Sharp AR-250, Service Manual

Page: 64 / 196

(7) Copy image position, image loss, void area
adjustment
Before performing this adjustment, check that SIM 50-5 is set to 50. If
not, set it to 50.
This adjustment uses SIM 50-2 and SIM 50-1.
The above two simulations are used in the following manner.
Sim 50-2: Rough adjustment
SIM 50-1: Fine adjustment
If the desired value is obtained by SIM 50-2, there is no need to
perform SIM 50-1.
(Adjustment items)
No. Adjustment item Operation mode
SIM 50-2 set
item
SIM 50-1 set
item
Adjustment
value
Note
1 Lead edge image loss Document
table mode SPF mode IMAGE LOSS IMAGE LOSS 1.5 to 3.0 mm
2 Lead edge void area Document
table mode SPF mode DEN-A DEN-A 1.5 to 3.0 mm
3 Rear edge image loss SPF mode REAR LOSS
(SPF) REAR LOSS
(SPF) 1.5 to 3.0 mm AR-4XX
series only
4 Rear edge void area Document
table mode SPF mode DEN-B DEN-B
5 Image reference position Document
table mode RRC-A
6 Paper timing Document
table mode SPF mode RRC-B
7 Image reference position SPF mode SPF
8 Distance between image lead edge
position and scale of 10mm
´
10
(Distance between image lead edge
position of back surface and scale of
10mm
´
10)
Document
table mode RSPF mode L1(L6), L4
9 Distance between paper lead edge
and image lead edge
´
10
Document
table mode RSPF mode L2, L5
10 Distance between image lead edge
position x scale of 10mm
´
10
SPF mode L3
Adjustment items 1
~
4 can be adjusted either with SIM 50-1 or SIM 50-2.
The adjustment values of items 8
~
10 will affect the adjustment items 5
~
7 automatically.
Therefore, adjusting the items 8
~
10 will lead to the same result as adjusting the items 5
~
7.
* L6 is the same as L1 for the back surface
*
Refer to "K. RSPF" for the adjustment of RSPF.
1) Place a scale on the document table as shown below, and
make a normal (100%) copy.
Note that the scale must be placed in parallel to the scanning
direction and that the scale lead edge must be clearly copied.
illust: AR-280
2) Process the copied paper as shown below.
Cut the copied paper along the line at the edge of the scale
image. The cut line and the scale image must form a right angle
(90 degrees).
Scale
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.
7/13/2000 6 – 14