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Item No.
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.
Display
Calculation(R)
Calculation(G)
Calculation(B)
Threshold(R)
Threshold(G)
Threshold(B)
Threshold
(Abnormal)
Mode
Execute
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.(1 st sheet: Approx. 60 mm black band, 2nd sheet:
Blank or approx. 60 mm gray band)
7. If vertical black lines appear on the blank (or gray band) page and vertical white lines appear
on 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.
Service Manual
Description
Abnormal pixel count result for color R
Abnormal pixel count result for color G
Abnormal pixel count result for color B
Abnormal pixel detection threshold value for color R
Abnormal pixel detection threshold value for color G
Abnormal pixel detection threshold value for color B
Abnormal pixel threshold value setting
Switching between white line correction mode ON/OFF
Holding of white reference data
1-3-58
Description
2NP
Y116141-8
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