I have a X7170 it has recently began printing with vertical blank areas on the printed copy. In other words up and down on the page there missing copy. I have changed ink cartridges and this does not help. It has been occuring off and on, now it does not print anything with out the verticle lines with out type in it.

Try replacing color toner of the same color that are the lines.If the void was in the same place all of the time then I would say use a Q tip dipped in 90 proof alcohol and clean laser.

i have cannon 3530 xerox machine ... it shows error code 350 ?? any solution ??

Happened with me too. Turned out to be a small sticky smudge on the ADF glass. That is the smaller glass scan area to the left of the large glass scanning area.
When using the ADF to scan or copy, make sure the smaller glass area is clean along with the rollers.

Does this happen when you print, or only when you copy? If you print out a configuration or user settings page, or print a page from the computer, is it also missing two vertical lines of print or is it only when you are copying?

If it happens when you print, you may need a cleaning, or you may need to replace the toner or drum cartridge. If it's an inkjet machine, there's a possibility there is some ink or grease on the encoder strip (a small belt-like plastic strip that goes through the print-head carriage).

If it only happens when you copy, test both the flatbed and the document feeder. If it happens on both then you may have a bad scanner. If it only happens when using the document feeder, you likely have some whiteout (or something) on the glass. When you make a copy in the flatbed, the scanner moves across your document. When you make a copy using the document feeder, the document moves across the scanner. In this case, if there is anything on the scanner glass (like whiteout) your copies will be missing a vertical line of print data (it could be white if there is whiteout on the glass, or it could be dark if something dark is on the scanner glass).

Usually you can lift the flatbed cover and look at the glass to see if anything is on it (usually at the left side of the scanner). Clean the glass, first with alcohol to remove the obstruction, and then with a little windex to remove anything the alcohol may have left behind.

Try to print some more pages. The ink will take time to go down as it is not free flowing. This is due to the air beetween the new ink and the old ink, after some printing the air is push out and then you can have a clear print.

Hi. Lexmark has a patch for
resolving problem like printing a
multipage document. Here's the
link to the patch.
http://bit.ly/aMwdWR . Click on
patchformultipageUACissue2.0.exe .
Run the software in your computer.
Try printing a multipage document
again. Hope this resolves your
problem. Good luck!

There is a service update from Canon, where a part needs to be change in the laser area. You can try to slam the toner door shut to see if it changes it temporarily, but a laser shutter arm needs to be changed.

Check the front paper exit rollers for fit and alignment also the paper deck guides close to the planten area, if the printer is dropping print vertically down one side of the page, this can be caused by debris or anything that lifts the caridge assy the slightest bit, also check the print head seating and ribbin cable for proper alignment

1st print a report, can you see the lines? Then either the drum is faulty or the laser scanner is. If the lines are not present when printing a report, make a copy and see then if the lines appear. If so, the scanner is faulty. Try cleaning the glass with glass cleaner. However, blank lines mean that bits are missing from the scanner itself and the scanner will need to be replaced.

is this a laser printer? have you replace the toner cart?