3-20 Service Manual
7526
Top Margin (duplex)
This setting controls the offset between the first scan line on the front of the duplex page and the first scan line
on the back of the page. Therefore, be sure to set the top margin in REGISTRATION before setting the duplex
top margin. See “Registration” on page 3-6.
To set the Top Margin (duplex):
1. Touch DUPLEX TESTS in the Diag Menu.
2. Touch Quick Test.
3. Touch Single.
The test page prints.
4. Hold the page to the light to see whether the top margin of the back aligns with the top margin of the front.
5. If they do not match, select Top Margin.
6. Use or to select the margin setting you need to change.
• Each increment shifts the duplex top margin by 1/100 of an inch.
• The Top Margin (duplex) range is -25 to +25, and the default value is 0.
• An increase moves the top margin down and widens the top margin. A decrease moves the top
margin upward and narrows the top margin.
7. Touch Submit.
8. Print the Quick Test again to verify the adjustment. Repeat until the front and back top scan lines match.
Left Margin (duplex)
By modifying this setting you can shift the image on the back side of a duplex page to the right or to the left.
To set the Left Margin (duplex):
1. Select DUPLEX TESTS in the Diagnostics Menu, and then press Select ().
2. Select Quick Test, and then press Select ().
3. Select Single, and then press Select ().
The test page prints.
4. Hold the page to the light to see whether the left margin of the back aligns with the left margin of the front.
5. If they do not match, Touch Left Margin.
6. Use or to select the margin setting you need to change.
• Each increment shifts the duplex left margin by 4 pixels at 600 dpi (0.00666 inches or 0.1693 mm).
• The Left Margin range is -50 to +50, and the default value is 0.
• An increase moves the margin to the right, and a decrease moves the margin to the left.
Skew (duplex)
This setting adjusts the duplex motor speed when it feeds through the aligning roll. It controls the skew between
the first scan line and the top of the page. Adjustments are made to the image that is face down in the output
tray.
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