2LK/2LN/2LM/2LC-2
1-3-67
U091 Setting the white line correction
Description
Sets the error detection threshold value for white line correction and displays the count result of
abnormal pixels.
Purpose
To perform when replacing the CIS, DP main PWB or CIS roller.
Method
1. Press the start key.
2. Select the item.
Method: white line correction
1. Press [Execute].
2. Press the start key. Holding of white reference data is started.
3. The count result of abnormal pixels is displayed.
4. Press the system menu key.
5. Place a gray original on the DP with the gray side down. Load paper in the cassette.
The paper should be the same size as the original.
6. Press the start key.
Two test pattern sheets will be printed. (1st sheet: Approx. 60 mm gray band, 2nd sheet:
Approx. 60 mm black band)
7. If no vertical lines appear on either sheet, the setting has been completed normally.
If vertical black lines appear on the gray band and vertical white lines appear in the black
band in the same position, clean the CIS roller and the CIS glass and then repeat white line
correction.
If vertical black lines or vertical white lines appear on both sheets, white line correction has
been completed normally. However, the cause of the vertical lines lies in the engine, and thus
the engine must be checked.
8. Press the system menu key.
Mode is set to 1.
Item No. Description
Display Description
Calculation(R) Abnormal pixel count result for color R
Calculation(G) Abnormal pixel count result for color G
Calculation(B) Abnormal pixel count result for color B
Threshold(R) Displaying of abnormal pixel detection threshold value for color R
Threshold(G) Displaying of abnormal pixel detection threshold value for color G
Threshold(B) Displaying of abnormal pixel detection threshold value for color B
Threshold
(Abnormal)
Abnormal pixel threshold value setting
Mode Switching between white line correction mode ON/OFF
Execute Holding of white reference data
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