My copies are coming out with streaks and smears on them. The glass top is clean. How do I check and clean the inside?

Open the feeder from the top of the machine...you will see a thin strip of glass maybe 1/2" wide running from the rear of the machine to the front..odds are there is glue/dirt/corrector fluid or some other dirt on the glass. Clean this off.

The line is probably not from the ink cartridges or nozzles (assuming regular printing doesn't streak). Streaks on copies and transmitted faxes are usually due to dirt or problems on the scanner unit. First clean the flat bed of the scanne. If you have an automatic document feeder, clean that.

Clean with a lint free cloth moistened with a little water or glass cleaner. Make sure no foreign objects are in the ADF path or on the glass. For pictures see the Lexmark support site: http://support.lexmark.com/index?page=product&linkSelected=node0&locale=EN&userlocale=EN_US#1. Then enter "streak on copy" - the solution comes up in a pop up.

If the streak is shrinking, then copy a blank white piece of paper to identify where to clean further. Try scanning another page with a small mark on it. (These are particularly helpful for cleaning the ADF.)

If the mark occurs when you print, then check if you have a damaged cartridge or other ink that has spilled inside the printer.

I hope this helps.

Cindy Wells

Clean the scanner strip glass. This is the small strip of glass that is just to the left of the large main glass. This is the only cause for black line (s) when copying using the ADF(top feed). If prints or copies fine from the glass then it is this strip glass needing to be cleaned.

If it is just when you copy and not when you print then it is a cleaning issue. Toner cartridge would cause the line to appear on copies, printouts and faxes. There is a piece of glass inside the auto document feeder that is probably dirty. Open up the document feeder as if you were clearing an original document jam. Look for a piece of glass inside the ADF, it will run the length of the document feeder. There is probably some dirt or another popular problem is white out. Clean off the glass with glass cleaner or alcohol and it should fix the problem.

Hello sir; Let's try two things , 1st, make a copy go through by ADF. 2nd, make another copy direct from the glass. if 1st one coming out with streak line that's mean on the left hand side of the plateform have a piece long strip glass need to clean.
if streak line coming out from 2nd copy that's mean you need to replace drum cleaning blade.

Dear sir; Streak line, I have two things come out from my mind I need to clear; no. 1 do you make copy through ADF and got streaking line? if your answer is "yes" would you to make another copy direct from glass plateform, if copy coming out same problem that's means you need to replace drum cleaning blade, if copy coming out perfect then you need to clean the glass especial the narrow piece if they have, try it out and let me know, good luck!
HAVE A HAPPY HOLIDAY!!!

Hi,

Over time the automatic document feeder (ADF) will get dirty, occasionally causing vertical black streaks or lines in scans and copies .

Manual cleaning of the ADF might be necessary. Follow the procedure below to manually clean the ADF .

You will need the following materials:

• Soft lint-free cloths
• Glass cleaner

if you look carefully on the left side of ADF ( top feeder ) there is an assembly which u can lift , there wud be a set of rollers if u lift that part there would be a glass strip . u are suppose to clean that strip .
While holding up the inside of the ADF, clean the glass in the location of the vertical streak with one of the cotton swabs. Try cleaning the glass first with a dry cotton swab. If that does not correct the problem, then moisten the swab with glass cleaner .
If the vertical lines or streaks still appear, go through the above cleaning process again, this time cleaning the entire surface of the ADF scanner glass.
and after this try the following steps as well .
CAUTION: Use only glass cleaner. Avoid abrasives, acetone, benzene, and carbon tetrachloride, all of which can damage the scanner glass.

try making a copy on the glass, does it come out with the streaks or clean?
If clean then look at the strip glass on the copier there is a pen dot or white out that 's giving you the streak. clean.

The service manual is avalable free through Emule:

ed2k://|file|Canon%20PIXMA%20MP750%20MP780%20service%20manual.pdf|1416152|F054D74C11BE5EEAF2F6D203362303DE|/

First you need to determine if it's doing from both the  top and the glass.

1-assuming you are using the feeder to fax,copy or scan (the part that automatically picks up the paper) it comes out with a streak. Make a copy putting the paper on the glass and look at the copy. Does it have the streak?

2-lift the top and look to the left there should be a small 1inch glass, this is where it makes the copies from the feeder, is there a dot or white out or is the glass dirty? that's your streak, the paper is moving to make the copy,so the dot now looks like a line as opposed to making a copy on the glass it just sits there so a dot will stay a dot.

2- Clean with water or alcohol.