Question about Xerox Phaser 8400 Laser Printer

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Jet substitution How do you run jet substitution on the Phaser 8400? How much $ am I looking at to replace the print head?

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  • john21212 Nov 11, 2008

    I have a Xerox 8400 printer with two blank magenta jets, 47 & 176. Cleaning does not clear out the problem. I tried Jet substitution, but the two black bars remain. Am I doing something wrong? Thanks, John

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You want to try something different.

1. Go to www.xerox.com
2. Click support and drivers.
3, In the search box type in Phaser 8400.
4. Select Drivers and downloads.
5 Scroll down and find Jetfix snipit, and download that, follow the procedure, maybe more than once.

The price from Xerox is $750 plus labor to replace the print head.
You can also look up service dealers in your area on the xerox website. Most will get you the print head and labor much cheaper. I emphasise the MUCH portion of cheaper...

Posted on Jul 10, 2008

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How to a remove a jet from the substitution list on a xerox 8400 printer.


Select 'Troubleshooting' and press OK. Select 'Print Quality Problems' and press OK. Press and hold the 'Up Arrow Button', and then press the 'Back Button'. Select 'Turn Jet Substitution Mode Off' and press OK. Note, if jet substitution has not been enabled, the option to turn it off will not be available.
Hope this helps.

Jan 20, 2011 | Xerox Phaser 8400 Laser Printer

1 Answer

I have tried to run the light strips program, have one color, magenta which is not filling in.


Use the Jet Substitution mode to compensate for missing jets.

If you have three jets missing in a row the jet substituion won't help
and a printhead replacement would be necessary.

One last thing is it the "SAME" jets missing after each LST (Light stipes
Test) or are they changing?

Nov 01, 2009 | Xerox Phaser 8400 Laser Printer

1 Answer

Phaser 8200 jet blocking II.


The Phaser 8200 does not have jet subtitution mode. That was first available on the Phaser 8400. You can try to force the jet to clear by making a cleaning page of your own. Make a document with a vertical stripe on the page in the position of the plugged jet in the exact color of the ink in question. Run 100 pages or so at the highest print quality.

Having faced over 100 solid ink printers, my experience tells me that it's hopeless. You'll probably never get that jet cleared. At the age of your printer, you should consider yourself lucky that it's only one. The newer models have ability to work through these types of issues built in.

Mar 21, 2009 | Xerox Phaser 8200 Laser Printer

1 Answer

Xerox phaser 8400 error code


That code is a jet heater code.The most likely problem is a bad print head, the second most likely bad item is the electronics module that supplies the 40-50 volt source to the print head heater.

Sep 22, 2008 | Xerox Phaser 8400 Laser Printer

1 Answer

I have a phaser 8400 banding problem. Actually reverse banding. It is ligher ink vertically along left margin and an inch from right margin. Is this a drum problem? It notes I am low on ink and have only...


nope its not a drum problem, That drum never goes bad. You are having a problem with some blocked jets in the print head.
You can scroll through your menu to troubleshooting and there are cleaning modes to eliminate light stripes and to eliminate smears.
Run the eliminate light stripes maybe 2 or 3 times. If that doesn't work, then try the jet substitution mode.
That is better described at Xerox.com, click support, then enter phaser 8400 in the search box, click support again and then enter
"jet" in that search and follow the directions.
If those do not work then your print head is most likely bad. Thats more likely if you have used non xerox ink sticks.Being low on ink should only give you a message that its low.

Aug 25, 2008 | Xerox Phaser 8400 Laser Printer

1 Answer

Xerox Phaser 8400N Printing Stripes


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..

Jul 08, 2008 | Xerox Phaser 8400 Laser Printer

1 Answer

Xerox Phaser 8400 light stripes


Your print head is in ned of replacement.
If you have done all you have, not much more that can be done.
You can try running that eliminate stripes a few times, and also in that area try the Jet Substitution, and see if you can open new jets to bypass the blocked ones.
after that, your print head would need to be replaced.
Wish I had a better and cheaper answer.

Jul 08, 2008 | Xerox Phaser 8400 Laser Printer

1 Answer

Xerox Phaser 8400 Streaking


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

May 28, 2008 | Xerox Phaser 8400 Laser Printer

1 Answer

Xerox Phaser 8500 not printing black


Here are the directions to enable and disable Jet Substitution. This may very well help.
Some of the print head jets will not unclog for you. If that does not work then most likely the print head needs to be replaced.

o enable the Jet Substitution mode:
  1. Press the [Up] or [Down] arrow button on the Control Panel to select [Troubleshooting] on the Display Screen, and then press the [OK] button.
  2. Press the [Up] or [Down] arrow button to select [Print Quality Problems], and then press the [OK] button.
  3. Press the [Up] or [Down] arrow button to select [Eliminate Light Stripes], and then press the [OK] button.
  4. If necessary, select [Print Light Stripes Test] to make a Light Stripes Test print that shows any weak or missing jet and its jet number.
  5. Press the [Up] or [Down] arrow button to select [Jet Substitution Mode], and then press the [OK] button.
  6. Press the [Up] or [Down] arrow button to select the color for the weak or missing jet, and then press the [OK] button to select the color.
  7. Press the [Up] or [Down] arrow button to select the number of the weak or missing jet (1 to 309), and then press the [OK] button to confirm the selection.

    NOTE: If necessary, press the [Up] or [Down] arrow button to select [Save Change and Select Another Jet] to substitute more jets.

  8. Press the [Up] or [Down] arrow button to select [Save Change and Exit] and then press the [OK] button to complete the procedure.

To disable the Jet Substitution mode:
  1. Press the [Up] or [Down] arrow button on the Control Panel to select [Troubleshooting] on the Display Screen, and then press the [OK] button.
  2. Press the [Up] or [Down] arrow button to select [Print Quality Problems], and then press the [OK] button.
  3. Press the [Up] or [Down] arrow button to select [Eliminate Light Stripes], and then press the [OK] button.
  4. Press the [Up] or [Down] arrow button to select [Jet Substitution Mode], and then press the [OK] button.
  5. Press the [Up] or [Down] arrow button to select [Turn Jet Substitution Mode Off], and then press the [OK] button.

Feb 16, 2008 | Xerox Phaser 8500/DN Printer

1 Answer

Clogged print head


What you can try is going onto the Xerox.com site and loading what is call Jet Substitution it will change the ports being used.
That could help.
Load it to your laptop and then run. Sometimes helps.
Unfortunatly that is a very expensive print head.

Feb 12, 2008 | Xerox Phaser 8400DP Thermal Printer

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