4. Others
(1) Transfer charger wire installation
Install the transfer charger wire as shown below. (Clean the charger
wire at every 40K copies and replace it at every 80K copies.)
Transfer charger unit (TC unit)
(Note for replacement of the charger wire)
a
Do not twist or deform the charger wire.
b
After replacement, be sure to clean the charger wire with alcohol.
(Be sure to use alcohol only.)
c
After wiping with alcohol, wipe with a dry cloth.
d
Use charger wire of 70
µ
(DWIR-0466CSZZ).
(2) How to adjust the separation corona voltage
1) Install the developer unit and OPC drum unit into the main body.
2) Set the hight voltage probe (1000:1) to digital multimeter.
3) Set the digital multimeter range to DC V.
4) Connect the digital multimeter to the SHVG check pin on the lower
unit control PWB and chassis GND.
5) Execute simulation 8-7 and adjust the separation corona voltage
to 3.5
±
0.35v by rotates VR1 on the lower unit control PWB.
(SHVG turns on 30 sec)
(3) How to adjust the developing bias voltage
1) Install the developer unit and OPC drum unit into the main body.
2) Set the digital multimeter range to DC 500V.
3) Connect the digital multimeter to the developing bias output ter-
minal on the lower unit control PWB and chassis GND.
4) Execute simulation 8-1 and adjust the developing bias voltage to
–200
±
3v by rotates VR2 on the lower unit control PWB.
(Developing bias turns on 30sec)
10 0.5
Charger wire
Improper
Charger wire Improper
Tension spring
2~3mm
Cut the wire at the
root of the screw
Wind two turns and
tighten the screw
CORONA VOLTAGE IN THE EACH COPY MODE
COPY MODE
MAIN CORONA UNIT
TRANSFER CORONA
VOLTAGE (V)
SEPAREATION CORONA
VOLTAGE (V)
MAIN CORONA VOLTAGE
(V)
MAIN CORONA GRID
VOLTAGE (V)
N.T.S
NORMAL
–5.3Kv
780
–5.3Kv
+2.7Kv
AE
–5.3Kv
780
–5.3Kv
+2.7Kv
PHOTO
–5.3Kv
478
–5.3Kv
+2.7Kv
T.S
NORMAL
–5.3Kv
660
–5.3Kv
+2.7Kv
AE
–5.3Kv
660
–5.3Kv
+2.7Kv
7 – 30
