Ricoh A250 Service Manual page 490

BIT SWITCHES
Scanner Switch 03
No FUNCTION
0 Binary picture processing:
to Threshold for Photo and
7 Text/Photo mode - Normal
setting (center position)
Scanner Switch 04 - Not used (do not change the settings)
Scanner Switch 05 - Not used (do not change the settings)
Scanner Switch 06
No FUNCTION
0
MTF filter level (Text mode)
to
The value can be between 0(Off) and F. For a weaker threshold, input a lower
3 value.
Default setting: 7
This setting is independent from the threshold specified by copier SP mode 4-916.
4 MTF filter level (Text/Photo mode)
to The value can be between 0(Off) and F. For a weaker threshold, input a lower
7 value.
Default setting: 7
This setting is independent from the threshold specified by copier SP mode 4-916.
Scanner Switch 07
No FUNCTION
0 Smoothing filter level (Photo
to mode)
2
3-7 Not used
Scanner Switch 08 - Not used (do not change the settings)
Scanner Switch 09 - Not used (do not change the settings)
Scanner Switch 0A
No FUNCTION
0 Isolated dot elimination level
to (Text modes)
2
3-7 Not used
A250
COMMENTS
This setting determines the threshold value for
binary picture processing in Text/Photo 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: 23(H) = 35(D)
COMMENTS
COMMENTS
The value can be between 0(Off) and 7. For a
weaker threshold, input a lower value.
Default setting: 2
This setting is independent from the threshold
setting specified by the copier's SP mode 4-927.
Do not change the settings.
COMMENTS
The value can be between 0(Off) and 4.
For a higher threshold, input a higher value.
Default setting: 2
This setting is independent from the threshold
setting specified by the copier's SP mode 4-917.
Do not change the settings.
4-28 SM