and the developer unit
2 Checking the main charger
roller contact
3 Checking the developer
bias contact
4 Checking the high-voltage
contact
5 Checking the wire
6 Replacing the high-volt-
age PWB
7 LSU replacement
8 Checking the engine PWB
Assumed cause
The drum unit or the main
charger roller unit is not
properly installed.
The main charger roller
contact is dirty or
deformed.
The developer bias contact
is dirty or deformed.
The high-voltage contact of
the high-voltage PWB is
dirty or deformed.
The connectors are not
properly connected, or the
high-voltage PWB is faulty.
The high-voltage PWB is
faulty.
The APC PWB in the LSU
is faulty.
The connectors or the
FFCs on the engine PWB
are not properly con-
nected. Or the wires, FFCs
or the engine PWB are
faulty.
7-67
Measures
Reattach the main charger
roller unit to the drum unit
and reinstall the drum unit
into the main unit to ensure
secure contact .
Clean the main charger roller
contact and correct its shape
so it is grounded securely.
Clean the developer bias
contact, or correct its shape
so that it grounds securely.
Clean the high-voltage con-
tact and correct its shape so
that it grounds securely. Or
reattach the high-voltage
PWB.
Check the wire connection of
the high-voltage PWB. Clean
the terminals and insert the
connectors all the way. When
the wires are broken, short-
circuited or have a ground
fault, or the wire terminals are
peeled off, replace the wires.
Replace the high-voltage
PWB.
Replace the LSU.
Reconnect the connectors on
the engine PWB. Then, fix or
replace the wires if they are
pinched by the other part or if
they have any damage.
When the issue is not
resolved after that, replace
the engine PWB.
2WA/2NJ/2RK
Reference
Detaching
and reat-
taching the
drum unit /
main char-
ger roller
unit
Detaching
and reat-
taching the
main char-
ger roller
unit
Detaching
and Reat-
taching the
high-volt-
age PWB
Wiring dia-
gram
Detaching
and Reat-
taching the
high-volt-
age PWB
Detaching
and Reat-
taching the
LSU
Detaching
and Reat-
taching the
engine
PWB