Canon imageRUNNER ADVANCE C5000 Series, Техническое пособие

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iR-ADV C9000s/C7000s: Flow chart for color displacement adjustment
Has the measure against
mottled blank implemented?
Color displacement
occurred
ＮＯ
YES
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".
[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.
Is the verison of Dcon
software the latest?
(ver66.05 and later)
Is OK displayed after
performing INIT-ITB?
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.
If OK is not displayed after performing INIT-ITB:
(1) Check position of HP sticker (in rear)/ Clean edge sensor.
(2) Check whether spring for lifting ITB is not deformed.
(3) Replace belt.
YES
ＮＯ
ＮＯ
= (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
on the belt again to perform INIT-ITB.
For the new products of iR ADV C9280/9270/7270/7260
Series, start the work from here.
End
[Remedy]
Continuously output 5 sheets of small size in PG32.
Change
INTROT-T while checking image to make adjustment.
(Refer to the figure below to make judgement)
Has Color
Displacement
improved?
Is OK displayed after
performing INIT-ITB?
Is the result OK after
performing Auto Color
Dispalcement Correction in
User Mode?
Continuous output of 2 sheets of 11x17 in PG6 4 Color Grid
(2) Check whether spring for lifting ITB is not deformed.
(3) Replace belt.
If Color Displacement Correction fails:
Check the alarm.
COPIER>DISPLAY>ALARM-2
If there is alarm history from "34-0001" to "34-0007",
follow Service Manual.
[Symptom]
Large color displacement suddenly occurs o
nly
with some sheets out of several tens to
YES
YES
YES
[Symptom]
Fixed displacement in
only K against YMC
[Symptom]
Fixed displacement in
any of YMCK
[Symptom]
Fluctuating color
displacement with first to
4th sheets in the JOB
[Remedy]
Manually adjust color displacement (IMG-REG)
LV.1>COPIER>ADJUST>IMG-REG
[Probable cause]
Fluctuating color
displacemnent caused by
temperature rise in the
machine
[Remedy]
Increase frequency of color displacement correction between papers.
LV.2>COPIER>OPTION>FEED-SW>PINT-REG, set "1" as the setting
value.
[Probable cause]
- Error in correction of color
displacement patch
[Probable cause]
- ITB shifts when start
moving
[Probable cause]
- Unstable ITB
[Remedy]
Ver.66.05 has solved the problem.
ＮＯ
ＮＯ
ＮＯ
= (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.
After releasing the pressure against the ITB unit, apply pressure
on the belt again to perform INIT-ITB.
Displacement
caused by
temperature rise in
machine (in main
scanning)
INITROT-T for
color displacement
* Refer to the figure
below.
Largely fluctuating
color displacement in
main scanning
Output multiple sheets
with fixed color
displacement
<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
Adjustment resolution: per 0.02mm (1200dpi per pixel)
Adjustment direction: "+": rear of the copier, "-": front of the copier
Color displacement
occurs in main scan, or
sub scan direction?
Sub scanning
Main scanning
[Symptom]
Large color displacement suddenly occurs o
nly
with some sheets out of several tens to
several hundreds of sheets
.
In addition, the color displacement order of
YMCK is switched.
[symptom]
Fixed displacement in
only K against YMC.
[Symptom]
Fixed displacement in
any of YMCK
[Symptom]
Fluctuating color displacement
in any of YMCK
[Symptom]
Large color displacement suddenly occurs
only with some sheets out of several tens to
several hundreds of sheets.
In addition, the color displacement order
of YMCK is switched.
[Probable cause]
- Unstable ITB
displacement correction
[Remedy]
Ver.66.05 has solved the problem.
* If it does not work, attach/detach or replace
the ITB unit.
[Remedy]
Manually adjust color displacement (IMG-REG).
LV.1>COPIER>ADJUST>IMG-REG
[Probable cause]
- Error in correction of color
displacement patch
[Probable cause]
Color displacement caused by
temperature rise in the
machine
[Remedy]
Increase frequency of color dispalcement correction between papers.
LV.2>COPIER>OPTION>FEED-SW>PINT-REG, set "1" as the setting value.
[Probable cause]
Soiled encoder of the drum drive
assembly
[Probable cause]
Drum drive unit failure
[Remedy]
Clean the encoder wheel / encoder sensor
[Remedy]
Attach/detach or replace the drum drive unit.
[Probablem cause]
ITB drive assembly control failure
caused by stick-slip between the drum and
ITB
[Remedy]
LV.1>COPIER>ADJUST>FEED-ADJ>TBLT-SPD, set "4" as the setting value.
* After the setting change, perform color displacement correction.
* If necessary, adjust the leading edge margin and image magnification in sub
scanning.
* If color displacement does not occur, set "0".
= Identifying problems
---------------
Fixed displacement occurs.
or
Fluctuating displacement occurs.
---------------
Displacement occurs only in one color.
or
Displacement occurs in all colors.
color displacement in
main scanning
Flutter of the drum
rotation
* The rotation of
the encoder is
unereadable.
Random color
displacement in
sub scanning.
No improvement in
color displacement
For color displacement image in red,
some cases are described in the attached "Image
samples of color displacement" for reference.
<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:
"+": downstream in feeding direction,
"-": upstream in feeding direction
Output multiple sheets
with fixed color
displacement
Displacement caused
by
temperature rise
in machine (in sub
scanning)
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 not effective. Changing INTROT-T is effective.
leading edge
of image
[How to make adjustment]
In Service Mode (Lv.1),
COPIER
＞
OPTION
＞
FNC-SW
＞
INTROT-T, adjust the setting value (0 to 3).
p
of YMCK is switched.
ITB scanning.
* If color displacement does not occur, set "0".
leading edge
of image
Yellow Magenta Cyan Black
1st, 2nd 0.08mm 0.08mm 0.4mm 0mm
3rd 0.04mm 0.04mm 0mm 0mm
4th 0.02mm 0.02mm 0mm 0mm
1st, 2nd 0.06mm 0.06mm 0.4mm 0mm
3rd 0.02mm 0.02mm 0mm 0mm
4th 0mm 0mm 0mm 0mm
1st, 2nd 0.04mm 0.04mm 0mm 0mm
3rd 0mm 0mm 0mm 0mm
4th 0mm 0mm 0mm 0mm
1st, 2nd 0mm 0mm 0mm 0mm
3rd 0mm 0mm 0mm 0mm
4th 0mm 0mm 0mm 0mm
2
1
0
Number of
sheets
INTROT- T
Displacement correction for each color (target)
3
3rd 0mm 0mm 0mm 0mm
4th 0mm 0mm 0mm 0mm
0