20 Most Recent Xerox Phaser 6125 Laser Printer Questions & Answers

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Xerox Phaser... | Answered on Feb 08, 2020

042-372 K Mode Sol Error Restart Printer Error 042-372 Restart Printer Each color has it's own solenoid. the K solenoid is the one for the black ink. It may be that toner has clogged the sensor on the inside right wall of the printer. Sensor hole is a small opening and K is the first hole. Clean it with a cotton swab and alcohol. clean any loose toner also. If this does not take care of it. The sensor board or the solenoid itself needs to be replaced.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response

Thanks, Joe

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

Xerox Phaser... | Answered on Jan 05, 2019

From the service manual:

Troubleshooting Procedure Table
Step Actions and Questions Yes No
1 Check the Laser Unit for correct
Is the Laser Unit correctly installed?
Go to step 3. Reinstall the
Laser Unit. Go
to step 2.
2 Cycle the power.
Does the error still occur?
Go to step 3. Complete.
3 Check the wiring harness connectors
P/J40, P/J41, P/J411, and P/J412
between the MCU Board and the Laser
Are the connectors securely
Go to step 5 Reconnect the
connectors. Go
to step 4.
4 Cycle the power.
Does the error still occur?
Go to step 5. Complete.
5 Replace the Laser Unit (page 8-31).
Does the error still occur?
Replace the
MCU Board
(page 8-59).

Xerox Phaser... | Answered on Sep 19, 2017

how to fix invalid black message after replacing a toner And I have the same problem. I buy 4 new toners and for each one i get notice from xerox 6125 invalid black, or invalid yellow. What do I need work?

Xerox Phaser... | Answered on Apr 06, 2016

The toner holders are each sold separately, the part numbers are 604k44920, 604k44930, 604k44940, and 604k44950.


Xerox Phaser... | Answered on Jan 15, 2016

hi.it could be your print cartridge.end of life.and very costly

Xerox Phaser... | Answered on Sep 24, 2015

If the paper size is correct in the printer and the printer and it's possible to print off a test print in both the printer control screen or directly from the print driver utilities if that works then the only thing I can suggest is the item you want to print is defaulted to a different size. i.e. Check that the word processor your using is set to the size you have in the printer. Imperial size pages will look very similar on screen as does the A4. Printers don't automatically fix paper print sizes you just have to check and recheck for differences. Removing the tray only reafirms to the printer that the size might be incorrect and your going to fit the correct size.
As for the red light all printers behave differently in certain error conditions. Have you also tried to print out something you printed at a time the printer was working correctly. In other words try printing out a different file. Maybe, trying to print off a test print of one line of the alphabet, and then go from there.
Good luck,

Xerox Phaser... | Answered on Apr 02, 2015

Could be a bend or bad contact, check to make sure that all the metal contacts that touch the cartridge are in good shape. You could also have a clogged waste toner bin on the printer. Or possibly a bad high voltage power supply.

Xerox Phaser... | Answered on Mar 10, 2015

This would normally be the cleaning unit to blame. If in doubt go,to the Xerox.com website and investigate further.
Good luck.

Xerox Phaser... | Answered on Mar 09, 2015

If you can address the printer through CentreWare then your halfway there. Is now possible to print a test print via CentreWare if that works look at your p.c, driver setup.
Good luck.

Xerox Phaser... | Answered on Mar 08, 2015

Besides setting it for card stock both in its internal menu and the pc's menu, are you setting it for legal size paper? The timing will be thrown off if that step is missed. It will stop pulling the paper because it is looking for 8.5 x 11" paper. I would test with less expensive card stock to also make sure a shard of the decal paper did not get left in the paper path. The card stock should help dislodge any debris in the paper path.

Xerox Phaser... | Answered on Jan 02, 2015

One of the drums in the imaging unit is not working properly so you might have to replace the imaging unit

Xerox Phaser... | Answered on Dec 09, 2014

It's the magenta drum that's causing the problem so you'll have to replace the imaging unit.But first try removing the imaging unit and cleaning the laser windows and the metal contacts.

Xerox Phaser... | Answered on Dec 09, 2014

Hi again Jan,
It is possible that your drum but to be sure, get a trained Xerox Technician to check it out...

There is still a possibility that it is something else entirely, so getting a technician out would be the best bet... Sorry I couldn't give more of a definitive answer. Sometimes things need to be seen in real life to diagnose properly.

Xerox Phaser... | Answered on Oct 27, 2014

If it is a genuine magenta cartridge then try a drum refresh...

On the control panel of the printer: start the menu
Choose Admin Menu \ Maintenance Mode \ Drum Refresh

Once it has finished turn it off and on again and see how it goes. You may have a faulty drum though or even a faulty transfer belt.
All the best!

Xerox Phaser... | Answered on Oct 27, 2014

Have you set the tray to thick cardstock in the printer?
If not try that. This will let thicker paper go through more easily.
Make sure you bot have the tray as the printjob set up as the same type of paper.
How much does the paper weigh?
Also try printing from the manual feed. You're paper path is shorter that way and easier for the printer to handle.
Does it only jam on this type of paper?
Might be a fuser easy but don't think that's the case with this one.

Xerox Phaser... | Answered on Apr 02, 2014

Sometimes the colors are off because certain (other) colored ink toner cartridge is low. See if you get the same results after you use new toner cartridges.

Xerox Phaser... | Answered on Mar 03, 2014

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