Sharp SF-2040 Service Manual page 98

•
L1: Lead edge deviation at 200% magnification
•
L2: Lead edge deviation at 100% magnification
•
RRC-A = 4.7222 x (L1 – L2)
•
RRC-B = 7.2202 x L2 – 3.6101 x L1
5 Using the ten keys, input the values of RRC-A and RRC-B given
by the expressions shown above. For input procedure see 3).
6 Take copies at 200%, 100% and 50% magnification and check
the deviation difference at each magnification is less than ap-
prox. 1 mm.
If the difference is larger than 1 mm, repeat step 3 to 6.
7 Take a 100% copy to check the image loss for 4 mm or less. If
the image loss is larger than 4 mm, change the content of
RRC-B so that the range of the image loss is 3 mm or less.
Note: The image loss value adjusted as described above is
the image loss value adjusted in Simulation 50-01,
and not the final value.
8 Set a scale and an A3-size(11" x 17") blank paper on the
original table as shown in the figure.
9 Operate the scrol display key to set to the void adjustment mode
of the LCD.
F Take a copy. Type a value for adjusting the end void area of the
full-size copy so that, measured with the scale image, the solid
edge is 1 ~ 4 mm away from the paper end.
→
The key operation
the input value. The input value of "1" corresponds to 0.2 mm in
void area. Larger input value provides larger void area.
Simulation No. 50-1
1. Lead edge image position adjustment
2. Lead edge image position adjustment (Calculation formula)
MFT RRC A: B:
CS RRC A: B:
→ PSW provide a copy and sets
VOID
F: R:
1 0 2 0
Image loss
0~3mm
10 20 30 40 50 60 70 80 90 50 100 110 120130 140
50mm
end void area
1~3mm
1 0
Paper end
7 – 16
50
3 0 4 0 6 0
Full-size(100%) copy
Scale
A3-size(11" x 17")
blank paper
Scale image
50
2 0 3 0 4 0
Solid edge
Full-size(100%) copy
7 0