B. Transfer charger current adjustment
1
Remove the developing unit, the transfer/separation charger unit,
the main charger unit, and the waste toner collection bottle from
the copier.
2
Remove the process unit from the copier.
3
Remove the photoconductor drum from the process unit. Attach
the electrode sheet with rubber band or tape to the photoconduc-
tor drum.
4
Install the photoconductor drum with the electrode sheet to the
process unit, and install the process unit to the copier.
5
Arrange so that the electrode sheet lead wire can be taken out
from the developing unit side, and install the drum holder unit to
the copier.
6
Clean the transfer charger wire and install the transfer/separation
charger unit to the copier.
(Do not install the main charger unit.)
7
Connect the electrode sheet and the digital multi meter (or an
ammeter), and manually turn on the door switch.
8
Check the drum current in the front frame side and the rear frame
side. The difference between the currents in the front and the rear
sides must be within 5.0
µ
A.
a. Turn on the main switch, and execute simulation 8-08. (THVG is
turned on for 30 sec.)
b. Measure the drum current in the front side and the rear side.
•
When the microswitch is OFF, the drum current in the front
frame side is displayed.
•
When the microswitch is ON, the drum current in the rear
frame side is displayed.
c. Check that the difference between the currents in the front and
the rear sides is within 5.0
µ
A. If the difference is more than
5.0
µ
A, the charger unit is defective. Replace it with a new one.
9
Adjust the THVG output current.
a. Turn on the main switch and execute simulation 8-06.
(THVG turns on for 30 sec.)
b. Adjust the THVG output adjustment volume VR201 so that the
THVG output is –62
±
3
µ
A.
(Note) Check that the black clip is grounded to the machine chassis
completely.
When UKOGE0043CS01 is used:
Control 1: Set to DCmA.
Control 1: Set to 2.
Red clip: Connect to (+).
Blue clip: Connect to (–).
When a DC ammeter is sued:
Red clip: Connect to (–) of the DC ammeter.
Blue clip: Connect to (+) of the DC ammeter.
N/C
N/O COM
(OFF)
N/C
N/O COM
(ON)
VR201
2
2 0
2 00
(DCmA)
F
R
Digital multi meter
(UKOGE0043FC01)
Green clip
Yellow clip
Black clip
Orange
White
White
Orange
(Microswitch)
Black
Blue Red
Copier chassis
Blue clip
Red clip
8 – 4