Sharp AR-C260 (serv.man11) Service Manual ▷ View online
AR-C260/C260M SETTING AND ADJUSTMENTS 8 - 9
When the image pattern on the front frame side is skewed to the right
(arrow direction A) with the rear frame side as the reference, turn the
adjustment screw clockwise. When the image pattern is skewed to the
left (arrow direction B), turn the adjustment screw counterclockwise.
(arrow direction A) with the rear frame side as the reference, turn the
adjustment screw clockwise. When the image pattern is skewed to the
left (arrow direction B), turn the adjustment screw counterclockwise.
When the adjustment screw is turned 1/4 rotation, the image position is
shifted by one dot.
shifted by one dot.
Remark: The print engine image focus adjustment is performed by
changing the distance between the LED array unit and the
OPC drum.
OPC drum.
The print engine image skew adjustment is performed by
changing the parallelism of the LED array unit for the OPC
drum.
changing the parallelism of the LED array unit for the OPC
drum.
If either of the two adjustments is performed, it may affect the
other adjustment due to the machine structure.
other adjustment due to the machine structure.
After completion of the above procedures, check that both of
the above two adjustments are satisfied.
the above two adjustments are satisfied.
There are two methods of the image registration adjustment: the man-
ual adjustment and the automatic adjustment. Either of them uses the
simulation.
ual adjustment and the automatic adjustment. Either of them uses the
simulation.
This adjustment is required in the following cases:
• When the scanner (writing) unit is replaced.
• When the scanner (writing) unit is removed from the machine.
• When color image mis-resist is generated in the main scanning
direction.
• When color image mis-resist is generated in the sub scanning direc-
tion.
• When installation or the installing place is changed.
• When maintenance is performed. (When the OPC drum, the photo-
conductor cartridge, the transfer unit, or the transfer belt is replaced.)
• When U2 trouble occurs.
• When ICU PWB is replaced.
• When EEPROM on ICU PWB is replaced.
Remark: Though SIM 50-22 is not performed under the following con-
ditions, the image registration adjustment is performed auto-
matically.
matically.
∗
When the toner cartridge is replaced.
∗
At every 8,000 copies (total of print quantity and copy quantity)
(When 8,000 copies is reached during a job, the machine stops after
completion of the job.)
(When 8,000 copies is reached during a job, the machine stops after
completion of the job.)
If the set item AR of SIM 44-1 is set to OFF (Disable), the above oper-
ation is not performed.
ation is not performed.
After setting the image registration to the best by SIM 50-20, when the
image registration adjustment is automatically performed, the best-
adjusted condition may be varied. To avoid this, set the item AR of SIM
44-1 to OFF (Disable).
image registration adjustment is automatically performed, the best-
adjusted condition may be varied. To avoid this, set the item AR of SIM
44-1 to OFF (Disable).
Note:
Before executing this adjustment, check that the following adjustments
have been properly completed.
have been properly completed.
∗
Print engine image focus adjustment (Scanner (writing) unit)
∗
Print engine image skew adjustment (Scanner (writing) unit)
∗
Image registration sensor adjustment
This adjustment is used to perform the image registration adjustment in
the main scanning direction and in the sub scanning direction at the
same time with the simulation.
the main scanning direction and in the sub scanning direction at the
same time with the simulation.
1) Enter the SIM 50-22 mode.
SIM 50-22
2) Press the [EXECUTE] key.
The [EXECUTE] key is highlighted, and the image registration
automatic adjustment is started. After completion of the adjust-
ment, the [EXECUTE] key returns to the normal display.
automatic adjustment is started. After completion of the adjust-
ment, the [EXECUTE] key returns to the normal display.
The adjustment process status is indicated with (
∗
) mark. It takes
several minutes to complete the adjustment.
3) Enter the SIM 50-20 mode.
SIM 50-20
4) Select the A4 (11 x 8 1/2) size paper feed tray.
5) Press the [EXECUTE] key.
The image registration adjustment pattern is printed.
ADJ 4
Image registration adjustment
ADJ 4A
Image registration adjustment
(Auto adjustment)
(Auto adjustment)
AR-C260/C260M SETTING AND ADJUSTMENTS 8 - 10
• Image registration adjustment pattern
C1 = CYAN MAIN
C2 = CYAN SUB
M1 = MAGENTA MAIN
M2 = MAGENTA SUB
Y1 = YELLOW MAIN
Y2 = YELLOW SUB
6) Check the rough adjustment print pattern position and the fine
adjustment print pattern position of each color on the front and the
rear frame sides.
rear frame sides.
Check visually and use the highest-density area of each color as
the center, and regard it as the reading value of shift.
the center, and regard it as the reading value of shift.
(If the fine adjustment print pattern is in the range of 0 ± 2 for the
scale of the fine adjustment reference pattern, there is no need to
adjust.)
scale of the fine adjustment reference pattern, there is no need to
adjust.)
If the adjustment is not completed with a satisfactory result, try the
manual adjustment.
manual adjustment.
∗
A
∗
C
∗
A
∗
A
∗
A
∗
A
∗
A
∗
C
∗
C
∗
C
∗
C
∗
C
∗
A: Rough adjustment
pattern
∗
B: Fine adjustment
pattern
∗
C: Adjustment range
(0 ± 2)
Main scanning direction
image resist
image resist
Rough adjustment section
Fine adjustment section
Sub scanning
direction
adjustment pattern
direction
adjustment pattern
Main scanning
direction
adjustment pattern
direction
adjustment pattern
Yellow
section
section
Magenta
section
section
Sub scanning direction
image resist
image resist
Cyan
section
section
Main scanning direction
image resist
image resist
Sub scanning direction
image resist
image resist
Main scanning direction
image resist
image resist
Sub scanning direction
image resist
image resist
Rough adjustment
print pattern check:
print pattern check:
Check that the rough adjustment print pattern
is at the center for the rough adjustment ref-
erence pattern.
is at the center for the rough adjustment ref-
erence pattern.
Fine adjustment
print pattern check:
print pattern check:
Check that the fine adjustment print pattern is
at the center for the fine adjustment refer-
ence pattern.
at the center for the fine adjustment refer-
ence pattern.
AR-C260/C260M SETTING AND ADJUSTMENTS 8 - 11
1) Enter the SIM 50-20 mode.
SIM 50-20
2) Select the A4 (11 x 8 1/2) paper feed tray.
3) Press the [EXECUTE] key.
The image registration adjustment pattern is printed.
4) Check the rough adjustment print pattern position and the fine
adjustment print pattern position of each color on the front and the
rear frame sides.
rear frame sides.
Check visually and use the highest-density area of each color as
the center, and regard it as the reading value of shift.
the center, and regard it as the reading value of shift.
(If the fine adjustment print pattern is in the range of 0 ± 2 for the
scale of the fine adjustment reference pattern, there is no need to
adjust.)
scale of the fine adjustment reference pattern, there is no need to
adjust.)
If the above condition is not satisfied, change the adjustment value
and tray again.
and tray again.
5) Select the color mode adjustment item to be adjusted with the
scroll key. Change the adjustment value and to adjust.
When the adjustment value is changed by 1, the image position is
shifted by one pixel.
shifted by one pixel.
Main scanning direction image position adjustment (Print engine section)
(1) How to read the fine adjustment pattern
The highest-density area of the color is regarded as the center and as the reading value of the shift amount.
(The reading value in the figure below is 4.)
(The reading value in the figure below is 4.)
(2) How to read the rough adjustment pattern
Judge the polarity by checking that the color line is shifted to the positive or the negative side.
The scales are made with the black line at the center as 0, the first mark as 20, the second mark as 40, and the third mark as 60.
The interval between rough adjustment marks is 20.
(For an example shown in the figure below, it is between 20 and 40 on the positive side. Therefore, the reading value is 20.)
(For an example shown in the figure below, it is between 20 and 40 on the positive side. Therefore, the reading value is 20.)
(Example)
ADJ 4B
Image registration adjustment
(Manual adjustment)
(Manual adjustment)
Rough adjustment
print pattern check:
print pattern check:
Check that the rough adjustment print pattern
is at the center for the rough adjustment ref-
erence pattern.
is at the center for the rough adjustment ref-
erence pattern.
Fine adjustment
print pattern check:
print pattern check:
Check that the fine adjustment print pattern is
at the center for the fine adjustment refer-
ence pattern.
at the center for the fine adjustment refer-
ence pattern.
Display
Adjustment item
Set
range
Default
value
A
CYAN
MAIN
MAIN
Main scanning direction
image registration adjustment
value
image registration adjustment
value
Cyan
12 to 88
50
B
CYAN
SUB
SUB
Sub scanning direction image
registration adjustment value
registration adjustment value
Cyan
C
MAGENTA
MAIN
MAIN
Main scanning direction
image registration adjustment
value
image registration adjustment
value
Magenta
D
MAGENTA
SUB
SUB
Sub scanning direction image
registration adjustment value
registration adjustment value
Magenta
E
YELLOW
MAIN
MAIN
Main scanning direction
image registration adjustment
value
image registration adjustment
value
Yellow
F
YELLOW
SUB
SUB
Sub scanning direction image
registration adjustment value
registration adjustment value
Yellow
9
8
7
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
Target adjustment range
(–2 to 2)
60
-60
First mark
Second mark
Third mark
First mark
Second mark
Third mark
AR-C260/C260M SETTING AND ADJUSTMENTS 8 - 12
(3) How to calculate the adjustment value
New adjustment value = Current adjustment value + Rough adjustment
pattern reading value + Fine adjustment pattern reading value
pattern reading value + Fine adjustment pattern reading value
A: Current adjustment value
B: New adjustment value
X: Fine adjustment pattern reading value
Y: Rough adjustment pattern reading value
The polarity of the calculation differs depending on the polarity of the
adjustment pattern reading values. There are following four cases:
adjustment pattern reading values. There are following four cases:
1) When Y
≥
0, and X
≥
0:
B = A + X + Y
2) When Y
≥
0, and X < 0:
B = A + (X + 20) + Y
3) When Y < 0, and X
≥
0:
B = A + (X – 20) + Y
4) When Y < 0, and X < 0:
B = A + X + Y
Example
A: Providing that Current adjustment value = 48:
1) When Y
≥
0, and X
≥
0:
B = A + X + Y = 48 + (4) + (20) = 72
2) When Y
≥
0, and X < 0:
B = A + (X + 20) + Y = 48 + (– 6 + 20) + (20) = 82
3) When Y < 0, and X
≥
0:
B = A + (X – 20) + Y = 48 + (7 – 20) + (–20) = 15
4) When Y < 0, and X < 0:
B = A + X + Y = 48 + (–5) + (–20) = 23
9
8
7
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
60
-60
9
8
7
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
60
-60
9
8
7
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
60
-60
9
8
7
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
60
-60
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