Sharp MX-2314N Service Manual page 126

2) Make a duplex copy at the normal ratio on A4 paper.
3) Measure the images on the copy paper and the original
images.
copy
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.
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 with the scroll key.
SPF (SUB) Sub scanning direction image magnification ratio
(Front surface)
SPFB (SUB) Sub scanning direction image magnification ratio
(Back surface)
original
Setting Default
Content
range value
1 - 99 50
1 - 99 50
1 - 99 50
1 - 99 50
1 - 99 50
1 - 99 50
MX-3114N ADJUSTMENTS AND SETTINGS 5 – 77
7) Enter an image magnification ratio 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 magni-
fication ratio is changed by 0.1%.
8) Make a normal copy and obtain the copy magnification ratio.
Repeat the procedures of 1) - 8) until a satisfactory result is
obtained.
ADJ 17
Scan image off-center
adjustment
(Manual adjustment)
Normally if the adjustment is executed by ADJ 4 (automatic adjust-
ment), there is no need to execute this adjustment.
Only when the manual adjustment is required, execute this adjust-
ment.
In other words, this manual adjustment is executed when a satis-
factory result is not obtained from the automatic adjustment (ADJ
4).
17-A Scan image off-center adjustment (Manual
adjustment) (Document table mode)
This adjustment must be performed in the following cases:
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* When a U2 trouble occurs.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
1) Make a copy of the adjustment chart (made by yourself) in the
adjustment mode (document table).
2) Check the copy image center position.
If A - B =  1.0mm, the adjustment is not required.
If the above condition is not satisfied, perform the following
procedures.
A
A = B
B
A'
A' - B' = 1.0mm
(100%)
B'