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iR-ADV C9000s/C7000s: Flow chart for color displacement adjustment
Color displacement
occurred
Has the measure against
mottled blank implemented?
YES
Is the verison of Dcon
software the latest?
(ver66.05 and later)
YES
Is OK displayed after
Is OK displayed after
performing INIT-ITB?
performing INIT-ITB?
YES
Is the result OK after
performing Auto Color
Dispalcement Correction in
User Mode?
YES
Continuous output of 2 sheets of 11x17 in PG6 4 Color Grid
ＮＯ
Has Color
Displacement
improved?
YES
End
Main scanning
= Identifying problems
---------------
Fixed displacement occurs.
or
Fluctuating displacement occurs.
---------------
Displacement occurs only in one color.
or
Sub scanning
Displacement occurs in all colors.
For color displacement image in red,
some cases are described in the attached "Image
samples of color displacement" for reference.
Efficacy judgement of INTROT-T/ How to make adjustment
[Conditions]
- The level of color displacement on 5 sheets of image samples varies.
- And color displacement occurs as in the left below figure.
(When the leading edge of image is placed upward, Y/M/C appear to the right of Bk.)
Changing INTROT-T is effective.
leading edge
leading edge
of image
of image
Items to be checked on the measure against mottled blank on image
[Prior conditions]
System v34.03 and later
Dcon v23.01 and later
[Areas to check] LV.2>COPIER>OPTION>IMG-TR>ITB-TYPE
with thinner belt (new belt) + new primary transfer roller (shaft diameter: 6mm), "2".
with thinner belt (new belt) + old primary transfer roller (shaft diameter: 8mm), "1".
with thicker belt (old belt), "0".
ＮＯ
[Parts change] (Refer to Exhibit "Check items")
* Belt tension spring: marked in red
* Primary transfer pressure spring: marked in black
* Secondary transfer pressure spring: marked in red
[Setting change] After implementing the measure against mottled blank, change the service mode setting as
below.
LV.1>COPIER>OPTION>FNC-SW>INTROT-T, set "1" as the setting value.
Upgrade the countermeasure Dcon software against color displacement to v66.05 and later. (System
v70.09 and later)
LV.2>COPIER>OPTION>CUSTOM>DEV-SP2, set "0" as the 2nd setting value from the right.
ＮＯ
If OK is not displayed after performing INIT-ITB:
(1) Check position of HP sticker (in rear)/ Clean edge sensor.
ＮＯ
ＮＯ
(2) Check whether spring for lifting ITB is not deformed.
(2) Check whether spring for lifting ITB is not deformed.
(3) Replace belt.
(3) Replace belt.
If Color Displacement Correction fails:
Check the alarm.
COPIER>DISPLAY>ALARM-2
ＮＯ
If there is alarm history from "34-0001" to "34-0007",
follow Service Manual.
Output multiple sheets
with fixed color
[Symptom]
displacement
Fixed displacement in
any of YMCK
Displacement
caused by
temperature rise in
machine (in main
[Symptom]
scanning)
Fixed displacement in
only K against YMC
INITROT-T for
color displacement
[Symptom]
* Refer to the figure
Fluctuating color
below.
displacement with first to
4th sheets in the JOB
Largely fluctuating
[Symptom]
[Symptom]
color displacement in
color displacement in
Large color displacement suddenly occurs only
Large color displacement suddenly occurs only
main scanning
main scanning
with some sheets out of several tens to
with some sheets out of several tens to
several hundreds of sheets.
In addition, the color displacement order of
YMCK is switched.
Color displacement
occurs in main scan, or
sub scan direction?
Output multiple sheets
with fixed color
displacement
[Symptom]
Fixed displacement in
any of YMCK
Displacement caused
by temperature rise
in machine (in sub
[symptom]
scanning)
Fixed displacement in
only K against YMC.
[Symptom]
Fluctuating color displacement
Flutter of the drum
in any of YMCK
rotation
* The rotation of
the encoder is
No improvement in
unereadable.
color displacement
Random color
[Symptom]
displacement in
Large color displacement suddenly occurs
sub scanning.
only with some sheets out of several tens to
several hundreds of sheets.
In addition, the color displacement order
p
of YMCK is switched.
of YMCK is switched.
[How to make adjustment]
In Service Mode (Lv.1),
COPIER＞OPTION＞FNC-SW＞INTROT-T, adjust the setting value (0 to 3).
INTROT- T
Changing INTROT-T is not effective.
3
2
1
0
0
= (Ref) Note about INIT-ITB related
Release pressure against the ITB unit when moving the machine.
After releasing the pressure against the ITB unit, apply pressure
After releasing the pressure against the ITB unit, apply pressure
on the belt again to perform INIT-ITB.
on the belt again to perform INIT-ITB.
= (Ref) Initial actions when color diaplacement correction fails:
Output 1 sheet of large size in PG5 in each color to check that the overall image is normal.
If light density and fault in the pressure mechanism of the primary transfer roller occur,
and image density is incorrect, color displacement correction does not work correctly.
[Remedy]
[Probable cause]
- Error in correction of color
Manually adjust color displacement (IMG-REG)
displacement patch
LV.1>COPIER>ADJUST>IMG-REG
[Probable cause]
Fluctuating color
Increase frequency of color displacement correction between papers.
displacemnent caused by
LV.2>COPIER>OPTION>FEED-SW>PINT-REG, set "1" as the setting
temperature rise in the
machine
[Probable cause]
Continuously output 5 sheets of small size in PG32.
- ITB shifts when start
Change
INTROT-T while checking image to make adjustment.
moving
(Refer to the figure below to make judgement)
[Probable cause]
[Probable cause]
Ver.66.05 has solved the problem.
Ver.66.05 has solved the problem.
- Unstable ITB
- Unstable ITB
* If it does not work, attach/detach or replace
displacement correction
[Probable cause]
[Remedy]
- Error in correction of color
Manually adjust color displacement (IMG-REG).
displacement patch
LV.1>COPIER>ADJUST>IMG-REG
[Probable cause]
Color displacement caused by
Increase frequency of color dispalcement correction between papers.
temperature rise in the
LV.2>COPIER>OPTION>FEED-SW>PINT-REG, set "1" as the setting value.
machine
[Probable cause]
Soiled encoder of the drum drive
Clean the encoder wheel / encoder sensor
assembly
[Probable cause]
Attach/detach or replace the drum drive unit.
Drum drive unit failure
LV.1>COPIER>ADJUST>FEED-ADJ>TBLT-SPD, set "4" as the setting value.
[Probablem cause]
ITB drive assembly control failure
* If necessary, adjust the leading edge margin and image magnification in sub
caused by stick-slip between the drum and
ITB
ITB
Number of
Displacement correction for each color (target)
sheets
Yellow
Magenta
Cyan
1st, 2nd
0.08mm
0.08mm
0.4mm
3rd
0.04mm
0.04mm
0mm
4th
0.02mm
0.02mm
0mm
1st, 2nd
0.06mm
0.06mm
0.4mm
3rd
0.02mm
0.02mm
0mm
4th
0mm
0mm
0mm
1st, 2nd
0.04mm
0.04mm
0mm
3rd
0mm
0mm
0mm
4th
0mm
0mm
0mm
1st, 2nd
0mm
0mm
0mm
3rd
3rd
0mm
0mm
0mm
0mm
0mm
0mm
4th
4th
0mm
0mm
0mm
0mm
0mm
0mm
For the new products of iR ADV C9280/9270/7270/7260
Series, start the work from here.
<How to make adjustment>
Output one sheet of small or large size in PG6 (4 color grid),
enter a value in IMG-REG depending on displacement levels of
each color with reference to Bk. (visual adjustment)
1. Position adjustment for main scan
Adjustment items: REG-H-Y / REG-H-M / REG-H-C
Adjustment range: -128 to +128
[Remedy]
Adjustment resolution: per 0.02mm (1200dpi per pixel)
Adjustment direction: "+": rear of the copier, "-": front of the copier
value.
[Remedy]
[Remedy]
[Remedy]
the ITB unit.
<How to make adjustment>
Output one sheet of small or large size in PG6 (4 color grid),
enter a value in IMG-REG depending on displacement levels of each color
with Bk as reference. (visual adjustment)
2. Position adjustment for sub scan
Adjustment items: REG-V-Y / REG-V-M / REG-V-C
Adjustment range: -128 to +128
Adjustment resolution: per 0.02mm (1200dpi per pixel)
Adjustment direction:
[Remedy]
[Remedy]
[Remedy]
[Remedy]
* After the setting change, perform color displacement correction.
scanning.
scanning.
* If color displacement does not occur, set "0".
* If color displacement does not occur, set "0".
Black
0mm
0mm
0mm
0mm
0mm
0mm
0mm
0mm
0mm
0mm
0mm
0mm
0mm
0mm
"+": downstream in feeding direction,
"-": upstream in feeding direction
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