AR-C270 (serv.man11). (Section 7) Settings Adjustments M17-M20 - Sharp Copying Equipment Service Manual (repair manual)

ar-c270 (serv.man11) service manual
Model
AR-C270 (serv.man11)
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21
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Service Manual
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Device
Copying Equipment / (Section 7) Settings Adjustments M17-M20
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ar-c270-sm11.pdf
Date

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ADJ M17
Copy quality adjustment
(1) Note before execution of copy quality adjustment
(Necessary conditions for execution of copy quality adjustment)
Before performing color quality adjustment, the following adjustments must have been completed normally, which will affect copy quality.
The importance level is as shown below.
(The following adjustment items directly affect copy quality and should be performed in advance to the copy quality
adjustment.)
1) Adjustment items: ADJ M7, ADJ M8, ADJ M9, ADJ M10
ADJUSTMENT ITEM
SIMULATION
ADJ M7
Image skew adjustment (Scanner (Writing) unit)
64-1
61-4
ADJ M8
Photoconductor phase adjustment
44-20 (Old)
44-31 (New)
ADJ M9
Main scanning direction copy magnification ratio
adjustment (Manual adjustment) (Scanner
(Writing) unit)
ADJ 1
Main scanning direction copy magnification ratio
adjustment (Scanner (Writing) unit) (Black)
50-10
Main scanning direction image registration
adjustment (Manual adjustment) (Scanner
(Writing) unit)
ADJ 2
Main scanning direction color image resist adjustment
(Scanner (Writing) unit) (Color)
Main scanning direction copy magnification ratio
adjustment (Scanner (Writing) unit) (Color)
50-20
ADJ M10 Sub scanning direction color image resist
adjustment (Manual adjustment) (Scanner
(Writing) unit) (Color)
50-21
The user color balance adjustment must be set to the default (center).
WORK ITEM
PURPOSE
NOTE
Default setting for User Color balance adjustment (Special mode)
Set the color balance to the standard state.
Check that it is set to the center.
SIM 26-55 must be set to DISABLE.
SIM No
ITEM
Normal setting
(Default)
Phenomenon when set to ENABLE
NOTE
AR-C150
AR-C250/C160/C270
26-55
MODE SETUP DISABLE
Decrease in toner quantity on images (Color shift
/ degraded sharpness in black characters and
black-line images) / Improved fusing capability
Higher image contrast
with higher clearness /
Lower gradation
Set to DISABLE when
adjusting the copy
quality.
The set value of SIM 46-27 must be set to the default.
SIM No
ITEM
SPEC
Phenomenon when the set value is changed
Phenomenon when
the value is outside
the normal value range
NOTE
AR-C150/C250
AR-C160/C270
Default
Default
46-27
A (Color
copy
mode)
50
70
When the set value is increased, the black
toner quantity on black lines and in black
character outline section is decreased. On the
other hand, when the set value is decreased,
the black toner quantity on black lines and in
black character outline section is increased.
In Text - Printed Photo/ Text/ Text - Photo copy
mode, the black toner quantity on black lines
and in black character outline section.
(Sharpness of black lines and black characters
is changed.)
In Text - Printed
Photo/ Text/ Text -
Photo copy mode,
sharpness or
clearness of black
lines and black
characters is degraded.
Set to 70 when
adjusting the
copy quality.
B (Black-
and-white
copy
mode)
50
Set to 50 when
adjusting the
copy quality.
7 –  24
The set value of the following simulation must be set to the default.
SIM No
ITEM
Normal setting (Default)
Phenomenon when the set value is
changed
NOTE
AR-C150
AR-C250
AR-C160/C270
46-1
A
50
50
50
The density and color balance in the low
density section of color copy are
changed.
Set to the default when
adjusting the copy quality.
Do not adjust the density in the
low density section by using this
simulation.
B
50
50
50
C
50
50
50
D
50
50
50
E
50
50
50
F
50
50
G
46
46
H
46
46
I
46
46
46-2
A –  O
50
50
50
The density in the low density section of
monochrome copy is changed.
46-10 –
19
A –  O
500
500
500
The color copy density and color
balance are changed. (each copy mode)
Set to the default when
adjusting the copy quality.
46-20
A –  O
500
500
500
The color copy density and color
balance of all copy modes are changed.
Set to the default when
adjusting the copy quality.
All the functions of SIM 44-1 must be set to ENABLE.
SIM No
ITEM
NORMAL
SETTING
CONDITION
Phenomenon when set to DISABLE
NOTE
44-1
DEVE
ENABLE
Toner concentration correction for developer
use frequency is not performed.
Improper copy, toner dispersion, image high
density section abnormality, developer
dispersion, insufficient image density
All functions
must be set to
ENABLE.
HUMID
ENABLE
Process section corrections for change in
humidity (toner concentration, transfer
voltage, resist roller rotation speed
correction) are not performed.
Improper color balance, abnormality,
improper copy, toner dispersion, developer
dispersion, improper image density, image
shift, image flow, image dirt
DM POSI ENABLE
OPC drum phase correction is not performed. Image color shift, banding
HT
ENABLE
Half-tone image density correction is not
performed.
Improper half-tone image density, improper
copy, improper color balance, tone jump
TC
ENABLE
Transfer voltage correction for a change in
humidity or paper kind is not performed.
Half-tone image section abnormality,
improper image density, low density inside
image outline
MD
ENABLE
Correction (laser power) for use frequency of
OPC drum (change in sensitivity) is not
performed.
Insufficient image density
(The following adjustment items affect copy quality, but there is no need to adjust them frequently. In case of a trouble,
however, they should be checked and adjusted.)
1) Adjustment item: ADJ M1, ADJ M2, ADJ M4, ADJ M6
ADJUSTMENT ITEM
SIMULATION
ADJ M1
DV doctor gap adjustment
ADJ M2
DV roller main pole position adjustment
ADJ M4
High voltage adjustment
ADJ 1
Main charger grid voltage adjustment
8-2
ADJ 2
DV bias voltage adjustment
8-1
ADJ 3
Transfer voltage adjustment
8-6 (Old)
44-30 (New)
ADJ M6
Image density sensor adjustment
ADJ 1
Image density sensor calibration
44-13
ADJ 2
Image density sensor sensing position adjustment
44-23
(The following adjustment items do not affect copy quality directly.)
1) Adjustment items: ADJ M5, ADJ M11, ADJ M12, ADJ M14, ADJ M15, ADJ M16, ADJ M18, ADJ M19, ADJ M20, ADJ M23, ADJ M24, ADJ M25
(Relationship between servicing contents and copy quality adjustment)
Note that the procedures before and after the copy quality adjustment differ depending on the conditions of the machine and the servicing contents.
Follow the copy quality adjustment procedure flow to perform procedures according to the conditions.
There are following 5 major cases.
1) When installing
2) When performing the periodic maintenance
3) When replacing consumable parts in repair work
4) When not replacing consumable parts in repair/check work
5) When perform in repair/check work
7 –  25
(2) Copy quality adjustment procedure flow
Perform the copy quality adjustment referring to the following work flow.
No
1
2
3
4
5
6
7
8
9
10
11
22 (Auto)/
20 (Manual)
22 (Auto)/
21 (Manual)
ADJ M9A
(ADJ M9)
ADJ M8
ADJ M7
ADJ M6
ADJ M5
ADJ M3
ADJ M9A
(ADJ M10)
JOB No
Work item
Simulation
When
installing
Repair (When a consumable part is replaced)/maintenance
After replacing
OPC drum (
1)
After replacing
developer (
2)
After replacing
transfer belt
After disposing
transfer section
waste toner

After cleaning
scanner
(reading) section
When in
periodic
maintenance
When in
repair/check
 (without replacing
consumable parts)
Toner concentration reference control level setup
Developer counter clear
OPC drum counter clear
Image density sensor adjustment
Image density sensor position adjustment
Image skew adjustment
OPC drum phase adjustment
Transfer section waste toner counter clear
Half-tone correction level is set to zero.
Main scan direction image resist adjustment
Sub scan direction image resist adjustment
25
24
24
44
44
64
44
24
44
50
50
2
5
7
13
23
1
20 (Old)/31 (New)
8
27
START
Perform ADJ1 CCD gamma adjustment.
SIM 63-03 (Normal document mode)
Copy color balance density check
(Check in the Text/Photo mode. ) (AR-C150)
(Check in the Text/Printed photo mode. ) (AR-C160/C250/C270)
(Test chart UKOG-0162FCZZ/UKOG-0283FCZZ is used.)
Are the copy
color balance and density
satisfactory ?
YES
NO
(Next page)
(Next page)
Is the CCD replaced?
YES
NO
Set the SIT chart
(UKOG-0280FCZZ) on
the original table.
Enter the SIM 63-03
mode and press the
EXECUTE key.
Copy color balance density check
(Check in the Text/Photo mode. ) (AR-C150)
(Check in the Text/Printed photo mode. ) (AR-C160/C250/C270)
(Test chart UKOG-0162FCZZ/UKOG-0283FCZZ is used.)
Process correction is forcibly
performed. (SIM 44-6)
Execute the half tone image
correction. (SIM 44-26)
The necessary work items for each condition are marked with " 
."
When replacing a consumable part, /when repairing or checking (without replacement of a consumable part) / 
when installing the machine, follow the work flow below. 
: Standard adjustment flow
7 –  26
Perform ADJ2 copy color
balance/density auto adjustment.
(SIM 46-24)
In the fine
adjustment, the copy
color balance and the
density are in the
satisfactory?
Is the color balance/
density adjustment performed
for each copy mode ? (Does
the user request that ?)
YES
YES
NO
NO
Perform the manual adjustment of
ADJ3 copy color balance, density
adjustment. (SIM 46-21)
Are the copy color
balance and density
satisfactory ?
Is it adjusted to
a customized color
balance?
YES
YES
NO
NO
Perform the copy density
adjustment in the low
density section for ADJ4
all the copy modes.
(SIM 46-10 –  19)
Check the copy color balance and the density. 
(Check in the Text/Photo mode. ) (AR-C150)
(Check in the Text/Printed photo mode. ) (AR-C160/C250/C270)
(Use the test chart UKOG-0283FCZZ.)
END
Enter the SIM 46-24 mode and select
C:A3 (11 x 17) paper. (Auto selection)
Press the EXECUTE key. (The
adjustment pattern 1 is printed.)
Set the adjustment pattern 1 on
the original table, select the
FACTORY mode, and press the
EXECUTE key. (Auto adjustment
step 1)     
*
1
Press the REPEAT key.
Press the EXECUTE key.
(Adjustment pattern 2 is printed.)
Set the adjustment pattern 2 on
the original table, and press
the EXECUTE key.
(Auto adjustment step 2)
Press the OK key. (The initial setup
of half tone image correction is
automatically performed.)
Are the copy
color balance and
density
satisfactory ?
YES
NO
Cancel SIM 46-24.
SET M1 Auto color balance adjustment
service target is set. (SIM 63-7)
Enter the SIM 63-7 mode.
Press the SETUP key.
Set the color patch image (adjustment
pattern) printed in the copy color balance/
density adjustment on the original table,
and press the EXECUTE key.
Press the REPEAT key.
Press the EXECUTE key.
Press the OK key.
Cancel SIM 63-7.
Perform the initial setup of half tone
image correction. (SIM 44-21)
Execute the half tone image
correction.  (Forcible execution)
(SIM 44-26)
Are the copy color
balance and the density
in the specified level ?
YES
NO
Check the copy color balance and the density. 
(Check in the Text/Photo mode. ) (AR-C150)
(Check in the Text/Printed photo mode. ) (AR-C160/C250/C270)
(Use the test chart UKOG-0283FCZZ.)
Perform the initial setup of half tone
image correction. (SIM 44-21)
Execute the half tone image correction.
 (Forcible execution) (SIM 44-26)
Perform ADJ 1A CCD gamma adjustment 
(copy document mode). (SIM 63-9)
Set the copy of the SIT chart
on the document table.
Enter the SIM 63-9 mode,
and press the [EXECUTE] key.
Make a copy of the SIT chart
(UKOG-0280FCZZ) in the
Text/Printed Photo mode.
<AR-C160/C250/C270>
The number 
of times is 
limited to 
3 times
The number 
of times is 
limited to 
3 times
Use SIM 46-21 to
print the color
balance check
sheet, and check
the patch color
balance of process
black. 
*1:  When adjusting to a customized color balance,
select the SERVICE mode. 
(Back page)
(Back page)
: Standard adjustment flow
7 –  27
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