Sharp Mx 2300n Service Manual

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 47
 20-L Color document identification level (ACS
operation) setting
When the machine is used with some adjustment values changed
from the default values, this adjustment is required in the following
cases.
* When a U2 trouble occurs.
* When the MFP PWB is replaced.
* When the EEPROM on the MFP PWB is replaced.
* When the user requests for the adjustment.
This setting is used to set the recognition level of a color image in a
document.
The actual ACS operation is executed according to the combination
of the judgment reference value in the color auto mode set by the
device and this setting.
When a monochrome document cannot be judged as a mono-
chrome document or when a color document cannot be judged as a
color document, change this setting. This setting is applied to the
color auto copy mode.1) Enter the SIM 46-33 mode.
2) Select the ACS mode with [NEXT] key and [BACK] key.
3) Select the setting mode of P/SIM LEVEL with the scroll key.
When a monochrome document is not recognized as a mono-
chrome document, increase the set value.
When a color document is not recognized as a color docu-
ment, decrease the set value.
After entering the set value, press [OK] key to save the set
value to the memory.
The figure in the table indicates the ACS setting level in the
device setting.
The ACS setting level of the device setting (the judgment refer-
ence value in the color auto mode) is changed with the setting
of SIM 46-33 ACS/P/SIM LEVEL.
The left and the upper area from the cross point of the device
setting on the table and the ACS/P/SIM LEVEL setting serves
as the ACS operation condition.
Device setting ACS setting level (Judgment reference set
value in the color auto mode) (5 steps)
[Monochrome] 1 ← 2 ← 3 → 4 → 5 [Color]
SIM 46-33 ACS/P/SIM LEVEL (3 steps)
Weak hue [Monochrome]↔[Color] Strong hue
XC XB XA
* Adjustment in 3 steps of device setting
(Example) When the ASC setting level of device setting (judgment
reference set value in the color auto mode) is 2 and SIM 46-33
ACS/P/SIM LEVEL is set to 3, the following area serves as the
ACS operating condition.
0
A:AxAUTO
BxEXPOSURE1
SIMULATION NO.46-43
EXPOSURE ADJUSTMENT(FAX : SUPER FINE)
x
11
OK
TEST
EXECUTE
CLOSE
Cx
Dx
EXPOSURE2
EXPOSURE3
Area level 5 Area level 4 Area level 3 Area level 2 Area level 1
Canbeset
optionally.About 10mm x
5mmAbout 5mm x
5mmAbout 3mm x
4mmAbout 1mm x
3mm
(30000 pixel or
more)(30000 pixel) (15000 pixel) (7000 pixel) (1875 pixel)
ACS color judgment settingHue area (Device setting ACS setting level
(Judgment reference set value in the color auto mode))
Large hue areaSmall hue area
Hue
level 5
Hue
level 4
Hue
level 3
Hue
level 2
Hue
level 1
Hue level
(ACS/P/SIM
LEVEL)
Large color
area
Small color
area
Area level 5 Area level 4 Area level 3 Area level 2 Area level 1
Can be set
optionally.
(30000 pixel or
more)About
10mm × 5mm
(30000 pixel)About
5mm×5mm
(15000 pixel)About
3mm × 4mm
(7000 pixel)About
1mm × 3mm
(1875 pixel)
A
B
C
A
B
C
:š
:™
:˜
:š
:™:š
:™
:˜
:˜ 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 48 (NOTE) Though the judgment reference in the color auto mode of
device setting is set to 5: Monochrome, if a monochrome docu-
ment is not recognized as a monochrome document, increase the
set value of the set item A TH ACS5 ENLARGE (area level 5).
After entering the set value, press [OK] key to save the set value to
the memory.
Except for the above set item, do not change the setting in the mar-
ket. Set it to the default value.
 
21Printer color balance/density adjust-
ment
(1) Note before execution of the printer color balance/density
adjustment
(Requisite condition before execution of the printer color balance/
density adjustment)
Before execution of the printer color balance/density adjustment,
the copy color balance/density adjustment must have been com-
pleted properly.
(This adjustment is required in the following cases.)
* Basically same as when the copy color balance/density adjust-
ment is required. Refer to the page of the ADJ 20 print color bal-
ance/density adjustment.
* After the copy color balance/density adjustment.
Area level 5 Area level 4 Area level 3 Area level 2 Area level 1Can be set
optionally.About 10mm x
5mmAbout 5mm x
5mmAbout 3mm x
4mmAbout 1mm x
3mm
(30000 pixel or
more)(30000 pixel) (15000 pixel) (7000 pixel) (1875 pixel)
Hue
level 5
Hue
level 4
Hue
level 3
Hue
level 2
Hue
level 1 ACS color judgment settingHue area (Device setting ACS setting level
(Judgment reference set value in the color auto mode))
Hue level
(SIM LEVEL)
)¡áB™B

Large hue area
Weak hue
Strong hue
Small hue area 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 49 (2) Flow of printer color balance/density adjustment procedures
START
Process correction is forcibly
performed. (SIM 44-6)
Execute the half tone image
correction. (SIM 44-26)
Check the printer color balance/
density. (Check the test pattern
of SIM 64-5.)
Are the copy
color balance and density
at satisfactory
levels?No
(to Next page)
Ye s
(to Next page): Standard adjustment flow
Is PCL mode
supported?
Ye sNo
Use SIM 67-25 to the color balance
check sheet, and check the patch
color balance of process black.
Printer color balance/density adjustment 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 50
4
Change the color balance/
density adjustment factory
targets. (SIM 67-26)
Make the factory printer balance target
(when adjusting the printer color
balance/density with SIM 67-24) same
as the service color balance target and
the color balance target when adjusting
the density. (SIM67-28)
NoCan the
printer color balance and
density be adjusted to satisfactory
levels with the fine
adjustment?
Perform the manual adjustment of ADJ 21C
printer color balance, density adjustment. (SIM 67-25)
Perform ADJ 21B printer color balance/
density auto adjustment. (SIM 67-24)
Enter the SIM 67-24 mode and select
A3 (11 x 17) paper. (Auto selection)
(from Previous page)(from Previous page)
: Standard adjustment flow
Use SIM 67-25 to print the color balance
check sheet, and check the patch color
balance of process black.
Use SIM 67-25 to print the color balance
check sheet, and check the patch color
balance of process black./Check the
printer color balance and density.
(Check the test pattern of SIM 64-5)
Are the printer
color balance and density
at satisfactory
levels?
Were the
printer color balance
and density
customized?
Ye s
Ye s No
No
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 OK key. (The initial
setup of half tone image correction
is automatically performed.)
Cancel SIM 67-24.
3
Use SIM 67-25 to print
the color balance
check sheet, and
check the patch color
balance of process
black./Check the
printer color balance
and density.
(Check the test pattern
of SIM 64-5)
Are
the color
balance and density at
the satisfactory
levels?Were
all the three kinds
of color balance/density
adjustment targets
changed?
(SIM 67-26)
No
4
Ye s
No
3
Auto color balance adjustment
service target is set.
Enter the SIM 67-27 mode.
Press the SETUP key.
Set the color patch image (adjustment
pattern) printed in the printer 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 67-27.
The printer color
balance and density
adjustment completed.
Execute the half tone image correction.
(Forcible execution) (SIM 44-26)
Check the printer color balance/density.
(Check the test pattern of SIM 64-5)
Are the
printer color
balance and the density
in the specified
level ?
Ye s
No
9à
*1: When adjusting to a customized color balance, select the SERVICE mode.
Ye s Ye s
Were
the three kinds of
color balance/density
adjustment targets
changed?
(SIM 67-26)
NoYe s
Is PCL mode
supported?
No
Ye s
Use SIM 67-25 to print
the color balance
check sheet, and
check the patch color
balance of process
black.
Is PCL mode
supported?
NoYe s
Is PCL mode
supported?No
Ye s
Is the printer
color balance density
adjustment performed
with SIM67-25?
Ye s
No 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 51 (3) Printer color balance/density check
(Note)
Before checking the copy color balance and the density, be sure to
execute the following procedures in advance.
* Execute the high density image correction (process correction)
forcibly. (SIM 44-6)
* Execute the half tone image correction forcibly. (SIM 44-26)
(Procedure)
a. When the PCL mode is supported:
Execute SIM 64-5 to print the print test pattern.
Set each set value to the default and press [EXECUTE] key. The
print test pattern is printed.
The print density must be changed gradually from the lighter level
to the darker level. The density changing direction must not be
reversed. The density level of each color must be almost at the
same level.
b. When the PCL mode is not supported: (In the case of GDI
model)
Use SIM 67-25 to print the color balance adjustment sheet and
compare each process (CMY) black patch color balance and the
black patch to check the color balance.The print density must be changed gradually from the lighter level
to the darker level. The density changing direction must not be
reversed.
The density level of each color must be almost at the same level.
Patch B may not be copied.
Patch A must not be copied.
 21-A Printer color balance adjustment (Auto
adjustment)
a. General
The color balance adjustment (auto adjustment) is used to adjust
the print density of each color (Cyan, Magenta, Yellow, Black) auto-
matically with SIM 67-24 or the user program.
(When this adjustment is executed, the color balance adjustments
of all the print modes are revised.)
There are following two modes of the automatic color balance
adjustment.
1) Auto color balance adjustment by the serviceman) (SIM 67-24
I used.)
2) Auto color balance adjustment by the user (The user program
is used.) (The color balance target becomes the service tar-
get.)
The auto color balance adjustment by the user is provided to
reduce the number of service calls.
If the print color balance is lost for some reasons, the user can
use this color balance adjustment to recover the balance.
When, however, the machine has a fatal problem or when the
machine environment is greatly changed, this function does
not work effectively.
On the other hand, the auto color balance adjustment by the
serviceman functions to recover the normal color balance
though the machine environment is greatly changed. If the
machine has a fatal problem, repair and adjust it for obtaining
the normal color balance.
To perform the adjustment, the above difference must be fully
understood.
b. Note for execution of the color balance adjustment (Auto adjust-
ment)
1) The copy color balance adjustment must have been completed
properly.
2) Be sure to use the specified paper for color.
3) Before execution of the image quality check and the image
quality adjustment, be sure to execute the following correc-
tions forcibly to set the image forming section to the optimum
state.
* Execute the high density image correction (Process correc-
tion) forcibly. (SIM 44-6)
* Execute the half tone image correction forcibly. (SIM 44-26)
c. Adjustment procedure
(Auto color balance adjustment by the serviceman)
1) Enter the SIM 67-24 mode.
2) Press [EXECUTE] key. (A3 or 11 x 17 paper is automatically
selected.)
The color patch image (adjustment pattern) is printed out.
Max
A B C D E F G H I J K L M N O C M Y
Bk
High densityLow density Fig. 1 PG image
1) The max. density
section is not blurred.
3) Patch for each of C, M, Y, BK
• The patch density is identical between patches or not reversed.
 The patch density is changed gradually.
2) Patch C or D of each of Y, C, M,
and BK is very slightly copied.
PatchAofeachofY,M,
C, and BK are not copied.
SIMULATIONNO.67-24TESTPRINTER ENGINE HALFTONE AUTO ADJUSTMENT MODE
EXECUTE
0CLOSE
PRESS [EXECUTE] TO PRINT THE TEST PATCH.(PLEASE USE SPECIFIED TYPE OF A3 OR 11”˜17” SIZE PAPER
FOR THIS ADJUSTMENT 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 52 3) Set the color patch image (adjustment pattern) paper printed in
procedure 2) on the document table.
Place the printed color patch image (adjustment pattern) paper
so that the thin lines on the paper are on the left side. Place 5
sheets of white paper on the printed color patch image (adjust-
ment pattern) paper.
4) Press [FACTORY] key on the operation panel, and press
[EXECUTE] key.
When the color balance is customized with the manual color
balance adjustment (SIM 67-25) according to the users
request and the color balance is registered as the service tar-
get with SIM 67-27, if the color balance is adjusted to that color
balance, select the service target.
The print color balance adjustment (step 1) is automatically
executed to print the color balance check patch image. Wait
until the operation panel shown in procedure 5) is displayed.
Remark:
(Descriptions on FACTORY key and SERVICE key in the color
balance auto adjustment menu.)
There are two kinds of the gamma target for the color balance
auto adjustment; Factory and Service.
FACTORY key and SERVICE key are used to select one of the
above two.
Factory target color balance: Standard color balance (It can be
selected from the three kinds of fixed color balances with SIM
63-11.)
Service target color balance: The color balance can be cus-
tomized according to the users request. (Variable)
When shipping, the service target gamma data and the factory
target gamma data are the same.
Both are set to the standard color balance when shipping.
For the service target, the customized color balance gamma
can be registered with SIM 63-7.5) Press [OK] key on the operation panel.
Remark:
After pressing [OK] key, the initial setting of the half tone image
correction is started. During the operation, NOW REGISTER-
ING THE NEW TARGET OF HALFTONE is displayed. This
operation takes several minutes.
After completion of the operation, Please quit this mode is
displayed.
Do not cancel the simulation until Please quit this mode is
displayed.
6) Check the color balance and density.
(Method 1)
Check to insure that the printed color balance check patch
image is within the following specifications.
The print density must be changed gradually from the lighter
level to the darker level. The density changing direction must
not be reversed.
The density level of each color must be almost at the same
level.
Patch B may not be copied.
Patch A must not be copied.
PRINTER CALIBRATION
0SIMULATIONNO.67-24TESTPRINTER ENGINE HALFTONE AUTO ADJUSTMENT MODE
PLEASE SELECT THE MODE (FACTORY) OR (SERVICE) AND PLACE
THE PRINTED TEST PATCH ON DOCUMENT GLASS THEN PRESS [EXECUTE].
LIGHT ARE A AT LE FT SIDE ON DOC U ME NT GLASS.,
SERVICEFA C T O RYEXECUTE
CLOSE
CLOSESIMULATIONNO.67-24TESTPRINTER ENGINE HALFTONE AUTO ADJUSTMENT MODE
OK
0
CONFIRM THE ADJUSTED PATCH AND PRESS [OK] TO REGISTER THIS PATCH DATAPRESS [REPEAT] TO CONTINUE THIS PROCEDURE.
REPEAT
CLOSE
SIMULATIONNO.67-24TESTPRINTER ENGINE HALFTONE AUTO ADJUSTMENT MODE
0CLOSE
COMPLETED THIS PROCEDURE.
PLEASE QUIT THIS MODE.
Max
A B C D E F G H I J K L M N O C M Y
Bk
High density Low densityFig. 1 PG image
1) The max. density
section is not blurred.2) Patch C or D of each of Y, C, M,
and BK is very slightly copied.
PatchAofeachofY,M,
C, and BK are not copied.3) Patch for each of C, M, Y, BK
• The patch density is identical between patches or not reversed.
 The patch density is changed gradually. 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 53 (Method 2)
By printing the color balance adjustment sheet with SIM 67-25
and comparing each process (CMY) black patch color balance
with the black patch, the color balance adjustment can be
checked more precisely.
(Method 3)
(This method cannot be used when the machine supports only
the GDI mode.)
When the PCL mode is supported, use SIM 64-5 to print the
print test pattern.
Set each set value to the default and press [EXECUTE] key,
and the print test pattern is printed out.
The print density must be changed gradually from the lighter
level to the darker level. The density changing direction must
not be reversed. The density level of each color must be
almost at the same level.
When the factory target is selected in the procedure 4) and the
auto adjustment is executed but a satisfactory result is not
obtained on the color balance and the density, use SIM 67-26
to change the factory color balance target and repeat the pro-
cedures from 1).
If a satisfactory result is not obtained with the above proce-
dures, execute the manual color balance adjustment (ADJ
20C).
When the service target is selected in the procedure 4) and the
auto adjustment is executed but a satisfactory result is not
obtained, execute the manual color balance adjustment (ADJ
21C).
7) Cancel SIM 67-25.
For the machine which supports only the GDI mode, the
adjustment is completed.
8) Use SIM 44-26 to execute the half tone image correction (forc-
ible execution).
Enter the SIM 44-26 mode, and press [EXECUTE] key.
[EXECUTE] key is highlighted and the operation is started.
It takes several minutes to complete the operation. After com-
pletion of the operation, COMPLETE is displayed.(Normal end (Auto transition))
(Abnormal end (Auto transition))
9) After completion of the operation, cancel SIM 44-26.
10) Use SIM 64-5 to print the print test pattern and check the print
color balance and the density again.
Set each set value to the default and press [EXECUTE] key. The
print test pattern is printed out.
If a satisfactory result on the print color balance and the density is
not obtained with the automatic adjustment, execute the manual
adjustment (SIM 67-25) (ADJ 21B).
 21-B Printer color balance adjustment (Manual
adjustment)
This adjustment is required in the following cases.
* When the copy color balance/density adjustment is required.
Refer to the page of the ADJ print color balance/density adjust-
ment.
* After execution of the copy color balance/density adjustment.
a. General
The color balance adjustment (Manual adjustment) is used to
adjust the copy density (15 points for each color) of each color
(CMYK) manually when the automatic adjustment cannot obtain
the specified result or when a fine adjustment is required or when
the user requests to change (customize) the color balance.
In this adjustment, only the patch of each color is adjusted in the
above case where the automatic adjustment cannot obtain the
specified result.
When the color balance is lost, execute the automatic color bal-
ance adjustment in advance and execute this adjustment for better
efficiency.
b. Note for execution of the color balance adjustment (Manual
adjustment)
1) The copy color balance adjustment must have been completed
properly.
2) When setting the color patch image adjustment pattern on the
document table, place 5 sheets of white paper on the color
patch image adjustment pattern.
3) Be sure to use the specified paper for color.
4) Before execution of the image quality check and the image
quality adjustment, be sure to execute the following correc-
tions forcibly to set the image forming section to the optimum
state.
* Execute the high density image correction (Process correc-
tion) forcibly. (SIM 44-6)
* Execute the half tone image correction forcibly. (SIM 44-26)
Max
A B C D E F G H I J K L M N O
High density Low density
C MY
Bk
CMY
mixed
color
3)PatchCorDofeachofY,C,M,
and BK is very slightly copied.
2) Patch A of each of Y, M,
C, and BK are not copied.4)PatchforeachofC,M,Y,BK
• The patch density is identical between patches or not reversed.
 The patch density is changed gradually.1) The max. density
section is not blurred.
SIMULATIONNO.44-26TEST
HALF TONE DENSITY CORRECT EXECUTION
EXECUTE
0
CLOSE
TOUGH [EXECUTE] THEN EXECUTION START.
KMYC
SIMULATIONNO.44-26TESTHALF TONE DENSITY CORRECT EXECUTION
[S_VALUE]
#1: 907, #2: 902, #3: 909, #4:921, #5:936
#6: 347, #7:992, #8:1047, #9:1081, #10:1137
#11:1183, #12:1222, #13:1261, #14:1283,#15:1260
1/1EXECUTE
CLOSE0
KMYC
SIMULATIONNO.44-26TESTHALF TONE DENSITY CORRECT EXECUTION
[S_VALUE]
#1: ERR, #2: ERR, #3: ERR, #4: ERR, #5: ERR
#6: ERR, #7: ERR, #8: ERR, #9: ERR, #10: ERR
#11: ERR, #12: ERR, #13: ERR, #14: ERR,#15: ERR
1/1EXECUTE
CLOSE0 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 54 c. Adjustment procedure
1) Enter the SIM 67-25 mode.
2) Press [EXECUTE] key. (A3 or 11 x 17 paper is automatically
selected.)
The color balance adjustment pattern is printed.
3) Check that the following specification is satisfied or the desired
color balance is obtained.
If the above specification is not satisfied, perform the following
procedures.
The print density must be changed gradually from the lighter
level to the darker level. The density changing direction must
not be reversed.
The density level of each color must be almost at the same
level.
Patch B may not be copied.
Patch A must not be copied.
When, however, the color balance is adjusted according to a
request from the user, there is no need to set to the standard
color balance stated above.4) Select the color to be adjusted with the color select key, and
select the adjustment point with the scroll key.
5) Enter the adjustment value with 10-key and press [OK] key.
The adjustment value is set in the range of 245 – 755 (1 –
999). When SIM 67-24 is used to adjust the automatic color
balance and density, all the set values of this simulation are set
to 500.
To increase the density, increase the adjustment value. To
decrease the density, decrease the adjustment value.
Repeat procedures of 2) – 5) until the condition of 3) is satis-
fied.
When the overall density is low, or when the density is high
and patch A is copied, use the arrow key to adjust all the
adjustment values of A – O to a same level collectively.
Then, adjust each patch density individually. This is an efficient
way of adjustment.
Referring to the black and gray patches, adjust so that each
process (CMY) black/gray patch color balance of A – O
approaches the black/gray patch level as far as possible.
6) Cancel SIM 67-25.
(For the machine which supports only the GDI mode, the
adjustment is completed.)
7) Use SIM 64-5 to print the print test pattern.
NOTE: Only for the machine which support the PCL mode.
(For the machine which supports only the GDI mode, this pro-
cedure cannot be used.)
Set each set value to the default and press [EXECUTE] key.
The print test pattern is printed out.
The print density must be changed gradually from the lighter
level to the darker level. The density changing direction must
not be reversed. The density level of each color must be
almost at the same level.
8) Use SIM 44-26 to execute the half tone image correction (forc-
ible execution).
Enter the SIM 44-26 mode and press [EXECUTE] key.
[EXECUTE] key is highlighted and the operation is started.
It takes several minutes to complete the operation. After com-
pletion of the operation, COMPLETE is displayed.
(Normal end (Auto transition))
EXECUTEEXECUTE
OK
CLOSE0
A:A9æxx
B9æxx
C9æxx9çPOINT1
9çPOINT2
9çPOINT3
SIMULATIONNO.67-25
PRINTER ENGINE COLOR BALANCE MANUAL ADJUSTMENT9æPG
xx
:1:*99:	
OK
TEST
KCMYEXECUTE
D9æxx9çPOINT4
0
A:A9æxx
B9æxx
C9æxx9çPOINT1
9çPOINT2
9çPOINT3
SIMULATIONNO.67-25
PRINTER ENGINE COLOR BALANCE MANUAL ADJUSTMENT9æPG
xx
:1:*99:	
OK
TEST
KCMYEXECUTE
D9æxx9çPOINT4
CLOSE
0
A:A9æxx
B9æxx
C9æxx9çPOINT1
9çPOINT2
9çPOINT3
SIMULATIONNO.67-25
PRINTER ENGINE COLOR BALANCE MANUAL ADJUSTMENT9æPG
xx
:1:*99:	
OK
TEST
KCMYEXECUTE
D9æxx9çPOINT4
CLOSE
10-key
or self print end
Max
A B C D E F G H I J K L M N O
High density Low density
C MY
Bk
CMY
mixed
color
3)PatchCorDofeachofY,C,M,
and BK is very slightly copied.
2) Patch A of each of Y, M,
C, and BK are not copied.4)PatchforeachofC,M,Y,BK
• The patch density is identical between patches or not reversed.
 The patch density is changed gradually.1) The max. density
section is not blurred.
SIMULATIONNO.44-26TEST
HALF TONE DENSITY CORRECT EXECUTION
EXECUTE
0
CLOSE
TOUGH [EXECUTE] THEN EXECUTION START.
KMYC
SIMULATIONNO.44-26TESTHALF TONE DENSITY CORRECT EXECUTION
[S_VALUE]
#1: 907, #2: 902, #3: 909, #4:921, #5:936
#6: 347, #7:992, #8:1047, #9:1081, #10:1137
#11:1183, #12:1222, #13:1261, #14:1283,#15:1260
1/1EXECUTE
CLOSE0 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 55 (Abnormal end (Auto transition))
9) After completion of the operation, cancel SIM 44-26.
10) Use SIM 64-5 to print the print test pattern again.
Set each set value to the default and press [EXECUTE] key.
The print test pattern is printed out.
The print density must be changed gradually from the lighter
level to the darker level. The density changing direction must
not be reversed. The density level of each color must be
almost at the same level.
If the color balance is customized, use SIM 67-27 to register
the color balance as the service target.
If the color balance is not customized, this procedure is not
required.
If the customized color balance is registered as the service tar-
get, the automatic color balance adjustment can be made in
the next color balance adjustment.
In the next color balance adjustment, select the service target
color balance in the automatic color balance adjustment mode
to make an adjustment to the similar color balance as the reg-
istered color balance.
(Auto color balance adjustment service color balance target
gamma setting)
a. General
When the automatic color balance adjustment is executed, a cer-
tain color balance (gamma) is used as the target.
There are following three kinds of the target.
• Factory color balance (gamma) target
• Service color balance (gamma) target
• User color balance (gamma) target
In the above three, only the service color balance target can be set
to a desired level.This adjustment is required in the following cases.
* When the copy color balance/density adjustment (manual adjust-
ment) is executed with SIM 67-25.
* When a U2 trouble occurs.
* When the MFP PWB is replaced.
* When the EEPROM on the MFP PWB is replaced.
* When the user requests for customizing the color balance.
* When the service color balance target gamma is judged as
improper.
• Color balance target for the printer color balance adjustment
KMYC
SIMULATIONNO.44-26TESTHALF TONE DENSITY CORRECT EXECUTION
[S_VALUE]
#1: ERR, #2: ERR, #3: ERR, #4: ERR, #5: ERR
#6: ERR, #7: ERR, #8: ERR, #9: ERR, #10: ERR
#11: ERR, #12: ERR, #13: ERR, #14: ERR,#15: ERR
1/1EXECUTE
CLOSE0
Kind Descriptions
A Factory color 
balance (gamma) 
targetThere are three kinds of the color balance target, 
and each of them is specified according to the 
machine design. Use SIM 67-26 to select one of 
them as the factory target. The default setting 
(factory setting) is the color balance (DEF1) 
which emphasizes color reproduction.
B Service color 
balance (gamma) 
targetThis target is used when the user requests to 
customize the color balance to user’s desired 
level. In advance, the user’s unique color 
balance must be registered as the service color 
balance target. 
The above registration (setting) is made by the 
serviceman with SIM 67-25 to adjust the color 
balance and with SIM 67-27 to register it. 
This color balance target is used when the user 
executes the color balance adjustment. 
When, therefore, the service color balance target 
is changed, the color balance target of the user’s 
color balance adjustment is also changed. 
When, however, SIM 67-28 is executed, the color 
balance is set to the factory color balance target 
set with SIM 67-26. 
The default setting (factory setting) of the color 
balance is same as the factory color balance 
target. (Emphasized on color reproduction 
(DEF1))
If the user does not request for customizing the 
color balance, be sure to use SIM 67-28 to set 
the color balance to the factory color balance 
target.
C User color 
balance (gamma) 
targetSame color balance as the service color balance 
(gamma) target
When the service color balance target is 
changed, this color balance target is also 
changed accordingly. 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 56 • Relationship between the factory target and the service target and the color balance target for the user color balance adjustment in the
printer color balance adjustment (SIM 67-24)
• Factory target in the printer color balance adjustment (SIM 67-24)
By use of SIM 67-26, one of the following color balances can be set as the factory color balance target.
Each of the three color balances cannot be changed. (Fixed)
• Service color balance target in the copy color balance adjust-
ment (SIM 67-28).
For the service color balance target, an optional color balance
can be adjusted with SIM 67-25 and registered with SIM 67-27.
When, however, SIM 67-28 is executed, the color balance is set
to the same balance as the factory color balance target set with
SIM 67-26.
• Color balance target in the user color balance adjustment
This color balance is same as the service color balance target in
the copy color balance adjustment (SIM 67-24). When, therefore,
the service color balance target is changed, this target is also
changed accordingly.
(Meaning of the service color balance target gamma data and
the purpose of registration)
This procedure must be executed only when the color balance is
customized with SIM 67-25.If the color balance is not customized, this procedure is not
required.
After completion of the customized color balance adjustment (Man-
ual) with SIM 67-25 according to the users request, use SIM 67-27
to register the service color balance target data by use of the
printed adjustment pattern.
By this procedure, the service color balance target is revised.
It is recommendable to keep the printed adjustment pattern with
SIM 67-25. This adjustment pattern can be used to register the
same color balance target to another machine.
It is also useful to register the service color balance target data.
Do not fold it and keep it under the circumstances which protect it
from discoloration and dirt.
The service color balance target data are basically registered
immediately after the color balance adjustment (Manual) with SIM
67-25.
Factory color balance
target (DEF2)
Factory color balance
target (DEF1)
Factory color balance
target (DEF3)
Factory color balance
target (DEF1)Service color balance
target=
Factory color balance
target (one of DEF1 – 3)Service color balance
target= Factory color balance
target (one of DEF1 – 3)
Service color balance
target (Unique)≠Use SIM 67-25 to adjust the
optional color balance, and
use SIM 67-27 to register it.
Execute SIM 67-28.
(The service color balance
target is the same as the
factory color balance target.)
Factory setting
Color balance target for
the user color balance
adjustmentService color balance
target=
Use SIM 67-26 to select
one of the three kinds of
color balance targets.Color balance target in the copy color balance
automatic adjustment (SIM 67-24)
Color balance target in the user color balance adjustment
(A)
Factory color balance target (DEF2)
SIM67-28
+b* Direction of Yellow
Hue
+a*
Direction
of RedDirection of Green
Direction of Blue
Factory color balance target (DEF2) =
Service color balance target/Color balance
target for the user color balance adjustment
Factory color
balance target
(DEF1)
SIM67-28
Factory color balance target
(DEF1) = Service color balance
target/Color balance target for the
user color balance adjustment
DEF1
DEF2Color balance with emphasis on color
reproduction (factory setting)
Color balance with slightly strong Cyan
DEF3 Color balance with emphasis on CyanDefault
Factory color balance target (DEF3)
SIM67-28
Factory color balance target (DEF3) =
Service color balance target/Color balance
target for the user color balance adjustment