Service manual

AR-M351U/M451U, AR-M355U/M455U ADJUSTMENTS 8 - 2
9) Move the adjustment plate in the arrow direction and adjust.
<Adjustment specification>
C. 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 and the frame.
6) The unit stops after 30 sec of output.
Specification
Marking position Measure from
the P surface above.
54.2mm
P
Default
Set range
Measurement
pin
High voltage
probe
impedance
Monitor output voltage Set value
MC grid MAIN GRID
(SIM 8-2)
AUTO AE mode 45PPM: -650V±5V
35PPM: -620V±5V
45PPM: 645
35PPM: 615
200~900 CN2-7 100MΩ
CHARACTER Text mode -650V±5V 645 200~900
MIX Text/Photo mode -650V±5V 645 200~900
PHOTO Photo mode -650V±5V 645 200~900
PRINTER Printer mode -650V±5V 645 200~900
FAX Fax mode -650V±5V 645 200~900
Transfer current
(THV+ (SIM 8-6)
FRONT Front 45PPM: 267
35PPM: 220
0~620
BACK Back 45PPM: 310
35PPM: 267
0~620
Developing bias DV
BIAS (SIM 8-1)
AUTO AE mode 45PPM: -500V±5V
35PPM: -470V±5V
485 0~745 CN2-1 100MΩ
CHARACTER Text mode -500V±5V 485 0~745
MIX Text/Photo mode -500V±5V 485 0~745
PHOTO Photo mode -500V±5V 485 0~745
PRINTER Printer mode -500V±5V 485 0~745
FAX Fax mode -500V±5V 485 0~745
PLUS Positive bias +150V±5V 150 0~255
Separation voltage SHV
(SIM 8-17)
FRONT Front 45PPM: +0.22±0.1V
35PPM: +1.37V±0.1V
45PPM: 160
35PPM: 120
0~240 CN2-3 10MΩ
BACK Rear 45PPM : +0.22±0.1V
35PPM: +1.37V±0.1V
45PPM: 160
35PPM: 120
0~240
Transfer voltage THV
(SIM 8-17)
-800V±10V 780 0~1250 CN2-5 10GΩ