2DF
1-4-19
Maintenance
Description
item No.
U087
Turning the DF scanning position adjust mode on/off
Description
Turns on or off the DF scanning position adjust mode, in which the DF original scanning position is adjusted
automatically by determining the presence or absence of dust on the slit glass. Also changes the reference
data for identifying dust.
Reference
In the DF original scanning position adjust mode, the presence or absence of dust is determined by comparing
the scan data of the original trailing edge and that taken after the original is conveyed past the DF original
scanning position. If dust is identified, the DF original scanning position is adjusted for the following originals.
Purpose
Used to prevent appearance of black lines due to dust adhering in the original scanning position on the slit
glass when the DF is used.
Method
1. Press the start key. The screen for selecting an item is displayed.
2. Select the item to be set and press the start key.
Display
Description
ON/OFF
Setting the mode on/off
DATA
Setting the reference data for identifying dust
Setting the mode on/off
1. Select ON or OFF. The selected item is displayed in reverse.
Display
Description
ON DF
scanning position adjust mode on
OFF DF
scanning position adjust mode off
Initial setting: ON
2. Press the start key. The setting is set. The screen for selecting an item is displayed.
Setting the reference data for identifying dust
Available only when the mode is turned on.
1.Change the setting using the cursor up/down keys.
Description
Setting range
Initial setting
Minimum density to be regarded as dust
10 to 95
35
Example
The figure indicates the density in 256 levels of gray (0: white, 255: black). When the setting is 35, data of
the level of 35 or higher is regarded as dust and data of lower level is regarded as the background (scan
data taken when there is no original).
2. Press the start key. The value is set.
3. To return to the screen for selecting an item, press the stop/clear key.
Completion
Press the stop/clear key at the screen for selecting an item. The screen for selecting a maintenance item No. is
displayed.
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