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We have a Xerox 8400N that prints light stripes or streaks. I have tried to go through normal cleaning procedures for Random Light Stripes, Smudges or Smears, and Predominate Light Stripes to no avail. I have turned of the unit, and restarted it after 4 hours, printed several test prints, and tried cleaning out the waste tray several times. I am not sure what else to do.
When you go into the eliminate light stripes there is also a mode called Jet Substitution. You can sometimes bypass the bad jets.
If that does not work then the print head will most likely need to be replaced.
You can replace the printer for less than the cost of a print head normally..
remember your ink sticks are crayons. we have removed the print head and using hot air to unclog.remember your ink sticks are crayons. we have removed the print head and using hot air to unclog.
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If you have tried running the "eliminate light stripes" process in the troubleshoot print quality without success, you may want to look at the print quality sheet and do "jet substitution" on the ink nozzle numbers that aren't printing out. That will slightly slow down the printing, but will eliminate white streaks down your prints.
On your panel, scroll to troubleshooting, then to something that states something like adjust image quality or repair image quality. You are looking for a procedure called simply "remove light stripes, and also remove smears and streaks. Run those and they should clean your jets and resolve our problem.
Are you using third party ink? make sure your ink is xerox OEM. This will clogg up the inkjets and ruin the print head for ever, If you have always used the third party ink then you might want to get a new print head. . If you have used xerox ink then It sounds like the magenta reservoir has spilled over the cyan. This is caused by moving the printer and not waiting for the cool down procedure. Also you might want to change the print head wiper. If the print head wiper is over used it won't clean the print head properly and what that causes is for ink to build up and causes smudge. also make sure the drum maintance kit is still in good shape. (its the yellow roller on the right side of the printer. Well hopefully this helps .
The best way to tell if your problem is clogged jets, or bad maintenance kit, or something blocking jets. Is to look at light stripes test, and see if missing jets are all in a straight row or all over the place. If the missing jets number less that 10 you can use jet substitution to avoid the streaks. If you are using Media Sciences or some other after market ink, check that most of your problems are not in the cyan area. Media Sciences produced a bad batch of cyan which clogged the jets pretty bad. The good news is that if their ink caused the problem they will pay for some one to come out and replace your printhead. If you LST (Light stripes test) has a smear the entire vertical lenght of the page. You have either a bad maintenance kit, or a piece of paper, lable etc..rubbing against the drum while printing
Replace the maintenace kit and then in the menus run eliminate light stripes and eliminate smears.
There really isnt much else to do.
What you do when you run the light stripes and smears modes the machine removes all the ink from the print head, turns on a compressor and blows out the jets on the print head.
There really isn't a "cleaning " procedure as with a laser printer. If the maintenance kit is good, it pretty much maintanes itself.
Resolving white, light lines or streaks (eliminate light stripes)
From the printer, print the Troubleshooting Print Quality Pages.
With Troubleshooting highlighted, press the OK button. Scroll to Print Quality Problems by pressing the Up or Down Arrow button. Press OK.
Scroll to Troubleshooting Print Quality Page. Press OK. Evaluate the Light Stripes Test page for missing printhead jets (missing cyan, magenta, yellow or black color bars).
Clean the maintenance unit's wiper blade and empty the waste tray. A dirty maintenance drawer wiper blade can cause white lines and weak or missing printhead jets. Using a clean lint-free cloth or a paper coffee filter, gently clean the blade with a wiping motion across the entire length of the wiper blade.
Hi jbasset285: Your printhead may be bad do to third party ink.
Try these steps first.
Diagnosing Print-Quality Problems
The Troubleshooting Print-Quality Page provides a good overview of the most
common print quality problems. To print the Troubleshooting Print-Quality Page,
follow these steps:
1. From the Control Panel, scroll to Troubleshooting, then press OK.
2. Scroll to Print Quality Problems, then press OK.
3. Scroll to Troubleshooting Print Quality Page, then press OK.
The Troubleshooting Print Quality Page includes instructions for printing the
Eliminate Light Stripes test print. These instructions are also provided on the next
page of this manual. The Eliminate Light Stripes test print indicates individual weak
or missing jets or an obstruction in the imaging path that affects a vertical band down
the entire page. Also, you may see color variation from jet to jet on the Eliminate
Light Stripes test print. Some variation is normal, occasionally occurs, and usually
self-corrects within a few printed pages. If a print-quality problem is not resolved
with the information provided in the Diagnosing Print-Quality
Appropriate cleaning procedures, as listed in the following tables, should be
performed when specific print-quality or paper transport problems occur.
All cleaning procedures are detailed in the printer’s Phaser 8400 Reference Guide or
the Phaser 8500/8550 User’s Guide.
Light Stripes or Missing Colors
Problem type Solution
Missing or light-colored
stripes on prints.
Select the automated procedure Eliminate Light Stripes from
the Control Panel.
Ink Smears, Oil Spots, or Random Ink Streaks
Problem type Solution
Ink smears on the front,
back, or edges of a page.
Select the automated procedure Remove Print Smears from
the Control Panel.
Check the maintenance kit for ink and paper-dust build-up on
the wiper blade.
Oil (drum fluid) on top edge
of print.
Select the automated procedure Remove Print Smears from
the Control Panel.
You need to remove the maintanence kit and clean the wiper blades there and where the paper comes out of the machine at the top. See below and check when your maintenance kit runs out and how to replace it!
You can go into the trouble shooting menu and do the "eliminate Light stripes" procedure a few times. Then you can do Jet substitution from the same menu. If that does not work then most likely you need a new print head. If you have used non xerox ink sticks that is your most likely cause of the problem. cheaper is not always better
Thanks for trying.
Specifics almost identical. How do you access Jet Substitution?
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