Sharp AR-C262M (serv.man3) Service Manual ▷ View online
AR-C262M 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.
the 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.
as 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.)
the 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 reference pattern.
pattern is at the center for the rough
adjustment reference pattern.
Fine adjustment
print pattern check:
print pattern check:
Check that the fine adjustment print pat-
tern is at the center for the fine adjust-
ment reference pattern.
tern is at the center for the fine adjust-
ment reference pattern.
AR-C262M SETTING AND ADJUSTMENTS 8 - 11
7) Set SIM 64-1 as shown below, and make a self print of cross
pattern on A3 paper.
A: 1
B: 1 to 5
D: 1
YMCK all color mode
8) Check the latter part of the A3 copy paper for any color shift in
the paper transport direction.
If there is any color shift, change and adjust SIM 48-6 FSM (Fuser
roller speed) setup.
roller speed) setup.
When the paper transport speed in the transfer section differs from
that of the fusing roller, color shift is generated on the latter half of
paper.
that of the fusing roller, color shift is generated on the latter half of
paper.
Especially when the paper transport speed of the fusing roller is
greater than that in the transfer section, color shift is often gener-
ated on the latter half of paper.
greater than that in the transfer section, color shift is often gener-
ated on the latter half of paper.
This is because paper squeezed by the transfer roller and the
OPC drum is pulled by the fusing roller.
OPC drum is pulled by the fusing roller.
The longer the paper size is, the greater the difference is in the
paper transport speed between the fusing roller and the transfer
section, resulting in greater color shift.
paper transport speed between the fusing roller and the transfer
section, resulting in greater color shift.
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.
the 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.
as 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.)
the 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.
value 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 posi-
tion is shifted by one pixel.
tion is shifted by one pixel.
6) Set SIM 64-1 as shown below, and make a self print of cross
pattern on A3 paper.
A: 1
B: 1 to 5
D: 1
YMCK all color mode
7) Check the latter part of the A3 copy paper for any color shift in
the paper transport direction.
If there is any color shift, change and adjust SIM 48-6 FSM (Fuser
roller speed) setup.
roller speed) setup.
When the paper transport speed in the transfer section differs from
that of the fusing roller, color shift is generated on the latter half of
paper.
that of the fusing roller, color shift is generated on the latter half of
paper.
Especially when the paper transport speed of the fusing roller is
greater than that in the transfer section, color shift is often gener-
ated on the latter half of paper.
greater than that in the transfer section, color shift is often gener-
ated on the latter half of paper.
This is because paper squeezed by the transfer roller and the
OPC drum is pulled by the fusing roller.
OPC drum is pulled by the fusing roller.
The longer the paper size is, the greater the difference is in the
paper transport speed between the fusing roller and the transfer
section, resulting in greater color shift.
paper transport speed between the fusing roller and the transfer
section, resulting in greater color shift.
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 reference pattern.
pattern is at the center for the rough
adjustment reference pattern.
Fine adjustment
print pattern check:
print pattern check:
Check that the fine adjustment print pat-
tern is at the center for the fine adjust-
ment reference pattern.
tern is at the center for the fine adjust-
ment reference pattern.
Y
M
C
K
K
Lead edge
Rear edge
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 scanning direction
image registration
adjustment value
adjustment value
Cyan
1 to 132
C
MAGENTA
MAIN
MAIN
Main scanning direction
image registration
adjustment value
image registration
adjustment value
Magenta
12 to 88
D
MAGENTA
SUB
SUB
Sub scanning direction
image registration
adjustment value
image registration
adjustment value
Magenta
1 to 132
E
YELLOW
MAIN
MAIN
Main scanning direction
image registration
adjustment value
image registration
adjustment value
Yellow
12 to 88
F
YELLOW
SUB
SUB
Sub scanning direction
image registration
adjustment value
image registration
adjustment value
Yellow
1 to 132
Y
M
C
K
K
Lead edge
Rear edge
AR-C262M SETTING AND ADJUSTMENTS 8 - 12
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)
(3) How to calculate the adjustment value
New adjustment value = Current adjustment value + Rough
adjustment pattern reading value + Fine adjustment pattern read-
ing value
adjustment pattern reading value + Fine adjustment pattern read-
ing 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:
the 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
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
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
AR-C262M SETTING AND ADJUSTMENTS 8 - 13
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
Sub scanning direction image position/print area 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)
(3) How to calculate the adjustment value
New adjustment value = Current adjustment value + Rough
adjustment pattern reading value + Fine adjustment pattern read-
ing value
adjustment pattern reading value + Fine adjustment pattern read-
ing 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:
the 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
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
Target adjustment range
(–2 to 2)
60
-60
First mark
Second mark
Third mark
First mark
Second mark
Third mark
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