Konica Minolta bizhub C658 Service Manual page 1908

bizhub C658/C558/C458/C368/C308/C258
Stabilization type
Mode 1 (initialization and image
stabilization)
Mode 1 (long image stabilization) Executed mainly when there is a change in environmental condition.
Mode 2 (short image
stabilization)
Mode 3 (gamma correction +
color registration control)
Mode 4 (color registration
control)
Mode 5 (monochrome, long
image stabilization)
Mode 6 (monochrome, short
image stabilization)
Mode 7 (monochrome, gamma
image stabilization)
17.4.2 Control sequence by mode
• A different control sequence applies according to the mode of image stabilization.
• Control is performed in the specified sequence for each mode.
Sequence Mode 1
1 IDC sensor
adjustment
2 Dmax density
adjustment
3 LD light intensity
adjustment
4 Color registration
adjustment
5 Dmax density
adjustment
6 LD light intensity
adjustment
7 Gamma
correction
• *1: The IDC sensor uses the output value calculated in the last IDC registration sensor adjustment and checks that the value measured on
the surface of the transfer belt (background level) is within the specified range. If the measured value is out of the specified range, mode 1
is used when the next image stabilization is carried out.
• *2: Unlike the color registration adjustment of mode 1, simplified color registration control is performed.
• *3: Monochrome-only mode
17.5 Operation timing
17.5.1 Predrive operation
• The following describe the stabilization operations executed when, for example, the main power switch is turned ON, the sleep mode is
canceled, the front door is closed, or a malfunction is reset.
Mode
Mode 1 • A new drum unit or a new developing unit is detected.
• A new transfer belt is detected.
• The machine recovers from a toner empty condition.
• While a warning code is being displayed.
• In the last image stabilization, the value of IDC sensor detection
was out of the specified range.
• A change in environment is detected. (a change in environment
exceeding the threshold value is detected since the last image
stabilization sequence)
• The count of the number of printed pages is 10,000 as counted
from the last LD adjustment.
• After skew adjustment reset (service mode).
Mode 2 • A Dmax adjustment request is received as a result of the last
gamma correction.
• The count of the number of printed pages after the gamma
adjustment is 400 or more.
• Information is provided indicating that the last stabilization
control was discontinued.
• There is a change in temperature after the lapse of a
predetermined period of time after a developing drive stop.
O THEORY OF OPERATION bizhub C658/C558/C458/C368/C308/C258 > 17. IMAGE
Executed when "Initialize + Image Stabilization" is selected from the control panel.
Executed mainly after the main power switch is turned ON.
Executed when the count of the number of printed pages during a print cycle reaches 400 and there is a
change in machine interior temperature.
Executed when there is a change in machine interior temperature.
Dedicated to monochrome and executed when there is a change in environmental condition.
Dedicated to monochrome and executed when the number of printed pages during a print cycle reaches
1000 or there is a change in machine interior temperature.
Dedicated to monochrome and executed during or after a print cycle.
Mode 2 Mode 3
IDC sensor IDC sensor
detection *1 detection *1
Dmax density Color registration
adjustment adjustment *2
Color registration Gamma
adjustment *2 correction
LD light intensity -
adjustment
Gamma -
correction
- -
- -
Operation condition
Contents
Mode 4 Mode 5 *3
IDC sensor IDC sensor
detection *1 adjustment
Color registration Dmax density
adjustment *2 adjustment
- LD light intensity
adjustment
- Dmax density
adjustment
- LD light intensity
adjustment
- Gamma
correction
- -
• Not specified
• Standard or Color priority selection
• Standard or Color priority selection
O-133
STABILIZATION CONTROL
Mode 6 *3 Mode 7 *3
IDC sensor IDC sensor
detection detection
Dmax density Gamma
adjustment correction
LD light intensity
adjustment
Gamma
correction
-
-
-
Image stabilization setting
-
-
-
-
-