Sharp MX-M1055 / MX-M1205 Service Manual ▷ View online
MX-M1205 ADJUSTMENTS 5 – 41
6)
Select a mode to be adjusted with the scroll button
7)
Enter the adjustment value with 10-key, and press [OK] button.
When the adjustment value is increased, the image loss
becomes greater. (Change rate for a change in the adjustment
value: 0.1mm/step)
becomes greater. (Change rate for a change in the adjustment
value: 0.1mm/step)
Repeat the above procedures until a satisfactory result is obtained.
Display/Item
Content
Setting range
Default
Image send
mode image
loss adjustment
(Except for copy
mode)
mode image
loss adjustment
(Except for copy
mode)
A
Image loss
quantity setting
OC
quantity setting
OC
LEAD_EDGE (OC)
OC lead edge image loss quantity setting
0-100
0 (0mm)
B
FRONT_REAR (OC)
OC side image loss quantity setting
0-100
0 (0mm)
C
TRAIL_EDGE (OC)
OC rear edge image loss quantity setting
0-100
0 (0mm)
D
Image loss
quantity setting
SPF SIDE1
quantity setting
SPF SIDE1
LEAD_EDGE (SPF_SIDE1)
Front surface lead edge image loss quantity setting
0-100
0 (0mm)
E
FRONT_REAR (SPF_SIDE1)
Front surface side image loss quantity setting
0-100
0 (0mm)
F
TRAIL_EDGE (SPF_SIDE1)
Front surface rear edge image loss quantity setting
0-100
0 (0mm)
G
Image loss
quantity setting
SPF SIDE2
quantity setting
SPF SIDE2
LEAD_EDGE (SPF_SIDE2)
Back surface lead edge image loss quantity setting
0-100
0 (0mm)
H
FRONT_REAR (SPF_SIDE2)
Back surface side image loss quantity setting
0-100
0 (0mm)
I
TRAIL_EDGE (SPF_SIDE2)
Back surface rear edge image loss quantity setting
0-100
0 (0mm)
MX-M1205 ADJUSTMENTS 5 – 42
ADJ 11
Gray balance/density
adjustment
adjustment
(1) Note before execution of the gray balance/density
adjustment
* Requisite conditions before execution of the gray balance/den-
sity adjustment
Before execution of the gray balance/density adjustment, check
to insure that the adjustments which affect the gray balance/den-
sity have been completed properly.
to insure that the adjustments which affect the gray balance/den-
sity have been completed properly.
(Though the following items affect the gray balance/density,
there is no need to adjust them frequently. When, however, a
trouble occurs, they must be checked and adjusted.)
there is no need to adjust them frequently. When, however, a
trouble occurs, they must be checked and adjusted.)
1)
The following items must be adjusted properly.
Note for the gray balance/density check and adjustments
When setting the adjustment pattern on the document table in the
automatic gray balance adjustment procedures, place 5 sheets of
white paper on the adjustment pattern in order to prevent back
copying and adverse effects of paper wrinkles as far as possible.
automatic gray balance adjustment procedures, place 5 sheets of
white paper on the adjustment pattern in order to prevent back
copying and adverse effects of paper wrinkles as far as possible.
(2) Relationship between the servicing job contents and the
gray balance/density check and adjustment
Note that the jobs before and after execution of the gray balance/
density check and adjustment depend on the machine status and
the servicing conditions.
density check and adjustment depend on the machine status and
the servicing conditions.
Follow the flowchart of the gray balance/density adjustment proce-
dures depending on the actual conditions.
dures depending on the actual conditions.
There are following four, major cases.
1)
When installing (When a printer option is installed)
2)
When a periodic maintenance is performed.
3)
When a repair, an inspection, or a maintenance is performed.
(When a consumable part is replaced.)
(When a consumable part is replaced.)
4)
When an installation, a repair, or inspection is performed.
(Without replacement of a consumable part)
(Without replacement of a consumable part)
(3) Copy gray balance and density check
NOTE: Before checking the copy gray balance and density, be
sure to execute the following jobs.
* Execute the high density image correction (Process correction)
forcibly. (SIM 44-6)
* Execute the half-tone image correction forcibly. (SIM 44-26)
Method 1
Make a copy of the gray test chart (UKOG-0162FCZZ), and check
that they are proper.
that they are proper.
Note for checking the density
To check the density, use the gray test chart (UKOG-0162FCZZ)
and the servicing color test chart (UKOG-0326FCZZ/UKOG-
0326FC11). Set the copy density level to "Manual 3" in the Text/
Printed Photo mode (Manual).
and the servicing color test chart (UKOG-0326FCZZ/UKOG-
0326FC11). Set the copy density level to "Manual 3" in the Text/
Printed Photo mode (Manual).
In addition, all the gray balance adjustments in the user adjustment
mode must be set to the default (center).
mode must be set to the default (center).
Check with the gray test chart (UKOG-0162FCZZ)
In the copy density check with the gray test chart, check to insure
the following conditions.
the following conditions.
Monochrome copy check items (Check to confirm the following:)
Job
No
Adjustment item
Simulation
ADJ
1
High voltage
values adjustment
values adjustment
ADJ
1A
Main charger grid
voltage adjustment
voltage adjustment
8-2
ADJ
1B
Developing bias voltage
adjustment
adjustment
8-1
ADJ
1C
Transfer current
adjustment
adjustment
8-6
ADJ
1D
Photoconductor dark
potential adjustment
potential adjustment
44-3
ADJ
2
Developing unit
adjustment
adjustment
ADJ
2A
Developing doctor gap
adjustment
adjustment
ADJ
2B
Developing roller main
pole position
adjustment
pole position
adjustment
ADJ
2C
Toner density control
reference value setting
reference value setting
25-2
(25-6)
ADJ
6
Scan image focus adjustment
48-1
ADJ
11
Gray balance/
density adjustment
density adjustment
ADJ
11A
Scanner calibration
(CCD calibration)
(CCD calibration)
63-3
1
2
3
4
5
6
7
8
9
10
W
SHARP GRAY CHART
SHARP gray chart
Patch 1 is not copied.
Patch 2 is
slightly copied.
slightly copied.
Patch 3 is copied.
(Black-and-white copy)
Display/Item
Adjustment items
1
There are 12 void areas.
Main machine
S/M
S/M
ADJ3-A to C
Sim50-28
2
The resolution of 5.0 (5 points) can be
seen.
seen.
Main machine
S/M
S/M
Check the dirtof the OC glass
Clean the OC glass
Clean the mirror of the scanner
ADJ11-D12
Clean the OC glass
Clean the mirror of the scanner
ADJ11-D12
Sim46-54
Copy gamma, gray balance adjustment for each
dither (Automatic adjustment)
Copy gamma, gray balance adjustment for each
dither (Automatic adjustment)
3
The color difference in gray balance
between the F and the sides is not so
great.
between the F and the sides is not so
great.
Main machine
S/M
S/M
Sim61-11
ADJ11-B
Sim46-74
Copy/Printer color balance and density adjustment
(Automatic adjustment) (Basic adjustment)
Copy/Printer color balance and density adjustment
(Automatic adjustment) (Basic adjustment)
4
There are no white and black streaks.
Clean the mirror of the LSU.
Clean the Main Charger
Clean the mirror of the scanner
Clean the Main Charger
Clean the mirror of the scanner
5
The background density is not so light.
Main machine
S/M
S/M
ADJ11-B
Sim46-74
Copy/Printer gray balance and density adjustment
(Automatic adjustment) (Basic adjustment)
Copy/Printer gray balance and density adjustment
(Automatic adjustment) (Basic adjustment)
6
The black low-density gradation is
copied slightly.
copied slightly.
Main machine
S/M
S/M
ADJ11-B
Sim46-74
Copy/Printer color balance and density adjustment
(Automatic adjustment) (Basic adjustment)
Copy/Printer color balance and density adjustment
(Automatic adjustment) (Basic adjustment)
MX-M1205 ADJUSTMENTS 5 – 43
MX-M1205 ADJUSTMENTS 5 – 44
(4) Printer gray balance/density check
NOTE: Before checking the copy gray 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.
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.
to the darker level. The density changing direction must not be
reversed.
11-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.
(1) Note before adjustment
• 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.
dirt and scratches.
If they are dirty, clean them.
If they are scratched or streaked, replace with new one.
(2) Adjustment procedures
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.
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.
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.
NOTE: Check to insure that the SIT chart (UKOG-0280FCZZ or
UKOG-0280FCZ1) is in close contact with the document
table.
table.
NOTE: UKOG-0280FCZZ is equivalent to UKOG-0280FCZ1.
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 Gray balance adjustment target setup
a. General
When the automatic gray balance adjustment is executed, a certain
gray balance (gamma) is used as the target.
gray balance (gamma) is used as the target.
There are following three kinds of the target.
• Factory gray balance (gamma) target
• Service gray balance (gamma) target
• User gray balance (gamma) target
In the above three, only the service gray balance target can be set
to a desired level.
to a desired level.
This setting is required in the following cases.
* When the gray balance and density adjustments are executed
manually (SIM46-16) (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 gray balance.
* When the service gray balance target gamma is judged as
improper.
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