Canon imageRUNNER ADVANCE C2030 Service Manual page 92

2
Process/Operation > Image Formation System > Controls > Image Stabilization Control
Conditions for execution
At last After printing of 25 sheets Approx.
rotation 15 sec.
After printing of 50 sheets Approx.
18 sec.
After printing of 100 to 200 Approx.
sheets 17 sec.
Every 1500% of accumulated Approx.
image ratio after printing 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)
2 Process/Operation > Image Formation System > Controls > Image Stabilization Control
Control type
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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.
Developing
Cylinder
Photosensitive
Drum
Primary
Charging
Roller
Developing
high-voltage
Laser Scanner Unit
PCB(UN7)
Dmax control
2-58
ITB
Patch
Sensor
Rear
(UN43)
Patch
Sensor
Front
(UN44)
Primary Charging
PCB(UN6)
Patch image data
DC Controller PCB(UN9)
F-2-83
2-58