Konica Minolta bizhub C658 Service Manual page 1909

bizhub C658/C558/C458/C368/C308/C258
Mode
• The stabilization is executed when the main power switch is
turned ON even without the operating condition
Mode 4 • There is a change of a predetermined value or more in
temperature after the color registration adjustment (when exiting
from the sleep mode).
Mode 5 • 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.
• A predetermined period of time or more elapses after a
developing drive stop.
Mode 6 • 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 1000 or more.
• Information is provided indicating that the last stabilization
control was discontinued.
(1) Stabilization mode setting
• Optimum image stabilization control can be selected using the administrator mode or service mode according to user's use condition.
• Three options available are the standard, color priority, and black priority modes.
• Mode of image stabilization setting is provided to maintain image quality and achieve the following purposes.
1. To reduce frequency at which the stabilization control is performed in order to reduce cost per print for users who have a low print
volume and low color ratio
2. To shorten time between when the machine is turned ON and when it is ready for printing
3. To maintain convenience for users having a high color frequency
Mode
Standard • Color stabilization is executed if image adjustments are necessary for color print or black print during predrive.
Color priority • Color stabilization is executed if image adjustments are necessary for color print or black print during predrive.
• Stabilization is executed unconditionally when the main power switch is turned ON. Warm-up time takes about 60
sec. when the main power switch is turned ON.
Black priority • Black stabilization is executed if image adjustments are necessary for black print during predrive.
• Color stabilization is executed before color print if image adjustments are necessary for color print.
17.5.2 During a print cycle (bizhub C368/C308/C258)
• When the stabilization execution condition is met during printing, a specific image stabilization mode according to the condition is selected
and executed.
Stabilization Dmax
execution adjustment
condition *1 request based
on last gamma
correction result
Any of the -
conditions is
met
None of the Yes
conditions is
met
O THEORY OF OPERATION bizhub C658/C558/C458/C368/C308/C258 > 17. IMAGE
Operation condition
Operating conditions
Print count after Change of a
gamma predetermined
correction value or more in
temperature
after last
stabilization *2
- Change
Change
• Only Color priority selection
• Only Color priority selection
• Only Black priority selection
• Only Black priority selection
Control
The number of Print count after
pages yet to be last stabilization
printed of the *3
current print job
A -
predetermined
number of
pages or more
Less than a
predetermined
number of
pages
- 800 to 1000
sheets
- 400 sheets or
more
A -
predetermined
number of
pages or more
Less than a
predetermined
number of
pages
O-134
STABILIZATION CONTROL
Image stabilization setting
Stabilization Operation timing
(mode) during print
Mode 1 is Executed by
executed interrupting the print
cycle
Executed after a
print cycle
Executed by
interrupting the print
cycle
Executed after a
print cycle
Mode 2 is Executed by
executed interrupting the print
cycle
Executed after a
print cycle