44292401TH Rev.1
51 /
Oki Data CONFIDENTIAL
COMPOSITION/OPERATION
19.2 Operation
19.2.1
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.
19.2.2
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.
19.2.3
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
J
cor-
rection control.
19.2.4
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.
19.2.5
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.
19.2.6
J
correction control
• 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.
19. Image stabilization control
19.1 Overview
• To ensure that a stabilized output image is produced at all times, the following image sta-
bilization controls are provided.
* An explanation is given of the control for each section.
Purpose
Control
Detection
To ensure stabilized transfer
output
AT
VC
* Described in the section
dealing with the transfer
Section
Temperature/ humidity sensor (TEM/
HUMS)
To ensure stabilized image
density; to ensure good tone
reproduction
IDC control
• Leak detection control
• IDC intensity control
• Transfer belt surface cor-
rection control
• Control of the maximum
amount of toner sticking
• Laser intensity adjust-
ment control
•
J
correction control
IDC sensor (IDC)
Temperature/ humidity sensor (TEM/
HUMS)
A034T2E583AA
IN
OUT
1st transfer roller
2nd transfer roller
ATVC
Grid
bias
Dev
eloping
bias
Dev
eloping
Charging
PC
IDC sensor
Temperat
u
re/
h
u
midity sensor
AIDC control
19. Image stabilization control
19.1 Overview
19.2 Operation
19.2.1
Leak detection control
19.2.2
IDC sensor LED intensity control
19.2.3
Transfer belt surface correction control
19.2.5
Laser intensity adjustment control
19.2.6
correction control
19.2.4
Control of the maximum amount of toner sticking
Summary of Contents for MC160MFP
Page 1: ...MC160MFP Maintenance Manual 011710A...
Page 18: ...44292401TH Rev 1 17 Oki Data CONFIDENTIAL MC160n Main body THEORY OF OPERATION...
Page 55: ...44292401TH Rev 1 54 Oki Data CONFIDENTIAL Auto Document Feeder Unit THEORY OF OPERARTION...
Page 61: ...44292401TH Rev 1 60 Oki Data CONFIDENTIAL MC160n Main body FIELD SERVICE...
