d-Color MF4003/MF3303
P THEORY OF OPERATION > 1.
d-Color MF4003/MF3303
P-60
Seque
nce
Mode 1
(initialization
and image
stabilization)/
(long image
stabilization)
Mode 2
(short image
stabilization)
Mode 3
(gamma
corr
color
registration
control)
Mode 4
(monochrome,
long image
stabilization) *4
Mode 5
(color
registration
control)
Mode 6
(monochrome,
gamma
correction)
Mode 7
(gamma
correction)
Mode 8
(monochrom
e, short
image
stabilization)
2
Dmax density
adjustment
Dmax density
adjustment
Color
registration
adjustment *2
Dmax density
adjustment
Color
registration
adjustment *2
Gamma
correction *3
Gamma
correction *3
Dmax
density
adjustment
3
LD light
intensity
adjustment
Color
registration
adjustment *2
Gamma
correction *3
LD light
intensity
adjustment
-
-
-
LD light
intensity
adjustment
4
Color
registration
adjustment
Gamma
correction *3
-
Dmax density
adjustment
-
-
-
Gamma
correction *3
5
Dmax density
adjustment
-
-
LD light
intensity
adjustment
-
-
-
-
6
LD light
intensity
adjustment
-
-
Gamma
correction *3
-
-
-
-
7
Gamma
correction
-
-
-
-
-
-
-
• *1: The IDC sensor uses the output value calculated in the last IDC registration sensor adjustment and check that the value measured on
the surface of the transfer belt (background level) is within the specified range. If the measured value is out of the specified range, mode
1 is used when the next image stabilization is carried out.
• *2: Unlike the color registration adjustment of mode 1, simplified color registration control is performed.
• *3: Unlike the gamma correction of mode 1, simplified gamma correction control is performed.
• *4: To be executed twice when an imaging unit or a transfer belt unit is replaced, or when the machine recovers from a toner empty
condition.
(4) Predrive operation
• The following describe the stabilization operations executed when, for example, the main power switch is turned ON, the sleep mode is
canceled, the front door is closed, or a malfunction is reset.
Mode
Image stabilization mode
Operation condition
Image stabilization setting
Mode 1
Initialization and image stabilization
• A new imaging unit/Y,M,C is detected.
• A new transfer belt unit is detected
• The machine recovers from a toner empty condition.
• While a warning code is being displayed.
Not specified
Long image stabilization
• 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 number of paper printed after the last LD
adjustment exceeds a predetermined value.
Standard or Color priority
selection
Mode 2
Short image stabilization
• A Dmax adjustment request is received as a result
of the last gamma correction.
• The number of paper printed after the gamma
correction exceeds a predetermined value.
• Information is provided indicating that the last
stabilization control was discontinued.
• There is a change in temperature after the lapse of
a predetermined period of time after a developing
drive stop.
Standard or Color priority
selection
The stabilization is executed when the main power
switch is turned ON even without the operating condition
Only Color priority selection
Mode 3
Gamma corr color
registration control
• The number of paper printed after the gamma
correction exceeds a predetermined value.
• There is a change of a predetermined value or more
in temperature after the color registration
adjustment (when exiting from the sleep mode).
Standard or Color priority
selection
Mode 4
Monochrome, long image
stabilization
• A new imaging unit/K is detected.
• 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 number of paper printed after the last LD
adjustment exceeds a predetermined value.
Only Black priority selection
Service Manual
Y119930-3
Summary of Contents for d-Color MF 4003
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