Canon imagePROGRAF GP-4000 - Manual (Page 764)

Check 3 Is the Print head position adjusted correctly?
Adjust the Print head position.
Automatic Adjustment to Straighten Lines and Colors
Check 4 Is the feed amount adjusted correctly?
Adjust feed amount.
Adjusting Feed Amount
Check 5 Colors in printed images may be uneven if the Print Quality setting is too low
If using Windows, select Advanced Settings from the Main tab of the printer driver, and then select a higher
Print Quality setting.
If using macOS, select Quality & Media in the printer driver, and then select a higher Print Quality setting.
Changing the Print Quality and Correcting Image Data (Windows)
Changing the Print Quality and Correcting Image Data (macOS)
Check 6 Colors in printed images may be uneven on the boundary between shades if
there are dark and light areas in an image
Prints on the same page while switching between Bidirectional printing and Unidirectional printing. Therefore,
color unevenness may occur when switching. Using the unidirectional printing function may reduce color
unevenness in this situation.
Follow the steps below for unidirectional printing.
• Windows •
Open Paper Detailed Settings from the Main tab of the printer driver, and then select Unidirectional
Printing .
• macOS •
Open Advanced Paper Settings in the printer driver, and then select Unidirectional Printing .
Check 7 If printing borderless, colors in printed images may be a little uneven at the
leading edge of the paper because printing is interrupted to cut the paper
Set the printer driver Automatic Cutting settings to No , and then print. Doing this prints only the left and right
sides borderless. Cut the top and bottom borders with a cutting implement such as scissors after the printed
materials are output and cut.
Note
• Selecting a higher Print Quality in the printer driver Advanced Settings may resolve the problem. •
Changing the Print Quality and Correcting Image Data (Windows)
Changing the Print Quality and Correcting Image Data (macOS)
Check 8 Does this paper curl easily?
Colors in printed images may be uneven at the leading edge of paper that curls easily. Change the Transport
unit vacuum strength in the touch screen to increase the grip on the paper, or set a margin of at least 0.8
inches (20 mm) at the front edge of the paper.
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