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[8] ADJUSTMENTS
1. Process section
A. High voltage output adjustment
(1) Developing bias output check and setup
1) Remove the rear cabinet to allow checking of the high voltage
monitor output pin.
2) Execute the simulation of the target high voltage.
(See the table below.)
3) Select the mode to be set with 10-key, and press START key.
4) Enter the set value with 10-key and press START key. The set value
is outputted for 30 sec.
5) Apply a high voltage tester between the measurement pin and the
frame.
Note: Take care not to short the measuring pin to the frame.
MC grid MAIN GRID
AUTO
(SIM 8-2)
CHARACTER Text mode
MIX
PHOTO
PRINTER
FAX
Transfer current THV+
FRONT
(SIM 8-6)
BACK
Developing bias DV BIAS
AUTO
(SIM 8-1)
CHARACTER Text mode
MIX
PHOTO
PRINTER
FAX
PLUS
Separation voltage SHV
FRONT
(SIM 8-17)
BACK
Transfer voltage THV
(SIM 8-17)
2. Engine section
A. Resist quantity setup
•This adjustment requires a high level of accuracy.
We recommend using the default setting.
This adjustment is performed in the following cases:
•When the void quantity is changed by the paper feed tray.
•When paper is skewed.
Complete the following adjustments before performing resist quantity
setup.
•LSU right angle adjustment
•Print magnification ratio adjustment
•Print off-center setup
•Void area setup
Monitor output
voltage
AE mode
-650V±5V
-650V±5V
Text/Photo
-650V±5V
mode
Photo mode
-650V±5V
Printer mode
-650V±5V
Fax mode
-650V±5V
Front
Back
AE mode
-500V±5V
-500V±5V
Text/Photo
-500V±5V
mode
Photo mode
-500V±5V
Printer mode
-500V±5V
Fax mode
-500V±5V
Positive bias
+150V±5V
Front
+1.25V±0.1V
Rear
+1.25V±0.1V
-800V±10V
AR-M280U ADJUSTMENTS 8-1
6) The unit stops after 30 sec of output.
Default
Set range
Set value
645
200~900
645
200~900
645
200~900
645
200~900
645
200~900
645
200~900
45PPM : 267
0~620
28/35PPM : 220
45PPM : 310
0~620
28/35PPM : 267
485
0~745
485
0~745
485
0~745
485
0~745
485
0~745
485
0~745
150
0~255
45PPM : 160
0~375
28/35PPM : 120
45PPM : 160
0~375
28/35PPM : 120
780
0~1250
1) Execute SIM 51-2.
2) Adjust the resist quantity so that paper transport is stable.
<Factory setup value>
45PPM
BPT
T1
T2
DESK
ADU
28/35PPM
BPT
T1
T2
DESK
ADU
Measurement
High voltage
pin
probe
impedance
CN2-7
100MΩ
CN2-1
100MΩ
CN2-3
10MΩ
CN2-5
10GΩ
55
60
50
50
50
60
65
55
55
55
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