Sharp AR-BC260 Service Manual page 103

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
8) Check the latter part of the A3 copy paper for any color shift in
the paper transport direction.
Lead edge
Y
M
C
K
If there is any color shift, change and adjust SIM 48-6 FSM (L)
(Fuser 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.
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.
This is because paper squeezed by the transfer roller and the
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.
ADJ 4B Image registration adjustment
(Manual adjustment)
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.
Check visually and use the highest-density area of each color
as the center, and regard it as the reading value of shift.
Rough adjustment Check that the rough adjustment print
print pattern check: pattern is at the center for the rough
adjustment reference pattern.
Fine adjustment Check that the fine adjustment print
print pattern check: pattern is at the center for the fine
adjustment reference pattern.
(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.)
If the above condition is not satisfied, change the adjustment
value and tray again.
YMCK all color mode
Rear edge
AR-BC260 SETTING AND ADJUSTMENTS 8 - 10
5) Select the color mode adjustment item to be adjusted with the
scroll key. Change the adjustment value and to adjust.
Display Adjustment item
A MAIN- Main scanning direction
REGIST C image registration adjustment
value
B SUB- Sub scanning direction image
REGIST C registration adjustment value
C MAIN- Main scanning direction
REGIST M image registration adjustment
value
D SUB- Sub scanning direction image
REGIST M registration adjustment value
E MAIN- Main scanning direction
REGIST Y image registration adjustment
value
F SUB- Sub scanning direction image
REGIST Y registration adjustment value
When the adjustment value is changed by 1, the image posi-
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
7) Check the latter part of the A3 copy paper for any color shift in
the paper transport direction.
Lead edge
Y
M
C
K
If there is any color shift, change and adjust SIM 48-6 FSM (Fuser
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.
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.
This is because paper squeezed by the transfer roller and the
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.
Set Default
range value
Cyan 12 to 88 50
Cyan 1 to 132
Magenta 12 to 88
Magenta 1 to 132
Yellow 12 to 88
Yellow 1 to 132
YMCK all color mode
Rear edge