20 June 2005
SERVICE PROGRAM MODE TABLES
5-21
Service
Tables
APS Sensor Output Display 0: Original size detection at power on disabled.
1
: Original size detection at power on enabled
4307*
Determines whether or not the original size is detected while the exposure lamp
lights during initialization.
4428
Scanner Adjustment DFU
44281
Flag Display
44282
Start
44283
Flag Reset
4901
*
SBU Setting
DFU
4995
Scanner Evaluation Mode DFU
Scanner: Text: Print
4550*
These SP codes set the MTF (Modular Transfer Function
*
1
) for text printed after
scanning.
Note
:
•
As a general rule, adjust the level (coefficient) before adjusting the strength.
•
Raising the brightness or contrast level may increase the occurrence of moiré
4550 1 MTF Filter Level: Main Scan
4550 2 MTF Filter Level: Sub Scan
Set the MTF coefficient for main/sub scan
directions.
[0~15/
8
/1]
0: Weakest
Å
8: Default
Æ
15: Strongest
4550 3 MTF Filter Strength: Main Scan
4550 4 MTF Filter Strength: Sub Scan
Set the MTF strength for main/sub scan
directions.
[0~7/
4
/1]
0: Weakest
Å
4: Default
Æ
7: Strongest
4550 5 Smoothing Filter
Selects the level of smoothing for originals that
contain dithered images.
[0~7/
0
/1]
0: Default (Off)
Æ
7: Strongest
4550 6 Brightness (Not Used)
Sets the overall brightness of the image.
[1~255/
128
/1]
1: Weakest
Å
128: Default
Æ
255: Strongest
4550 7 Contrast (Not Used)
Sets the overall contrast of the image.
[1~255/
128
/1]
1: Weakest
Å
128: Default
Æ
255: Strongest
4550 8 Isolated Dot Removal
Sets the level of independent dot erasure to
improve the appearance of background.
[0~7/
0
/1]
0: Default (Off)
Æ
7: Strongest
*1
When the CCD converts the original image to electrical signals, the contrast is reduced due to
the influence that adjacent white and black pixels have on one another as a result of lens
properties. Typically, you will see very narrow width and spacing between black and white areas.
MTF corrects this problem and emphasizes image detail.
