Sharp MX-C250 Service Manual page 55

Sim48-01 MAGNIFICATION ADJ
1 CCD (MAIN)
2 CCD (SUB)
3 SPF (MAIN)
1 / 3 [ 1/ 99]
RSPF
Item Display Content
1 CIS(MAIN) SCAN main scanning mag-
nification ratio adjustment
(CIS)
2 CIS(SUB) SCAN sub scanning mag-
nification ratio adjustment
(CIS)
3 SPF(MAIN) RSPF document front sur-
face magnification ratio
adjustment (Main scan)
4 SPF(SUB) RSPF document front sur-
face magnification ratio
adjustment (Sub scan)
5 SPFB(MAIN) RSPF document back sur-
face magnification ratio
adjustment (Main scan)
6 SPFB(SUB) RSPF document back sur-
face magnification ratio
adjustment (Sub scan)
SPF
Item Display Content
1 CIS(MAIN) SCAN main scanning mag-
nification ratio adjustment
(CIS)
2 CIS(SUB) SCAN sub scanning mag-
nification ratio adjustment
(CIS)
3 SPF(MAIN) RSPF document front sur-
face magnification ratio
adjustment (Main scan)
4 SPF(SUB) RSPF document front sur-
face magnification ratio
adjustment (Sub scan)
6) Select an adjustment item of SPF (MAIN)/SPFB (MAIN) with
[UP] or [DOWN] keys.
SPF (MAIN) Main scanning direction image magnification ratio
(Front surface)
SPFB (MAIN) Main scanning direction image magnification ratio
(Back surface)
7) Enter an adjustment value with 10-key, and press [OK] key.
When the adjustment value is increased, the image magnifica-
tion ratio is increased. When the adjustment value is changed
by 1, the image magnification ratio is changed by 0.02%.
8) Make a normal copy and obtain the copy magnification ratio.
Repeat the procedures of 1) - 8) until a satisfactory result is
obtained.
6-D Scan image magnification ratio adjustment
(sub scanning direction) (Manual
adjustment) (RSPF mode)
This adjustment must be performed in the following cases:
* When the SCAN CONTROL PWB is replaced.
* When U2 trouble occurs.
* When the copy magnification ratio of the RSPF mode copy
image in the sub scanning direction is not proper.
* When the RSPF is disassembled.
1)
50
30
20
50
Setting Default
range value
1 - 99 50
1 - 99 50
2)
3)
1 - 99 50
1 - 99 50
1 - 99 50
1 - 99 50
Setting Default
range value
1 - 99 50
4)
1 - 99 50
1 - 99 50
1 - 99 50
5)
Item
1
2
MX-C250 ADJUSTMENTS 5 – 21
Place the duplex adjustment chart shown below on the docu-
ment tray of the RSPF.
The adjustment chart is prepared by the following procedures.
Use A4 (11" x 8.5") paper, and put marks on both sides and
both surfaces of the paper at 10mm from each edge.
10mm
Paper pass direction
10mm
Make a duplex copy at the normal ratio on A4 paper.
Measure the images on the copy paper and the original
images.
copy
Obtain the image magnification ratio according to the following
formula:
Image magnification ratio = Original size / Original size x 100
(%)
Image magnification ratio = 99 / 100 x 100 = 99 (%)
If the image magnification ratio is within the specified range
(100 0.8%), there is no need to perform the adjustment.
If it is not within the specified range, perform the following pro-
cedures.
Enter the SIM 48-1 mode.
Sim48-01 MAGNIFICATION ADJ
1 CCD (MAIN)
2 CCD (SUB)
3 SPF (MAIN)
1 / 3 [ 1/ 99]
Display Content
SCAN main scanning mag-
CIS(MAIN) nification ratio adjustment
(CIS)
SCAN sub scanning mag-
CIS(SUB) nification ratio adjustment
(CIS)
A4 size
original
50
30
20
50
Setting Default
range value
1 - 99 50
1 - 99 50