The Entire Image Is Light - Kyocera ECOSYS P2235dw Service Manual

(2-10) The entire image is light

Step Check description
1 Reinstalling the toner con-
tainer
2 Executing Drum refresh
3 Replacing the toner con-
tainer
3 Replenishing toner in the
developer unit
4 Reinstalling the drum unit
and developer unit
5 Correcting the developer
bias contact
6 Cleaning the DS pulley
7 Replacing the developer
unit
8 Replacing the drum unit
9 Correcting the main char-
ger contact
10 Checking the connection
11 Checking the connection
12 Replacing the high voltage
PWB
13 Replacing the LSU
14 Replacing the main/engine
PWB
Assumed cause
Toner is collected on one
side.
The drum surface has con-
densation.
The toner supply opening
does not open.
Toner in the developer unit
is degraded due to many
low coverage prints.
The drum unit or the devel-
oper unit is not properly
attached, so that the devel-
oper roller does not con-
tact the drum.
The developer bias contact
is deformed.
The DS pulleys are dirty.
The DS pulleys are faulty.
The drum surface is worn
down.
The voltage impressed to
the main charger contact is
high.
The FFC is not properly
connected or faulty.
The connector is not prop-
erly connected or the wire
is faulty.
The high voltage PWB is
faulty.
The LSU is dirty or faulty.
The main/engine PWB is
faulty.
7-21
2RV/2RW/2RX/2RY/3RA-3
Measures
Sufficiently shake the toner
container and reinstall it to
the main unit.
Execute Drum refresh.
Replace the toner container.
Consume degraded toner in
the developer unit with test
prints and replenish the toner.
Reinstall the drum unit and
developer unit.
Correct the developer bias
contact so that it surely
grounds.
Clean the DS pulleys at both
ends of the developer unit.
Replace the developer unit.
Replace the drum unit.
Correct the main charger
contact for secure ground.
Reconnect the FFC. If the
FFC terminal is peel,
deformed or broken, replace
it.
• LSU (APC PWB) - Main/
engine PWB (YC505)
Clean the terminal of the fol-
lowing wire connectors and
reconnect the connectors. If
there is no continuity, replace
the wire.
• High voltage PWB - Main/
engine PWB (YC16)
Replace the high voltage
PWB.
Replace the LSU.
Replace the main/engine
PWB.
Reference