Question about Xerox Phaser 8400 Laser Printer
I have an old unit that worked perfectly except for the Cyan color. Was told that I would need a whold new print head for $800. So I purchased a used machine on ebay that had a good printhead and swaped the printheads myself. now I am getting the error message 04.025.46.40803. I live in a VERY remote part of N. New Mexico, closet repair shops are over 2 hours away therefore the "do it yourself" method!
This fault code indicates a problem with the process control system. The machine cannot successfully home the transfix mechanism.
Check for obstructions around the printhead. Look for ink shards in the gears of the tilt drive. Check the printhead wiring harness to make sure it is not blocking the printhead movement (left/right & front/back). Remove the waste ink tray and look for ink build-up.
Check the process drive gears for damage. Ensure the gears are correctly aligned and homed.
Check the nose cone alignment on the X-Axis motor. Is the nose cone aligned with the printhead shaft (left/right movement).
When you removed the square metal block from the printhead shaft on the Left side, did you reinstall it with the "dot" in the same orientation as the diagram above it shows with a check mark?
Posted on Mar 16, 2014
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Posted on Jan 02, 2017
SOURCE: xerox phaser 8400
Replacing the pring head.
1. Remove the side covers.
2. Remove the ink loader assembly. There are 2 connectors on the ink loader. SO remove it slowly.
3. Remove the spring guides on the print head. One on each side, Held in my one torx screw.
4. Remove the spring bracked assembly on the left side of the printer, it puts pressure on the XY axis motor to position the print head. Just pop it off and position it up and to the left of the bracket.
5. Remove the steel square block on the left bottom side of the frame.
6. Unplug the harness and ribbon cables and then from the back of the printer, remove the print head, be careful not to hit the drum.
Install the print head, the ribbon cables are somewhat difficult to plug back in, Just be patient. and make sure they are conneted firmly. Also when replacing the cables and harness, be sure they are routed corectly so the print head does not get bound on them.
Set the print head into position and install the steel block, then the spring bracket on the XY motor, then the spring brackets in the proper positions. Dont forget to put that spring bracket back on, It is easy to over look.
Make sure all things are plugged in on the print head.
Next reinstall the ink loader, make sure all connectors are connected.
Install the covers and you are done.
Take your time, probably should take about an hour. Just to it carefully and methodically.
Posted on Nov 28, 2007
SOURCE: 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.
Posted on Feb 12, 2008
SOURCE: XEROX 8550 7,010.43 error code
There is a print block located on the left side of the machine looking from the front. It is near the bottom of the machine, Staineless steel, about 1 inch square.
It normally has ink in it and causes the print head to pivot slow.
You have to pull the spring holder up and to the left, remove that block and clean it well. That should resolve your problem.
You want to remove as much excess around the block as you can.
Posted on May 07, 2008
SOURCE: XEROX 8550 7,010.43 error code
Your printhead is stuck in the tiltposition,or is not able to tilt forward to the print position, due to another problem with a motor
7,010.43: The printhead is stuck in the tilted position, or is not able to tilt forward to
the print position, due to problems.
7,011.44: This is a soft fault, and will not halt the printer.
7,012.45: The drum transfix home sensor is still in a not homed position, after the
return home motion has been completed.
7,014.47: The printhead is not locked in the head tilt restraint spring.
7,015.43: The head tilt restraint spring is out of place.
Step Questions and Actions Yes No
1 1. Reboot the printer.
2. Did this correct the problem?
Complete. Go to Step 2.
2 1. Do the printhead lock arms rotate correctly? Go to Step 3. Repair/replace
the lock arms.
3 1. Has ink spilled ink around the printhead that
prevents the printhead from moving to its
center position? You should be able to
manually push the printhead right to left.
Go to Step 4.
4 1. Does the X-axis motor drive the printhead to
it’s center position (so it can tilt forward)?
Go to step 5. Troubleshoot
5 1. Check the process gearbox for obstructions
2. Ensure the gears are correctly aligned and
3. Verify the process shaft and drive module
shaft are at their home positions.
4. Did this correct the problem?
Complete. Go to Step 6.
6 1. Has ink spilled on the head tilt gear on its
drive train (near left side of the printhead).
Go to Step 7.
7 1. Use service diagnostics to run the Head
Maintenance Wiper Clutch test.
2. Did the test fail?
Go to Step 8.
8 1. Ensure the wiper is properly aligned.
2. Use service diagnostics to run the Wiper
3. Did the test fail?
Replace the exit
Go to Step 9.
9 1. Use service diagnostics to run the Load
Maintenance Clutch test.
2. Did the test fail?
Posted on Jan 09, 2009
2. Run the Test Tray 1 Width Sensors.
3. If the test fails replace the front door.
4. Replace the I/O board.
2. Check for an obstruction or damage in the process gearbox.
3. Ensure the gears are correctly aligned and homed. If faulty replace the process gearbox
4. Run the Tilt Axis Drive test to test the headtilt.
5. Run the Head Maintenance Wiper Clutch test. If the test fails, replace the wiper drive clutch.
6. Run the Wiper Axis Drive test.
7. Replace the exit assembly.
2. Verify the lock arms rotate correctly.
3. Check for spilled ink around the printhead.
4. Check the process motor gears for damage. Ensure the process gears are correctly aligned and homed.
5. Verify the process gear box, process shaft, and drive module shaft are at home position.
6. Verify the headtilt gear will engage, see the home positioning procedure on page. You can manually engage the headtilt gear.
7. Run the Tilt Axis Drive test.
8. Run the Process Motor test.
9. Run the Head Maintenance Clutch test, if the test fails replace the clutch.
10.Run Wiper Drive test. If this fails inspect the wiper drive system.
Posted on Jan 30, 2010
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