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Theory of Operation Ver. 8.0 Jun. 2008
B. Image stabilization during printing
Mode
• Temperature change inside the machine is detected.
(The machine detects absolute humidity that reaches
the threshold temperature change for the first time since
the image stability sequence performed last time.)
Mode 2
• When gamma correction data are out of the specified
range in the last image stabilization sequence, Vg and
Vdc are adjusted again.
• The last color registration adjustment was not success-
ful. (Alert codes P-21 or P-22)
• The predetermined count is detected. *1 and 2
(For details, see, in the following page, image stabiliza-
tion execution flow based on a count while a print cycle
is progressing.)
• When a print job includes many pages, no image stabili-
Mode 3
zation may be performed during the printing. In this
case, the machine forcefully execute image stabiliza-
tion.*1
(For details, see, in the following page, image stabiliza-
tion execution flow based on a count while a print cycle
is progressing.)
• If the machine detects the threshold PH temperature
change, only the color registration correction is exe-
cuted.
Mode 4
(For details, see, in the following page, image stabiliza-
tion execution flow based on a count while a print cycle
is progressing.)
*1 When the gamma correction data are out of the specified range in the last image stabili-
zation sequence, image stabilization control of mode 2 is executed.
*2:A copy of A4 size or equivalent is counted as one.
• MF550
2
Paper length in the sub scanning direction
216 mm or less
Over 216 mm and up to 432 mm
Over 432 mm
• MF450
Paper length in the sub scanning direction
216 mm or less
Over 216 mm and up to 432 mm
Over 432 mm and up to 648 mm
Over 648 mm and up to 864 mm
Over 864 mm and up to 1080 mm
Over 1080 mm
Y107522-3
Operation condition
Count
1
2
3
Count
1
2
3
4
5
6
Theory of Operation
22. Image stabilization control
Operation timing
• When the print mode
changes from mono-
chrome to color
• At the end of a print cycle
• When the print mode
changes from mono-
chrome to color
• At the end of a print cycle
• Between each print set
after the predetermined
count is reached.
• When the predetermined
count is reached, the
machine stops printing
and the image stabiliza-
tion is executed.
• When the print mode
changes from mono-
chrome to color
• When the count of
remaining pages reaches
the predetermined count,
the machine stops print-
ing and the image stabili-
zation is executed.
• At the end of a print cycle
161
2
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