Ricoh Aficio 270 - Scanner Switches

BIT SWITCHES
SM 4-31 A265/A267
Service
Tables
A895
4.2.2 SCANNER SWITCHES
Scanner Switch 00
No FUNCTION COMMENTS
0
Type of special original mode
0: Monotone background
1: Colored background
This setting determines the scanner parameters
used for special original mode.
0: This setting is for originals with random
background of constant density, such as seen on
banknotes (faxing banknotes is not
recommended!).
1: This setting is for originals with background of
constant density, such as those made on colored
paper.
This switch becomes effective only when system
switch 19 bit 7 is set to 1.
1-3
Not used Do not change the settings.
4
OR processing (Text mode)
0: Disabled
1: Enabled
1: Each pair of scan lines goes through OR
processing before transmission.
5-7
Not used Do not change the settings.
Scanner Switch 01
No FUNCTION COMMENTS
0
to
4
Scan density step value
(Text mode)
When scan density is adjusted manually away
from the Normal setting, the threshold value for
binary picture processing changes for each step
from the value specified by Scanner Switch 02, by
the amount programmed here.
For example, with the default setting (14), the
threshold value changes as follows.
+3 (Darkest) : 77 (= 91 – 14)
+2 : 91 (= 105 – 14)
+1 : 105 (= 119 – 14)
0 (Normal) : 119 (Scanner Switch 02 setting)
-1 : 133 (= 119 + 14)
-2 : 147 (= 133 + 14)
-3 (Lightest) : 161 (= 147 + 14)
The value can be between 00 and 1F(H) [=
31(D)].
For smaller steps, input a lower value.
5-7
Not used Do not change the settings.
Scanner Switch 02
No FUNCTION COMMENTS
0
to
7
Binary picture processing:
Threshold for Text mode -
Normal setting (center
position)
This setting determines the threshold value for
binary picture processing in Text mode (when the
scan density setting is at the center).
The value can be between 01 and FF. For a
darker threshold, input a lower value.
Default setting: 77(H) = 119(D)