Sharp MX-6500N / MX-7500N (serv.man19) Service Manual ▷ View online
MX-7500N ADJUSTMENTS AND SETTINGS 5 – 29
Monochrome copy check items (Check to confirm the following:)
1) There are 12 void areas.
2) The resolution of 4.0 (5 points) can be seen.
3) The density difference between the F and the R sides is not so
1) There are 12 void areas.
2) The resolution of 4.0 (5 points) can be seen.
3) The density difference between the F and the R sides is not so
great.
4)
There are no white and black streaks.
5)
The background density is not so light.
6)
The black low-density gradation is copied slightly.
Void
Resolution
Void
Low-density gradation
Resolution
Density difference between the F and the R sides.
No white and black streaks
No white and black streaks
Background density
Resolution
Resolution
Void
Void
Void
Void
Resolution
MX-7500N ADJUSTMENTS AND SETTINGS 5 – 30
Method 2
Use SIM46-21 to print the color balance adjustment sheet, and
check each process (CMY) black patch color balance and the black
patch in order to confirm that the color balance adjustment is
proper or not more precisely.
Use SIM46-21 to print the color balance adjustment sheet, and
check each process (CMY) black patch color balance and the black
patch in order to confirm that the color balance adjustment is
proper or not more precisely.
If the color balance of each patch of the process black (CMY mixed
color) is slightly shifted to Magenta, it means that the adjustment is
proper. If the color balance of the adjustment pattern printed in this
mode is slightly shifted to Magenta, it is converted into the natural
gray color balance by the color table in an actual copy mode.
(When the color balance target is DEF 1.)
color) is slightly shifted to Magenta, it means that the adjustment is
proper. If the color balance of the adjustment pattern printed in this
mode is slightly shifted to Magenta, it is converted into the natural
gray color balance by the color table in an actual copy mode.
(When the color balance target is DEF 1.)
(4) Printer color balance/density check
CAUTION: 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)
* The half-tone image correction is forcibly executed. (SIM 44-26)
Method 1
Execute SIM 64-5 to print the print test pattern.
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.
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.
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.
Method 2
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.
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.
If the color balance of each patch of the process black (CMY mixed
color) is slightly shifted to Magenta, it means that the adjustment is
proper. In an actual print mode, it is converted into the natural gray
color balance by the color table. (When the color balance target is
DEF 1.)
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.
If the color balance of each patch of the process black (CMY mixed
color) is slightly shifted to Magenta, it means that the adjustment is
proper. In an actual print mode, it is converted into the natural gray
color balance by the color table. (When the color balance target is
DEF 1.)
9-A
Scanner calibration (CCD calibration)
This adjustment must be performed in the following cases:
* When the CCD unit is replaced.
* When a U2 trouble is occurred.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
* When the CCD unit is replaced.
* When a U2 trouble is occurred.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
(1) Note before adjustment
- Check that the table glass, No. 1, 2, 3 mirrors, and the lens sur-
- Check that the table glass, No. 1, 2, 3 mirrors, and the lens sur-
face are free from dirt and dust.
(If there is some dust and dirt, wipe and clean with alcohol.)
(If there is some dust and dirt, wipe and clean with alcohol.)
- Check to confirm that the patches in BK1 and BK2 arrays of the
SIT chart (UKOG-0280FCZZ or UKOG-0280FCZ1) are free from
dirt and scratches.
If they are dirty, clean them.
If they are scratched or streaked, replace with new one.
dirt and scratches.
If they are dirty, clean them.
If they are scratched or streaked, replace with new one.
Q
O P
N
M
L
K
J
I
H
G
F
E
D
C
B
A
Y
M
C
Bk
High
density
density
1) The max. density section is not blurred.
2) Patch C or D of each of Y, M, C, and BK is very slightly copied.
Low
density
density
CMY
blend
blend
3) Patch for each of Y, M, C, BK
The patch density is identical between patches or not reversed.
The patch density is changed gradually.
The patch density is changed gradually.
PRINTER CALIBRATION
Q
O P
N
M
L
K
J
I
H
G
F
E
D
C
B
A
Y
M
C
Bk
1) The max. density section is not blurred.
2) Patch C or D of each of Y, M, C, and BK is very slightly copied.
Low density
CMY
blend
blend
3) Patch for each of Y, M, C, BK
The patch density is identical between patches or not reversed.
The patch density is changed gradually.
The patch density is changed gradually.
High density
MX-7500N ADJUSTMENTS AND SETTINGS 5 – 31
(2) Adjustment procedures
1) Set the SIT chart (UKOG-0280FCZZ or UKOG-0280FCZ1) to
1) Set the SIT chart (UKOG-0280FCZZ or UKOG-0280FCZ1) to
the reference position on the left rear frame side of the docu-
ment table.
Set the chart so that the lighter density side of the patch is on
the left side.
ment table.
Set the chart so that the lighter density side of the patch is on
the left side.
If the SIT chart is not available, execute SIM 63-5 to set the
CCD gamma to the default. In this case, however, the adjust-
ment accuracy is lower when compared with the adjustment
method using the SIT chart.
CCD gamma to the default. In this case, however, the adjust-
ment accuracy is lower when compared with the adjustment
method using the SIT chart.
CAUTION: Check to insure that the SIT chart (UKOG-0280FCZZ or
UKOG-0280FCZ1) is in close contact with the docu-
ment table.
ment table.
NOTE: UKOG-0280FCZZ is equivalent to UKOG-0280FCZ1.
2) Enter the SIM 63-3 mode and press [EXECUTE] key.
2) Enter the SIM 63-3 mode and press [EXECUTE] key.
The automatic operation is started. During the adjustment,
[EXECUTE] is highlighted. After completion of the adjustment,
[EXECUTE] returns to the normal display.
[EXECUTE] is highlighted. After completion of the adjustment,
[EXECUTE] returns to the normal display.
NOTE: Since the SIT chart (UKOG-0280FCZZ or UKOG-0280FC
Z1) is easily discolored by sunlight (especially ultraviolet
rays) and humidity and temperature, put it in a bag (such
as a dark file) and store in a dark place of low temperature
and low humidity.
rays) and humidity and temperature, put it in a bag (such
as a dark file) and store in a dark place of low temperature
and low humidity.
SET 1 Color balance adjustment target setup
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 setting is required in the following cases.
* When the color balance and density adjustments are executed
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 setting is required in the following cases.
* When the color balance and density adjustments are executed
manually (SIM46-21) (SIM67-25)
* U2 trouble has occurred.
* When the MFP PWB is replaced.
* When the EEPROM on the MFP PWB is replaced.
* The scanner control PWB has been replaced.
* The EEPROM on the scanner control PWB has been replaced.
* When the user requests for customizing the color balance.
* When the service color balance target gamma is judged as
* When the MFP PWB is replaced.
* When the EEPROM on the MFP PWB is replaced.
* The scanner control PWB has been replaced.
* The EEPROM on the scanner control PWB has been replaced.
* When the user requests for customizing the color balance.
* When the service color balance target gamma is judged as
improper.
SET 1A Copy color balance adjustment target setup
Each color balance target for the copy color balance adjust-
ment
ment
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Type
Descriptions
A
Factory color
balance (gamma)
target
balance (gamma)
target
There are three kinds of the color balance target,
and each of them is specified according to the
machine design. Use SIM 63-11 to select one of
them as the factory target. The default setting
(factory setting) is the color balance (DEF1)
which emphasizes color reproduction.
and each of them is specified according to the
machine design. Use SIM 63-11 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)
target
balance (gamma)
target
This 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 46-21 to
adjust the color balance and with SIM 63-7 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 63-8 is executed, the color
balance is set to the factory color balance target
set with SIM 63-11. 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 63-8 to set the
color balance to the factory color balance target.
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 46-21 to
adjust the color balance and with SIM 63-7 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 63-8 is executed, the color
balance is set to the factory color balance target
set with SIM 63-11. 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 63-8 to set the
color balance to the factory color balance target.
C
User color
balance (gamma)
target
balance (gamma)
target
Same 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.
(gamma) target When the service color balance
target is changed, this color balance target is
also changed accordingly.
MX-7500N ADJUSTMENTS AND SETTINGS 5 – 32
Relationship between the factory target and the service target and the color balance target for the user color balance adjustment in
the copy color balance adjustment (Automatic adjustment) (SIM 46-74/46-24)
the copy color balance adjustment (Automatic adjustment) (SIM 46-74/46-24)
Factory target in the copy color balance adjustment (SIM 46-74/46-24)
By use of SIM 63-11, 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)
By use of SIM 63-11, 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 ((Automatic adjustment) SIM 46-74/46-24).
For the service color balance target, an optional color balance can
be adjusted with SIM 46-21 and registered with SIM 63-7. When,
however, SIM 63-8 is executed, the color balance is set to the
same balance as the factory color balance target set with SIM 63-
11.
ment ((Automatic adjustment) SIM 46-74/46-24).
For the service color balance target, an optional color balance can
be adjusted with SIM 46-21 and registered with SIM 63-7. When,
however, SIM 63-8 is executed, the color balance is set to the
same balance as the factory color balance target set with SIM 63-
11.
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 (Automatic adjustment) (SIM
46-74/46-24). When, therefore, the service color balance target is
changed, this target is also changed accordingly.
This color balance is same as the service color balance target in
the copy color balance adjustment (Automatic adjustment) (SIM
46-74/46-24). 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 46-21.
If the color balance is not customized, this procedure is not
required.
After completion of the customized color balance adjustment (Man-
ual) with SIM 46-21 according to the user's request, use SIM 63-7
to register the service color balance target data by using adjust-
ment pattern that was printed in this mode.
the purpose of registration
This procedure must be executed only when the color balance is
customized with SIM 46-21.
If the color balance is not customized, this procedure is not
required.
After completion of the customized color balance adjustment (Man-
ual) with SIM 46-21 according to the user's request, use SIM 63-7
to register the service color balance target data by using adjust-
ment pattern that was printed in this mode.
CAUTION: In this case, be sure to use A4 or 11" x 8.5" paper for
printing the adjustment pattern by SIM 46-21.
By this procedure, the service color balance target is
revised.
By this procedure, the service color balance target is
revised.
Use SIM 63-11 to select one of the three
kinds of color balance targets.
kinds of color balance targets.
Factory color balance
target (DEF1)
target (DEF1)
Factory color balance
target (DEF2)
target (DEF2)
Factory color balance
target (DEF3)
target (DEF3)
Color balance target in the copy color balance
automatic adjustment (SIM 46-24)
automatic adjustment (SIM 46-24)
Factory color balance
target (one of DEF1 - 3)
target (one of DEF1 - 3)
Execute SIM 63-8.
(The service color balance target is the
same as the factory color balance target.)
(The service color balance target is the
same as the factory color balance target.)
Factory setting
Factory color balance
target (DEF1)
target (DEF1)
=
=
Color balance target in the user color balance adjustment
Color balance target for
the user color balance
adjustment
the user color balance
adjustment
Service color balance
target
target
Service color balance
target
target
Service color balance
target
target
Service color balance
target (Unique)
target (Unique)
=
Factory color balance
target
(one of DEF1 - 3)
target
(one of DEF1 - 3)
Use SIM 46-21 to adjust the optional color
balance, and use SIM 63-7 to register it.
balance, and use SIM 63-7 to register it.
DEF1
DEF1
Item
Content
Default
DEF2
DEF3
Factory color balance target (DEF3) =
Service color balance target/Color balance
target for the user color balance adjustment
Service color balance target/Color balance
target for the user color balance adjustment
The engine color balance adjustment target in the automatic color balance
operation is slightly shifted to Magenta. When this target is selected, the
color balance is converted into natural gray color balance by the color
correction table in an actual copy mode and print is made.
operation is slightly shifted to Magenta. When this target is selected, the
color balance is converted into natural gray color balance by the color
correction table in an actual copy mode and print is made.
The engine color balance adjustment target in the automatic color balance
operation is slightly shifted to natural gray color balance. When this target
is selected, the color balance is slightly shifted to Cyan by the color
correction table in an actual copy mode and print is made.
operation is slightly shifted to natural gray color balance. When this target
is selected, the color balance is slightly shifted to Cyan by the color
correction table in an actual copy mode and print is made.
The engine color balance adjustment target in the automatic color balance
operation is slightly shifted to Cyan. When this target is selected, the color
balance is converted into the color balance with enhanced Cyan by the
color correction table in an actual copy mode and print is made.
operation is slightly shifted to Cyan. When this target is selected, the color
balance is converted into the color balance with enhanced Cyan by the
color correction table in an actual copy mode and print is made.
SIM63-8
SIM63-8
SIM63-8
Factory color balance target (DEF2) =
Service color balance target/Color balance
target for the user color balance adjustment
Service color balance target/Color balance
target for the user color balance adjustment
Factory color balance target
(DEF1) = Service color balance
target/Color balance target for the
user color balance adjustment
(DEF1) = Service color balance
target/Color balance target for the
user color balance adjustment
Hue
+b* Direction of Yellow
Direction of Blue
(A)
Factory color balance target
(DEF2)
(DEF2)
Factory color balance target
(DEF1)
(DEF1)
Direction
of Red
of Red
Factory color balance target
(DEF3)
(DEF3)
Direction
of Green
of Green
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