Develop ineo+ 6500 Service Manual page 143

23. IMAGE STABILIZATION CONTROL
C. Color registration adjustment
(1) Purpose
• Performed in order to correct the misalignment in main or sub scanning direction, entire horizontal magnifi-
cation, and skew.
(2) Operation
• The color registration sensors /Fr and /Rr reads a patch image created on the transfer belt.
• The correction is carried out by calculating the amount of the misalignment from the read value.
(3) Execution timing
• When adjusting in service mode.
• When the sub power switch (SW2) is turned on with the fusing temperature is 50 °C or less.
• Every 1,000 prints.
• When printing is not performed for a predetermined period of time.When the temperature in the write sec-
tion has changed 10 °C.
• When printing is not performed for one hour after the correction is finished.
D. PGC sensor baseline correction control 1, 2
(1) Purpose
• This correction is necessary to be executed in advance to carry out the maximum density control and the
gamma correction control.
(2) Operation
• To carry out the maximum density control, reference values for the PGC sensor (PS11) are determined by
measuring the density of the transfer drum surface when no toner is attached on the belt.
(3) Execution timing
• When printing has not been performed for 6 hours or longer.
• Every 1,000 prints.
• When a change in humidity exceeds 20% from the last time the control is performed.
• When turning on the sub power switch (SW2) after replacing the materials.
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Theory of Operation Ver1.0 Sep.2006