Canon iPF780 User Manual page 11

Troubleshooting
Frequently Asked Questions
Frequently Asked Questions ................................................................................................................................................ 576
Problems Regarding Paper
Clearing Jammed Roll Paper ................................................................................................................................................ 577
Clearing a Jammed Sheet ..................................................................................................................................................... 580
Clearing Jammed Paper (Paper Feed Slot) ................................................................................................................... 583
Roll paper cannot be inserted into the Paper Feed Slot ......................................................................................... 585
Cannot load sheets .................................................................................................................................................................. 585
Paper is not cut neatly ........................................................................................................................................................... 585
Paper is not cut ......................................................................................................................................................................... 585
Depression on the leading edge is left ........................................................................................................................... 586
The size of clear film cannot be detected ..................................................................................................................... 586
Roll Paper is Continuously Ejected ................................................................................................................................... 586
Printing does not start
The Data lamp on the Control Panel does not light up ........................................................................................... 587
The printer does not respond even if print jobs are sent ...................................................................................... 587
Ink Filling.. is displayed ........................................................................................................................................................... 587
The display screen indicates Agitating... ........................................................................................................................ 587
The printer stops during a print job
An error message is shown on the Display Screen ................................................................................................... 588
The printer ejects blank, unprinted paper ..................................................................................................................... 588
Problems with the printing quality
Printing is faint .......................................................................................................................................................................... 589
Paper rubs against the Printhead ..................................................................................................................................... 589
The edges of the paper are dirty ...................................................................................................................................... 590
The surface of the paper is dirty ...................................................................................................................................... 591
The back side of the paper is dirty .................................................................................................................................. 591
Printed colors are inaccurate .............................................................................................................................................. 591
Banding in different colors occurs ................................................................................................................................... 592
Colors in printed images are uneven ............................................................................................................................... 592
Image edges are blurred or white banding occurs .................................................................................................... 593
The contrast becomes uneven during printing ........................................................................................................... 593
The length of printed images is inaccurate in the feeding direction ................................................................. 594
Images are printed crooked ................................................................................................................................................. 594
Documents are printed in monochrome ........................................................................................................................ 594
Line thickness is not uniform .............................................................................................................................................. 594
Lines are misaligned ................................................................................................................................................................ 595
Cannot print over a network
Cannot connect the printer to the network .................................................................................................................. 596
Cannot print over a TCP/IP network ................................................................................................................................ 596
Cannot print over a Bonjour network .............................................................................................................................. 596
Installation problems
The computer does not recognize the printer ............................................................................................................ 597
Removing Installed Printer Drivers .................................................................................................................................... 597
HP-GL/2 problems
With HP-GL/2, printing is misaligned ............................................................................................................................... 599
Lines or images are missing in printed HP-GL/2 jobs. ............................................................................................. 599
Lines are printed too thick or thin in HP-GL/2 print jobs ....................................................................................... 599
HP-GL/2 jobs are printed in monochrome (or color) ............................................................................................... 599
Printed colors of lines are inaccurate during HP-GL/2 printing .......................................................................... 599
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