Optical Section - Sharp SF-2314 Service Manual

2. Optical section

A. Adjustments list
Classification No.
Parts installation (1) Lens
position
(2)
Mirror
Copy picture quality (3) Image distortion adjustment
(4)
Copy image center position adjustment
(5) Focus adjustment (Resolution
adjustment)
(6) Copy magnification ratio adjustment
(7) Uniformity adjustment
(8)
Image loss, void area adjustment
* For details, refer to the Ref. page.
B. Notes
When performing the adjustment, observe the following notes:
1) Observe the sequence of procedures shown in the flowchart
below.
2) Adjustment can be started midway in the flowchart only if all the
previous items have been properly adjusted.
3) If the content of an adjustment item in the flowchart is changed,
all the following items must be adjusted accordingly.
Any adjustment item is based on the previous adjustment items
and relates to the following adjustment items.
4) "Sim" in the flowchart stands for "Simulation."
Standard setting value in the sim48-1 and 26-8 (Reference)
Lens No. –1 0
sim48 77 75
sim26-8 0 1
Lens No. 13 14
sim48 53 51
sim26-8 14 15
Adjustment content
a
a
b
a
b
a
b
c
a
b
1 2 3 4
73 72 70 68
2 3 4 5
15 16 17 18
49 48 46 44
16 17 18 19
Lens unit right angle adjustment
No.4/5 mirror unit right angle
adjustment
No. 4/5 mirror unit drive cam position
adjustment
Horizontal image distortion adjustment
Vertical image distortion adjustment
Vertical copy magnification ratio
adjustment (normal copy)
Vertical copy magnification ratio
adjustment (zoom copy)
Horizontal copy magnification ratio
adjustment (zoom copy)
Copy image position adjustment
Void area adjustment
Lead edge
Lead edge void area adjustment (SPF
mode)
End edge void area adjustment
START
(1)-a
Adjust the lens unit inclination
to zero.
(2)-a
Adjust No.4/5 mirror unit inclination
to zero.
Check the lens No. (OL No.)
Obtain the lens reference position set
value from the lens No. table.
Execute Sim48-1 to set the lens
reference position set value.
Obtain the lens reference position set
value in the zoom copy mode from the
lens No. table.
(SF-2414/2514 only)
5 6 7
67 65 63
6 7 8
7 – 3
Adjustment
Necessary
value/Standard
special tool
value
— —
— —
— —
— —
— —
0 ±1.5 mm
—
* —
100 ±0.8%
—
100 ±0.9%
—
100 ±0.8%
—
— —
* —
*
—
Execute Sim26-08 to set the lens
reference position set value in the
zoom copy mode.
(SF-2414/2514 only)
Set to the normal copy state in the
(2)-b
normal copy mode and set the lens
unit to the normal position. Then fix the
No.4/5 mirror drive cam position to the
specified position.
Fix the blank lamp to the center.
(4)
Fix the lens center position adjustment
rail at the center temporarily.
(5)
Fix No.4/5 mirror position to the
center.
1
8 9 10 11
61 60 58 56
9 10 11 12
Ref.
page
7-6
7-7
7-8
7-8
7-11
7-12
7-14
7-15
7-16
7-16
7-18
7-19
7-23
12
55
13