Question about Lexmark C782dn Laser Printer

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C782: vertical lines showing up on printed media. tried replacing itu and fuser, performed maintainence on itu including belt tracking test. also tried vaccuming waste toner receptacle, air dusting the itu wiper, tried just about everything PLEASE HELP

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  • Lexmark Master
  • 990 Answers

Hello sir; I believed the vertical lines coming out from your drum cartridge, replace it !

Posted on Feb 02, 2010

  • dts2000
    dts2000 Mar 07, 2013

    all toner cartridges and ITU and fuser changed with no change

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2 Answers

100.01 Services ITU Error, Lexmark C782


From the Lemark Service manual

A 100.01 ITU error indicates that the printer did not detect the ITU belt home sensor. Before proceeding with this

service check, make sure that the Second Transfer Roll is correctly installed. After you reinstall the Second

Transfer Roll, check to see if a 100.01 ITU error is still displayed. If a 100.01 ITU error is still being displayed,

continue with this check.

The ITU has an optical sensor that watches for a piece of reflective tape on the inside of the image belt. This

tape is read every revolution of the belt. If a signal is not received from the belt sensor within a certain time

period, the printer posts an error due to the loss of signal. There are several causes for the loss of signal. First,

the belt has tracked too far to the front or rear of the printer. In this case, the belt is still turning, but the reflective

tape is no longer passing within view of the belt sensor. This is considered a belt tracking error and is initially

posted as a 100.02 ITU Error. The other causes of a signal loss could be a belt stall, meaning the belt is not

turning, or a true signal loss, which would be due to a bad sensor, broken cable, loose connection, or bad

system board. These other causes post as a 100.01 ITU Error.

To assist the printer in determining the cause of a signal loss, there is a buffer that records the belt position for

the last 50 revolutions. If the printer loses the belt signal, it refers to the buffer. If the buffer shows significant

mistracking before signal loss, it will post a 100.02 ITU Error. If the buffer shows that the belt has been tracking

in the center before signal loss, it posts a 100.01 ITU Error. Due to memory restrictions, the buffer is not saved

during POR. This means if a printer posts a 100.02 ITU Error, so the belt is tracked off, and the customer or

servicer turns off the printer to clear the error, when the printer starts up, it will still not see the belt signal and will

now post a 100.01 ITU Error because the buffer is empty. When servicing a printer for a 100.01 ITU Error, it is

important to view the error log. See "Display Log" on page 3-29. The error log can only be displayed at this
point. Do not try to print the log. Look for past occurrences of 100.01 ITU Errors preceded by a 100.02 ITU Error.

Apr 13, 2011 | Lexmark C772dn Laser Printer

8 Answers

Color Print Quality


In my experience, the fuser has always been the cause of the lines.

Jul 09, 2008 | Ricoh CL3000E Laser Printer

1 Answer

I have a Toshiba DP120F fax machine and I'm getting a black line down the lenght of my faxes on the left margin. How do I make it go away?


Problem :
Vertical black lines

Cause: Contaminated fuser entrance guide Solution: Clean the guide

Cause: Defective toner cartridge. Solution: Replace the toner cartridge. ( By far the most common cause)

Cause: A "video line" generated by a defective formatter.
Solution: Replace formatter

Cause: Worn fuser film. Solution: Set the fuser to a lower temperature mode. Replace the fuser. Note To prevent the print-quality problem, reduce printing on large volumes of narrow media, such as envelopes. Instead, alternate smaller volumes of narrow media with full-page printing jobs.

Hope this helps.
Good Luck

Oct 18, 2010 | Toshiba DP120F All-In-One Laser Printer

1 Answer

STREAK ON ITU OF LEXMARK C782


The only thing that helps is replacing the ITU.

Jul 09, 2010 | Lexmark C782dn Laser Printer

1 Answer

MFC-9440 CN Laser Printer is producing vertical color line streak


Colored vertical streaks - looks like a transfer belt problem, and it's not user fixable. You may need a new belt unit - you can find it for around US$ 80-120, but you may want to have a technician inspect the unit first, since it could arguably be the drum instead, and you don't want to fork around US$ 100 and replace the wrong part.
You can try showing a printer sample at a print shop; by looking at the streaks it is possible to diagnose drum, fuser or belt problems.
Here you find a much more detailed page, for another printer model, but the issues are mainly the same for most color printers:
http://www.laserquipt.com/support/idx/26/452/article/Toner-Smearing-Issues.html

Mar 25, 2010 | Brother MFC-9440CN Laser Printer

1 Answer

Vertical lines of missing print


I'd certainly be swapping the fuser first although I know how expensive they can be and what a pain they can be to get at. You've tried everything else I would start with and as the text is smudging I'd certainly be testing the fuser next. Scott.

Dec 12, 2009 | Konica Minolta magicolor 2500 Printer

1 Answer

HP Laserjet IIIP starting printing thin vertical black line


Was this happening before you swapped toner?
Is there toner streaks on the drum? Yes? Defective.
What if you stop the printer (open cover) as it passes through the fuser to determine if image is from drum or fuser?
But really....isn't it time to move on anyway???

Mar 20, 2009 | HP LaserJet IIIp Printer

1 Answer

Hp 2420 vrtical line in page


Hello,

This issue can be due to fuser. I am sure you have changed the toner cartridge.
To confirm its a fuser issue, please perform the following:
1. Try printing a configuration page from tray 1, pull the top cover, as soon as the media is 60-70% inside the printer.
This would stop the paper before reaching the fusing assy.
2. Remove the paper and check if the line exist.
If exists, fuser is not faulty.
If it does not, then transfer roller, laser/scanner assy is faulty

- If fuser is faulty, perform the cleaning page as following
1. go to configure device > print quality > create/process cleaning page
perform cleaning page 5-6 times, however, if the line is due to fuser, then fuser needs to be changed.

Let me know the next update.

- Nikhil

Nov 21, 2008 | HP LaserJet 2420 Printer

2 Answers

Hp laserjet 2840 all in one gives FUSER ERROR


For any fuser error, the first thing that should be done is replacing the fuser. If the error still shows up after wards, it could be the LVPS (Low voltage power supply) or a board.

May 26, 2008 | HP LaserJet 2840 All-In-One Printer

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