Sharp MX-M623U / MX-M753U (serv.man10) Service Manual ▷ View online
MX-M753N ADJUSTMENTS AND SETTINGS 5 – 32
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 46-24 is used to adjust the copy density and grada-
tion automatically, 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 - Q (MAX) to a same level collectively.
Then, adjust each patch density and gradation individually.
This is an efficient way of adjustment.
The adjustment value is set in the range of 245 - 755 (1 - 999).
When SIM 46-24 is used to adjust the copy density and grada-
tion automatically, 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 - Q (MAX) to a same level collectively.
Then, adjust each patch density and gradation individually.
This is an efficient way of adjustment.
6)
Cancel SIM 46-16.
7)
Check the copy density and gradation.
The copy density and gradation check must be performed in
the Text/Printed Photo mode. (For details of the density and
gradation check procedures, refer to page 5-24, 25.)
The copy density and gradation check must be performed in
the Text/Printed Photo mode. (For details of the density and
gradation check procedures, refer to page 5-24, 25.)
As needed, copy a user document and check the adjustment result.
If the copy density and gradation are not adjusted to the specified
level, there may be another cause.
Troubleshoot the cause, and repair or perform proper treatments,
and try all the procedures of the print image adjustment from the
beginning.
If the copy density and gradation are not adjusted to the specified
level, there may be another cause.
Troubleshoot the cause, and repair or perform proper treatments,
and try all the procedures of the print image adjustment from the
beginning.
11-C
Copy density and gradation adjustment
(Each copy mode) (Whole adjustment)
(Normally unnecessary to adjust)
(Each copy mode) (Whole adjustment)
(Normally unnecessary to adjust)
The density and gradation are adjusted in each copy mode individ-
ually.
Normally individual adjustments are not required. When there is a
request from the user, execute this adjustment.
1)
ually.
Normally individual adjustments are not required. When there is a
request from the user, execute this adjustment.
1)
Enter the SIM 46-2 mode.
2)
Select the copy mode to be adjusted with the scroll key.
3)
Enter the adjustment value with 10-key and press [OK] key.
When adjusting the copy density on the low density part, select
"LOW" mode and change the adjustment value. When adjust-
ing the copy density on the high density part, select "HIGH"
mode and change the adjustment value.
When the adjustment value is increased, the copy density is
increased. When the adjustment value is decreased, the copy
density is decreased.
When adjusting the copy density on the low density part, select
"LOW" mode and change the adjustment value. When adjust-
ing the copy density on the high density part, select "HIGH"
mode and change the adjustment value.
When the adjustment value is increased, the copy density is
increased. When the adjustment value is decreased, the copy
density is decreased.
4)
Cancel SIM 46-2.
5)
Check the copy density and gradation.
The copy density and gradation check must be performed in
the Text/Printed Photo mode. (For details of the density and
gradation check procedures, refer to page 5-24, 25.)
The copy density and gradation check must be performed in
the Text/Printed Photo mode. (For details of the density and
gradation check procedures, refer to page 5-24, 25.)
11-D
Manual copy density and gradation
adjustment for each copy mode
(Normally unnecessary to adjust)
adjustment for each copy mode
(Normally unnecessary to adjust)
This is to adjust the density in each copy mode. Normally individual
adjustments are not required. This adjustment is executed when
there is a request from the user.
1)
adjustments are not required. This adjustment is executed when
there is a request from the user.
1)
Enter the SIM 46-10 mode.
2)
Select the copy mode to be adjusted with the mode key.
3)
Select the density level (point) to be adjusted with the scroll
key.
key.
4)
Enter the adjustment value with 10-key and press [OK] key.
When the adjustment value is increased, the density is
increased. When the adjustment value is decreased, the den-
sity is decreased.
When the arrow key is pressed, the densities are collectively
adjusted.
That is, all the density levels (points) from the low density point
to the high density point can be adjusted collectively.
When [EXECUTE] key is pressed, the adjustment pattern is
printed out.
When the adjustment value is increased, the density is
increased. When the adjustment value is decreased, the den-
sity is decreased.
When the arrow key is pressed, the densities are collectively
adjusted.
That is, all the density levels (points) from the low density point
to the high density point can be adjusted collectively.
When [EXECUTE] key is pressed, the adjustment pattern is
printed out.
Item/Display
Content
Setting
range
Default
value
A
AUTO1
Auto 1
LOW
1 - 99
50
HIGH
1 - 99
50
B
AUTO2
Auto 2
LOW
1 - 99
50
HIGH
1 - 99
50
C
TEXT
Text
LOW
1 - 99
50
HIGH
1 - 99
50
D
TEXT/PRINTED
PHOTO
PHOTO
Text/Printed Photo
LOW
1 - 99
50
HIGH
1 - 99
50
E
TEXT/PHOTO
Text/Photograph
LOW
1 - 99
50
HIGH
1 - 99
50
F
PRINTED PHOTO
Printed Photo
LOW
1 - 99
50
HIGH
1 - 99
50
G
PHOTOGRAPH
Photograph
LOW
1 - 99
50
HIGH
1 - 99
50
H
MAP
Map
LOW
1 - 99
50
HIGH
1 - 99
50
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Item/Display
Density level (Point)
Adjustment
value range
value range
Default value
A
POINT1
Point 1
245 - 755
500
B
POINT2
Point 2
245 - 755
500
C
POINT3
Point 3
245 - 755
500
D
POINT4
Point 4
245 - 755
500
E
POINT5
Point 5
245 - 755
500
F
POINT6
Point 6
245 - 755
500
G
POINT7
Point 7
245 - 755
500
H
POINT8
Point 8
245 - 755
500
I
POINT9
Point 9
245 - 755
500
J
POINT10
Point 10
245 - 755
500
K
POINT11
Point 11
245 - 755
500
L
POINT12
Point 12
245 - 755
500
M
POINT13
Point 13
245 - 755
500
N
POINT14
Point 14
245 - 755
500
O
POINT15
Point 15
245 - 755
500
P
POINT16
Point 16
245 - 755
500
Q
POINT17
Point 17
245 - 755
500
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MX-M753N ADJUSTMENTS AND SETTINGS 5 – 33
A4R (11" x 8.5"R) paper is selected by priority. If there is no
A4R (11" x 8.5"R) paper, A3 (11" x 17") paper is selected.
The density at each density level (point) can be checked by
referring to this adjustment pattern. However, it is more practi-
cally to make a copy and check it.
A4R (11" x 8.5"R) paper, A3 (11" x 17") paper is selected.
The density at each density level (point) can be checked by
referring to this adjustment pattern. However, it is more practi-
cally to make a copy and check it.
5)
Cancel SIM 46-10.
6)
Check the copy density and gradation.
The copy density and gradation check must be performed in
the Text/Printed Photo mode. (For details of the density and
gradation check procedures, refer to page 5-24, 25.)
The copy density and gradation check must be performed in
the Text/Printed Photo mode. (For details of the density and
gradation check procedures, refer to page 5-24, 25.)
11-E
Document background density
reproducibility adjustment in the auto copy
mode (Normally unnecessary to adjust)
reproducibility adjustment in the auto copy
mode (Normally unnecessary to adjust)
Use for the reproducibility adjustment of document background
density in auto copy mode.
When there is a desire not to reproduce the background of the doc-
ument. When there is a desire to reproduce the low density image
of the document.
1)
density in auto copy mode.
When there is a desire not to reproduce the background of the doc-
ument. When there is a desire to reproduce the low density image
of the document.
1)
Enter the SIM 46-32 mode.
2)
Select the adjustment mode with the scroll key.
3)
Enter the adjustment value with 10-key, and press [OK] key.
When the adjustment value is increased, reproducibility of the
background and the low density image is increased. When the
adjustment value is decreased, reproducibility of the back-
ground and the low density image is decreased.
When the adjustment value is increased, reproducibility of the
background and the low density image is increased. When the
adjustment value is decreased, reproducibility of the back-
ground and the low density image is decreased.
(DSPF)
4)
Cancel SIM 46-32.
5)
Check the copy density and gradation.
11-F
Color document reproducibility adjustment
in the copy mode
(Normally unnecessary to adjust)
in the copy mode
(Normally unnecessary to adjust)
Use to adjust the reproducibility of the red image and the yellow
image when copying a color document that includes the red/yellow
images.
1)
image when copying a color document that includes the red/yellow
images.
1)
Enter the SIM 46-37 mode.
2)
Select the mode to be adjusted with the scroll key.
3)
Enter the adjustment value with 10-key, and press [OK] key.
When [DEFAULT] key is pressed, the values are set to the ini-
tial values (Default).
When the adjustment value of the adjustment item A is
increased, the copy density of red images is decreased. When
the adjustment value is decreased, the density is increased.
When the adjustment value of the adjustment item B is
increased, the copy density of yellow images is increased.
When the adjustment value is decreased, the density in also
decreased.
When [DEFAULT] key is pressed, the values are set to the ini-
tial values (Default).
When the adjustment value of the adjustment item A is
increased, the copy density of red images is decreased. When
the adjustment value is decreased, the density is increased.
When the adjustment value of the adjustment item B is
increased, the copy density of yellow images is increased.
When the adjustment value is decreased, the density in also
decreased.
4)
Cancel SIM 46-37.
5)
Check the copy density and gradation.
The copy density and gradation check must be performed in
the Text/Printed Photo mode. (For details of the density and
gradation check procedures, refer to page 5-24, 25.)
The copy density and gradation check must be performed in
the Text/Printed Photo mode. (For details of the density and
gradation check procedures, refer to page 5-24, 25.)
11-G
Manual copy density and gradation
adjustment (DSPF mode)
(Individual adjustment of the low density
area and the high density area)
adjustment (DSPF mode)
(Individual adjustment of the low density
area and the high density area)
It is normally not necessary to perform this adjustment. In the fol-
lowing cases, however, this adjustment must be performed.
* When the copy density differs in the DSPF mode and in the doc-
lowing cases, however, this adjustment must be performed.
* When the copy density differs in the DSPF mode and in the doc-
ument table mode.
* When the copy density differs on the front surface and on the
back surface in the DSPF mode.
* When the copy density in the DSPF mode is too low or too high.
* When the DSPF unit is replaced.
* When the DSPF unit is disassembled.
* When the DSPF CCD unit is replaced.
* When the DSPF unit is replaced.
* When the DSPF unit is disassembled.
* When the DSPF CCD unit is replaced.
Item/Display
Content
Setting
range
Default
value
A
COPY: OC
Copy mode (OC mode)
1 - 250
196
B
COPY: DSPF
(SIDE1)
(SIDE1)
Copy mode
(DSPF front surface mode)
(DSPF front surface mode)
1 - 250
196
C
COPY: DSPF
(SIDE2)
(SIDE2)
Copy mode
(DSPF back surface mode)
(DSPF back surface mode)
1 - 250
196
D
SCAN: OC
Scanner mode (OC mode)
1 - 250
196
E
SCAN: DSPF
(SIDE1)
(SIDE1)
Scanner mode
(DSPF front surface mode)
(DSPF front surface mode)
1 - 250
196
F
SCAN: DSPF
(SIDE2)
(SIDE2)
Scanner mode
(DSPF back surface mode)
(DSPF back surface mode)
1 - 250
196
G
FAX: OC
FAX mode (OC mode)
1 - 250
196
H
FAX: DSPF
(SIDE1)
(SIDE1)
FAX mode
(DSPF front surface mode)
(DSPF front surface mode)
1 - 250
196
I
FAX: DSPF
(SIDE2)
(SIDE2)
FAX mode
(DSPF back surface mode)
(DSPF back surface mode)
1 - 250
196
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2.
Item/Display
Content
Setting range
Default value
A
R-Ratio
Gray making setting (R)
0 - 1000
172
B
G-Ratio
Gray making setting (G)
0 - 1000
828
(B-Ratio: 0)
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MX-M753N ADJUSTMENTS AND SETTINGS 5 – 34
a. Adjustment procedures
(Front surface copy density adjustment)
1)
1)
Enter the SIM 46-9 mode.
2)
Press [OC] key to select the front surface copy density adjust-
ment mode.
ment mode.
3)
Select an adjustment mode with the scroll key.
To adjust the density in the low density area, select "COPY
SIDE A LOW." To adjust the density in the high density area,
select "COPY SIDE A HIGH."
To adjust the density in the low density area, select "COPY
SIDE A LOW." To adjust the density in the high density area,
select "COPY SIDE A HIGH."
4)
Enter the adjustment value with 10-key, and press [OK] key.
To increase the density, enter a greater number. To decrease
the density, enter a smaller number.
To increase the density, enter a greater number. To decrease
the density, enter a smaller number.
5)
Cancel SIM 46-9.
6)
Check the copy density and gradation.
The copy density and gradation check must be performed in
the Text/Printed Photo mode. (For details of the density and
gradation check procedures, refer to page 5-24, 25.)
The copy density and gradation check must be performed in
the Text/Printed Photo mode. (For details of the density and
gradation check procedures, refer to page 5-24, 25.)
(Back surface copy density adjustment)
1)
Enter the SIM46-9 mode.
2)
Press [DSPF] key to select the back surface copy density
adjustment mode.
adjustment mode.
3)
Select an adjustment mode with the scroll key.
To adjust the density in the low density area, select "COPY
SIDE B LOW." To adjust the density in the high density area,
select "COPY SIDE B HIGH."
To adjust the density in the low density area, select "COPY
SIDE B LOW." To adjust the density in the high density area,
select "COPY SIDE B HIGH."
Item
Key
Display
Content
Setting
range
Default
value
A
OC
COPY
SIDEA:
LOW
SIDEA:
LOW
DSPF copy mode
exposure adjustment
(Low density side)
exposure adjustment
(Low density side)
1 - 99
47
B
SCAN
SIDEA:
LOW
SIDEA:
LOW
DSPF scanner mode
exposure adjustment
(Low density side)
exposure adjustment
(Low density side)
1 - 99
47
C
FAX SIDEA:
LOW
LOW
DSPF FAX mode
exposure adjustment
(Low density side)
exposure adjustment
(Low density side)
1 - 99
47
D
COPY
SIDEA:
HIGH
SIDEA:
HIGH
DSPF copy mode
exposure adjustment
(High density side)
exposure adjustment
(High density side)
1 - 99
52
E
SCAN
SIDEA:
HIGH
SIDEA:
HIGH
DSPF scanner mode
exposure adjustment
(High density side)
exposure adjustment
(High density side)
1 - 99
52
F
FAX SIDEA:
HIGH
HIGH
DSPF FAX mode
exposure adjustment
(High density)
exposure adjustment
(High density)
1 - 99
52
A
DSPF
COPY
SIDEB:
LOW
SIDEB:
LOW
DSPF copy mode
exposure adjustment
(Low density side)
exposure adjustment
(Low density side)
1 - 99
47
B
SCAN
SIDEB:
LOW
SIDEB:
LOW
DSPF scanner mode
exposure adjustment
(Low density side)
exposure adjustment
(Low density side)
1 - 99
47
C
FAX SIDEB:
LOW
LOW
DSPF FAX mode
exposure adjustment
(Low density side)
exposure adjustment
(Low density side)
1 - 99
47
D
COPY
SIDEB:
HIGH
SIDEB:
HIGH
DSPF copy mode
exposure adjustment
(High density side)
exposure adjustment
(High density side)
1 - 99
50
E
SCAN
SIDEB:
HIGH
SIDEB:
HIGH
DSPF scanner mode
exposure adjustment
(High density side)
exposure adjustment
(High density side)
1 - 99
50
F
FAX SIDEB:
HIGH
HIGH
DSPF FAX mode
exposure adjustment
(High density)
exposure adjustment
(High density)
1 - 99
50
G
BALANCE
SIDEB: R
SIDEB: R
DSPF color balance
R
R
1 - 99
50
H
BALANCE
SIDEB: G
SIDEB: G
DSPF color balance
G
G
1 - 99
50
I
BALANCE
SIDEB: B
SIDEB: B
DSPF color balance
B
B
1 - 99
50
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Item
Key
Display
Content
Setting
range
Default
value
A
OC
COPY
SIDEA:
LOW
SIDEA:
LOW
DSPF copy mode
exposure adjustment
(Low density side)
exposure adjustment
(Low density side)
1 - 99
47
B
SCAN
SIDEA:
LOW
SIDEA:
LOW
DSPF scanner mode
exposure adjustment
(Low density side)
exposure adjustment
(Low density side)
1 - 99
47
C
FAX SIDEA:
LOW
LOW
DSPF FAX mode
exposure adjustment
(Low density side)
exposure adjustment
(Low density side)
1 - 99
47
D
COPY
SIDEA:
HIGH
SIDEA:
HIGH
DSPF copy mode
exposure adjustment
(High density side)
exposure adjustment
(High density side)
1 - 99
52
E
SCAN
SIDEA:
HIGH
SIDEA:
HIGH
DSPF scanner mode
exposure adjustment
(High density side)
exposure adjustment
(High density side)
1 - 99
52
F
FAX SIDEA:
HIGH
HIGH
DSPF FAX mode
exposure adjustment
(High density)
exposure adjustment
(High density)
1 - 99
52
A
DSPF
COPY
SIDEB:
LOW
SIDEB:
LOW
DSPF copy mode
exposure adjustment
(Low density side)
exposure adjustment
(Low density side)
1 - 99
47
B
SCAN
SIDEB:
LOW
SIDEB:
LOW
DSPF scanner mode
exposure adjustment
(Low density side)
exposure adjustment
(Low density side)
1 - 99
47
C
FAX SIDEB:
LOW
LOW
DSPF FAX mode
exposure adjustment
(Low density side)
exposure adjustment
(Low density side)
1 - 99
47
D
COPY
SIDEB:
HIGH
SIDEB:
HIGH
DSPF copy mode
exposure adjustment
(High density side)
exposure adjustment
(High density side)
1 - 99
50
E
SCAN
SIDEB:
HIGH
SIDEB:
HIGH
DSPF scanner mode
exposure adjustment
(High density side)
exposure adjustment
(High density side)
1 - 99
50
F
FAX SIDEB:
HIGH
HIGH
DSPF FAX mode
exposure adjustment
(High density)
exposure adjustment
(High density)
1 - 99
50
G
BALANCE
SIDEB: R
SIDEB: R
DSPF color balance
R
R
1 - 99
50
H
BALANCE
SIDEB: G
SIDEB: G
DSPF color balance
G
G
1 - 99
50
I
BALANCE
SIDEB: B
SIDEB: B
DSPF color balance
B
B
1 - 99
50
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MX-M753N ADJUSTMENTS AND SETTINGS 5 – 35
4)
Enter the adjustment value with 10-key, and press [OK] key.
To increase the density, enter a greater number. To decrease
the density, enter a smaller number.
To increase the density, enter a greater number. To decrease
the density, enter a smaller number.
5)
Cancel SIM 46-9.
6)
Check the copy density and gradation.
The copy density and gradation check must be performed in
the Text/Printed Photo mode. (For details of the density and
gradation check procedures, refer to page 5-24, 25.)
The copy density and gradation check must be performed in
the Text/Printed Photo mode. (For details of the density and
gradation check procedures, refer to page 5-24, 25.)
11-H
Automatic copy density and gradation
adjustment by the user (ENABLE/DISABLE
setting and adjustment of the automatic
copy density and gradation adjustment)
adjustment by the user (ENABLE/DISABLE
setting and adjustment of the automatic
copy density and gradation adjustment)
a. General
In the user program mode, the user can execute the automatic
adjustment of the copy density and gradation.
This adjustment is to set Enable/Disable of the above user opera-
tion with SIM 26-53.
In the user program mode, the user can execute the automatic
adjustment of the copy density and gradation.
This adjustment is to set Enable/Disable of the above user opera-
tion with SIM 26-53.
NOTE: This setting must be set to ENABLE only when the user's
understanding on the automatic adjustment of the copy
density and gradation as well as the user's operational abil-
ity is judged enough to execute the adjustment.
When set to enable, operation procedures must be fully
explained to the user.
density and gradation as well as the user's operational abil-
ity is judged enough to execute the adjustment.
When set to enable, operation procedures must be fully
explained to the user.
b. Setting procedure
1)
1)
Enter the SIM 26-53 mode.
2)
Select ENABLE or DISABLE with 10-key.
When disabling, set to "0" (NO). When enabling, set to "1"
(Yes).
When disabling, set to "0" (NO). When enabling, set to "1"
(Yes).
3)
Press [OK] key.
When this is set to DISABLE, the menu of the automatic adjust-
ment of the user copy density and gradation is not displayed in the
user program mode.
(Automatic adjustment of the copy density and gradation)
1)
ment of the user copy density and gradation is not displayed in the
user program mode.
(Automatic adjustment of the copy density and gradation)
1)
Enter the system setting mode.
2)
Enter the copy setting mode.
3)
Press the auto calibration key.
4)
Press [EXECUTE] key.
The patch image (adjustment pattern) is printed out.
A4R (11" x 8.5"R) paper is selected by priority. If there is no
A4R (11" x 8.5"R) paper, A3 (11" x 17") paper is selected.
The patch image (adjustment pattern) is printed out.
A4R (11" x 8.5"R) paper is selected by priority. If there is no
A4R (11" x 8.5"R) paper, A3 (11" x 17") paper is selected.
5)
Set the patch image (adjustment pattern) printed in procedure
4) on the document table.
Set the patch image so that the light density area is on the left
side.
Place the adjustment pattern on the document table so that the
adjustment pattern patch faces in the sub scanning direction.
At that time, place 5 sheets of white paper on the above patch
image (adjustment pattern).
4) on the document table.
Set the patch image so that the light density area is on the left
side.
Place the adjustment pattern on the document table so that the
adjustment pattern patch faces in the sub scanning direction.
At that time, place 5 sheets of white paper on the above patch
image (adjustment pattern).
6)
Press [EXECUTE] key.
The copy and the printer density and gradation adjustment is
automatically executed. After completion of the adjustment,
the display returns to the original operation screen.
The copy and the printer density and gradation adjustment is
automatically executed. After completion of the adjustment,
the display returns to the original operation screen.
ADJ 12
Printer density and gradation
adjustment
adjustment
This adjustment is needed in the following situations:
* When a consumable part (developer, OPC drum, transfer belt) is
* When a consumable part (developer, OPC drum, transfer belt) is
replaced.
* The CCD unit has been replaced.
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* U2 trouble has occurred.
* When the MFP PWB is replaced.
* When the EEPROM on the MFP PWB is replaced.
* When installing (as needed)
* When a repair, an inspection, or a maintenance is performed.
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* U2 trouble has occurred.
* When the MFP PWB is replaced.
* When the EEPROM on the MFP PWB is replaced.
* When installing (as needed)
* When a repair, an inspection, or a maintenance is performed.
12-A
Automatic adjustment of printer density
and gradation
and gradation
a. General
The automatic printer density and gradation adjustment is used to
adjust the printer density and gradation automatically by SIM67-24
or the user program.
(When this adjustment is executed, all the printer densities and gra-
dation adjustments of all the print modes are revised.)
There are following two modes in the automatic adjustment.
1)
The automatic printer density and gradation adjustment is used to
adjust the printer density and gradation automatically by SIM67-24
or the user program.
(When this adjustment is executed, all the printer densities and gra-
dation adjustments of all the print modes are revised.)
There are following two modes in the automatic adjustment.
1)
Automatic adjustment by the serviceman (SIM 67-24 is used.)
2)
Automatic adjustment by the user (The user program mode is
used.)
The automatic adjustment by the user is provided to reduce
the number of service calls.
It is used by the user to reset the printer density and gradation
to the normal levels when any trouble occurs in the printer den-
sity and gradation for some reasons.
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 automatic adjustment by the service-
man functions to recover the normal printer density and grada-
tion though the machine environment is greatly changed.
If the machine has a fatal problem, repair and adjust it for
obtaining the normal printer density and gradation.
To perform the adjustment, the above difference must be fully
understood.
used.)
The automatic adjustment by the user is provided to reduce
the number of service calls.
It is used by the user to reset the printer density and gradation
to the normal levels when any trouble occurs in the printer den-
sity and gradation for some reasons.
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 automatic adjustment by the service-
man functions to recover the normal printer density and grada-
tion though the machine environment is greatly changed.
If the machine has a fatal problem, repair and adjust it for
obtaining the normal printer density and gradation.
To perform the adjustment, the above difference must be fully
understood.
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Thin line
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