Read Sharp AR-280 (serv.man11) Service Manual online
2) Cut the paper along the lead edge of the scale image.
3) Place the scale on the document table as shown below.
Place the scale at the center along the document guide as
shown below.
shown below.
4) Execute SIM 50-2.
5) Set IMAGE LOSS and DEN-A to 20.
6) Set L1, L2, and L3 to 0.
7) Make a copy at 400%. (Document table mode)
8) Measure the dimension of L1 and L2 of the scale copy image.
7) Enter the actual measurement value of distance L1 to L1 on the
operation panel in the unit of 0.1mm.
8) Enter the actual measurement value of distance L2 to L2 on the
operation panel in the unit of 0.1mm.
9) Set the document made in procedure 1) and procedure 2) on the
SPF and make a copy at 200%. (SPF mode)
10) Measure the dimension of L3 of the scale copy image.
11) Multiple the measured values (mm) with 10, and enter the prod-
ucts to L1, L2, and L3.
12) Set the copy magnification ratio to 100% and make a copy.
Change the set value of DEN-B and adjust the rear edge void
area.
area.
If the adjustment is incomplete or if a fine adjustment is required,
change the adjustment values.
change the adjustment values.
When the adjustment value is changed by 1, the following items
are changed on the copy by 0.1mm.
are changed on the copy by 0.1mm.
Code
Adjustment item
Adjustment
value
Note
A L1
Distance between the image lead
edge and 10mm of the scale
edge and 10mm of the scale
When the image
lead edge is varied
depending on the
copy magnification
ratio, change the set
value.
lead edge is varied
depending on the
copy magnification
ratio, change the set
value.
B L2
Distance between the paper lead
edge and the image lead edge
edge and the image lead edge
C L3
Distance between the image lead
edge and 10mm of the scale
(SPF mode)
edge and 10mm of the scale
(SPF mode)
When the image
lead edge is varied
depending on the
copy magnification
ratio, change the set
value.
lead edge is varied
depending on the
copy magnification
ratio, change the set
value.
D IMAGE
LOSS
Lead edge image
loss
loss
1.5 to
3.0mm
3.0mm
When the set value
is increased, the
image loss is
increased.
is increased, the
image loss is
increased.
E DEN-A Lead edge void area 1.5 to
3.0mm
When the set value
is increased, the
void area is
increased.
is increased, the
void area is
increased.
F DEN-B Rear edge void area 1.5 to
3.0mm
When the set value
is increased, the
void area is
increased.
is increased, the
void area is
increased.
100
110
120
130
150
140
10
20
90
30
80
70
60
50
40
Scale lead edge
Paper
Cut the paper along this line.
10
20
30 40 50 60 70
80 90
50 100 110 120 130 140
Scale
Paper (White paper)
10
20
30
40
50
L1
L2
Paper lead
edge
edge
400% enlargement copy
10
20
30
40
50
L3
L2
Paper lead
edge
edge
200% enlargement copy
7 – 13
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