Sharp MX-M264U Service Manual page 66

3) Make a normal copy and obtain the copy magnification ratio.
Go to the copy mode, and make a copy.
(Original dimension - Copy dimension)
Copy magnifi-
cation ratio
Original dimension
(Example 1)
Copy A
10
(Shorter than
the original)
Scale
10
(Original)
(Example 2)
Copy B
10
(Longer than
the original)
4) Check that the copy magnification ratio is within the specified
range (100  1.0%).
If the copy magnification ratio is within the specified range (100
 1.0%), the adjustment is completed. If the copy magnification
ratio is not within the specified range, perform the following
procedure.
5) Change the CCD (SUB) adjustment value of Simulation 48-1.
When the adjustment value is increased, the copy magnifica-
tion ratio in the sub scanning direction is increased.
When the adjustment value is changed by 1, the copy magnifi-
cation ratio is changed by about 0.1%.
Repeat the procedures 3) - 5) until the copy magnification ratio is
within the specified range (100  1.0%).
13-C Scan image magnification ratio adjustment
(main scanning direction)
(Manual adjustment) (RSPF mode)
This adjustment must be performed in the following cases:
* When the scan control PWB is replaced.
* When the EEPROM on the scan control PWB is replaced.
* When U2 trouble occurs.
* When the copy magnification ratio of the RSPF mode copy
image in the main scanning direction is not proper.
* When the RSPF is disassembled.
a. Adjustment procedures
1) 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.
Paper pass direction
10mm
100%
20 90 100 110
20 90 100 110
20 90 100 110
A4 size
(Both the front surface
and the back surface)
10mm
MX-M264U ADJUSTMENTS AND SETTINGS 5 – 31
2) Make a duplex copy at the normal ratio on A4 paper.
3) Measure the images on the copy paper and the original
images.
original
10 50 100 150 200
10
4) 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.
5) Enter the SIM 48-1 mode.
RSPF
Item Display
A CCD(MAIN) SCAN main scanning
magnification ratio
adjustment (CCD)
B CCD(SUB) SCAN sub scanning
magnification ratio
adjustment (CCD)
C SPF(MAIN) RSPF document front
surface magnification ratio
adjustment (Main scan)
D SPF(SUB) RSPF document front
surface magnification ratio
adjustment (Sub scan)
E SPFB(MAIN) RSPF document back
surface magnification ratio
adjustment (Main scan)
F SPFB(SUB) RSPF document back
surface magnification ratio
adjustment (Sub scan)
6) Select an adjustment item of SPF (MAIN)/SPFB (MAIN) with
the scroll key.
SPF (MAIN) Main scanning direction image magnification ratio
(Front surface)
SPFB (MAIN) Main scanning direction image magnification ratio
(Back surface)
copy
250
50 100 150 200 250
Setting Default
Content
range value
1 - 99
1 - 99
1 - 99
1 - 99
1 - 99
1 - 99
50
50
50
50
50
50