After replacing the back CIS on its own, and not the complete DADF/scanner assembly, adjust the difference in the color balance between front and back as follows.
If you replaced the DADF/scanner assembly, go into the Maintenance Mode Menu, and enter the values on the barcode on the unit in accordance with “Adjustment after replacing the DADF/Scanner Assembly”.
- You cannot change the color balance on the front. Adjust the color balance on the back compared with that on the front depending on whether the front is gray, reddish, greenish, or bluish.
After changing the back CIS, enter the Maintenance Mode Menu.
- Press [Scanner Service Setting].
Press [Image Adjust].
Check that the following settings are set to the initial value of "0".
If not, change the values to “0”.Setting
Initial value
Range (steps)
Description Backside CIS-Red-White
0
-15 to 15 (1)
Adjusts the difference in color balance between the front and back for red.
Backside CIS-Green-White
0
-15 to 15 (1)
Adjusts the difference in color balance between the front and back for green.
Backside CIS-Blue-White
0
-15 to 15 (1)
Adjusts the difference in color balance between the front and back for blue.
Backside CIS-Gray-White
0
-15 to 15 (1)
Adjusts the difference in color balance between the front and back for gray.
Place an original that has gray parts on both sides on the DADF, and then make a duplex color copy.
Check that the gray parts on the copy appear the same on both sides.
- If they are the same (targeted gray), there is no need for adjustment.
If adjustment is necessary, check which color in the following list looks the most similar to the results.
Targeted gray (normal color)
Reddish
Greenish
Bluish
Check which is the applicable case from cases 1 to 4 below, and then enter the adjustment values accordingly.
Examples:
a) The image on the front is 'targeted gray', and the image on the back is 'greenish'
Applicable to case 1. The adjustment values are (4, -4, 4, -4).
b) The image on the front is 'reddish' and the image on the back is 'bluish'
Applicable to case 2. The adjustment values are (8, 0, -8, 0).
Case 1: Adjustment values when the image on the front is "targeted gray"
Image on the front
Image on the back
Targeted gray
Reddish
Greenish
(Adjustment example a)
Bluish
Red
0
-4
4
4
Green
0
4
-4
4
Blue
0
4
4
-4
Gray
0
4
-4
4
Case 2: Adjustment values when the image on the front is "reddish"
Image on the back Image on the front
Image on the back
Targeted gray
Reddish
Greenish
Bluish
(Adjustment example b)
Red
4
0
8
8
Green
-4
0
-8
0
Blue
-4
0
0
-8
Gray
-4
0
-8
0
Case 3: Adjustment values when the image on the front is "greenish"
Image on the back Image on the front Image on the back
Targeted gray
Reddish
Greenish
Bluish
Red
-4
-8
0
0
Green
4
8
0
8
Blue
-4
0
0
-8
Gray
4
8
0
8
Case 4: Adjustment values when the image on the front is "bluish"
Image on the back
Image on the front
Targeted gray
Reddish
Greenish
Bluish
Red
-4
-8
0
0
Green
-4
0
-8
0
Blue
4
8
8
0
Gray
-4
0
-8
0
After the adjustment, make a duplex color copy and then check that the colors are the same on both sides.