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Process/Operation > Image Formation System > Controls > Image Stabilization Control
Process/Operation > Image Formation System > Controls > Image Stabilization Control
Startup timing
Conditions for execution
Time required (sec.)
Control type
Startup correction (*1)
Discharge current control
ATR control (patch detection)
Primary transfer
ATVC
Secondary transfer
ATVC
Secondary transfer cleaning
D-max control
ARCDA
T control
D-half control
Brush discharge
At last
rotation
After printing of 25 sheets
Approx.
15 sec.
○
After printing of 50 sheets
Approx.
18 sec.
○
○
After printing of 100 to 200
sheets
Approx.
17 sec.
○
○
○
Every 1500% of accumulated
image ratio after printing
Approx.
17 sec.
○
○
○
After printing of 500 sheets
Approx.
42 sec.
○
○
○
○
After printing of 5000 sheets
Approx.
45 sec. ○
○
○
○
○
*1:
Correction of soiling on the ITB, correction of the Patch Sensor, etc.
CAUTION: Because the color displacement control is executed according to the environment,
there is no specific execution timing. Therefore, execution timing is not described in the table
above.
Related service mode:
COPIER > OPTION > CLEANING > OHP-PTH (to specify the number of sheets to
execute the ITB cleaning sequence after feeding of transparency)
COPIER > OPTION > CLEANING > ITBB-TMG (to specify frequency of ITB Cleaning
Band)
T-2-30
● D-max Control
The optimal developing DC bias, primary charging bias and laser output are determined
Control timing
1) When replacing the Drum Unit
2) At last rotation on a specified print basis
3) At power-on in H/H environment
4) At recovery from sleep mode
Control description
1) Main Controller PCB 2 forms patch pattern in the target color on the ITB.
2) The DC Controller measures patch density by the Patch Sensor Front (UN44)/Patch
Sensor Rear (UN43) to correct developing bias, primary charging bias and laser
output in each color to meet the target density.
Patch image data
DC Controller PCB(UN9)
Laser Scanner Unit
Dmax control
Developing DC bias
Primary charging DC bias
Laser output
Developing
Cylinder
Primary
Charging
Roller
Photosensitive
Drum
Patch
Sensor
Rear
(UN43)
Patch
Sensor
Front
(UN44)
ITB
Primary Charging
PCB(UN6)
Developing
high-voltage
PCB(UN7)
F-2-83