Operation; Leak Detection Control; Idc Sensor Led Intensity Control; Transfer Belt Surface Correction Control - Konica Minolta magicolor 1600W Service Manual

18. Image stabilization control

18.2 Operation

18.2.1

Leak detection control

• For the clearance between the photo conductor and developing roller, an optimum devel-
oping bias voltage is established that does not result in a leak image or uneven density.
18.2.2

IDC sensor LED intensity control

• The following adjustment is made to correct any changes in characteristics occurring due
to change with time and contamination of the IDC sensor (IDC): the intensity of the LED
is adjusted for the surface of the transfer belt on which no toner sticks, so that the output
value of the IDC sensor (IDC) becomes constant.
18.2.3

Transfer belt surface correction control

• The reflectance of the Image transfer belt is measured using the ADIC sensor (IDC). One
measurement is taken for one complete turn of the Image transfer belt.
• The measured value is corrected during the laser intensity adjustment control and γ cor-
rection control.
18.2.4

Control of the maximum amount of toner sticking

• The developing bias setting value is adjusted to keep constant the amount of toner stick-
ing to the surface of the photo conductor with reference to the 100% solid image.
18.2.5

Laser intensity adjustment control

• Characteristics of the photo conductor, developing, and charging change as affected by
changes with time and in environment. The intensity of the laser light is adjusted so that
fine lines and gradations of a predetermined level are reproduced at all times.
γ correction control
18.2.6
• A gradation pattern is produced on the surface of the Image transfer belt. The IDC sen-
sor (IDC) measures the density of the pattern and sends the measured result to the con-
troller for gradation adjustment.
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Theory of Operation Ver. 1.0 Nov. 2008