Developing Bias Output Check And Setup; C. High Voltage Output Adjustment - Sharp AR-M455N Service Manual

9) Move the adjustment plate in the arrow direction and adjust.
P
<Adjustment specification>
Marking position Measure from
the P surface above.
MC grid MAIN GRID AUTO
(SIM 8-2)
CHARACTER Text mode
MIX
PHOTO
PRINTER
FAX
Transfer current FRONT
(THV+ (SIM 8-6)
BACK
Developing bias DV AUTO
BIAS (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)

C. High voltage output adjustment

(1) Developing bias output check and setup

1) Remove the rear cabinet to allow checking of the high voltage
2) Execute the simulation of the target high voltage.
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
5) Apply a high voltage tester between the measurement pin and
Note: Take care not to short the measuring pin and the frame.
6) The unit stops after 30 sec of output.
Specification
54.2mm
Monitor output voltage
AE mode 45PPM: -650V±5V
35PPM: -620V±5V
-650V±5V
Text/Photo mode -650V±5V
Photo mode -650V±5V
Printer mode -650V±5V
Fax mode -650V±5V
Front
Back
AE mode 45PPM: -500V±5V
35PPM: -470V±5V
-500V±5V
Text/Photo mode -500V±5V
Photo mode -500V±5V
Printer mode -500V±5V
Fax mode -500V±5V
Positive bias +150V±5V
Front 45PPM: +0.22±0.1V
35PPM: +1.37V±0.1V
Rear 45PPM : +0.22±0.1V
35PPM: +1.37V±0.1V
-800V±10V
AR-M355N/M455N ADJUSTMENTS 8 - 2
monitor output pin.
(See the table below.)
value is outputted for 30 sec.
the frame.
Default
Set range
Set value
45PPM: 645 200~900
35PPM: 615
645 200~900
645 200~900
645 200~900
645 200~900
645 200~900
45PPM: 267 0~620
35PPM: 220
45PPM: 310 0~620
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 0~240
35PPM: 120
45PPM: 160 0~240
35PPM: 120
780 0~1250
High voltage
Measurement
probe
pin
impedance
CN2-7 100MΩ
CN2-1 100MΩ
CN2-3 10MΩ
CN2-5 10GΩ