Top 20 Kyocera FS-3900DN Laser Printer Questions & Answers

You first need a HEPA vac. Toner is considered a carcinogen.

Kyocera... | 97 views | 0 helpful votes

The user name is : Admin
password is : Admin

if the command center asked for password only then it is : admin00

Case sensitive for all.

I’m happy to help further over the phone at

Kyocera... | 212 views | 0 helpful votes

Error 7410 is drum unit not installed properly if you open the side door and push the the drum unit back in to place it probably just popped out of position a little bit

Kyocera... | 57 views | 0 helpful votes

Drum unit non- installing error The drum unit is not installed or not installed properly. The drum PWB EEPROM does not communicate normally.

Kyocera... | 103 views | 0 helpful votes

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.
Type in the brand name of your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts. It will make surf easy.

Kyocera... | 53 views | 0 helpful votes

sounds like invers is turned on which switches everything black will be white and white will be black try to find this seting and turn it off

Kyocera... | 414 views | 0 helpful votes

Defective Fixing Unit... Poor contact in the thermistor connector terminals, bad thermistor, broken heater lamp wire or some other contact problem related to fixing section. If it is possible, check with another Fixing Unit.

Kyocera... | 1,761 views | 1 helpful votes

are you asking for the password the default passwords are either Admin or admin00 that is for the web page on the machine its usally Admin or the speed of the mACHINE PLUSE TWO zeros

Kyocera... | 431 views | 0 helpful votes

It might be the main charger (MC-310 or MC-320) or the ground of the developer unit. In the first case, just remove the roller from the drum unit and clean it. In the second case, you have to remove the engine pwb (the board under the printer) and check the spring which grounds the developer unit.

Kyocera... | 38 views | 0 helpful votes

Power off the printer, open left door and press in the drum unit (press in the area just above the square button) until it clicks into place. Close the door and power on.

Kyocera... | 32 views | 0 helpful votes

Open the left cover and push the drum unit inside (above the waste toner bottle) to lock. You will hear a sound like "click". If you cannot push the drum unit, you can first remove the developer unit.

Kyocera... | 18 views | 0 helpful votes

Power the printer off. Open left door and push in on drum unit until it clicks into place. Power the printer back on and the code should be cleared.

Kyocera... | 136 views | 2 helpful votes

The lines are more than likely caused by either the Drum, Developer or Fuser unit. I have found in many cases that if non genuine toner is being used this will give you poor quality images. You can try using genuine toner which may resolve your issue but you may have to run a few hundred prints to clear out the old toner before the image improves.

Kyocera... | 85 views | 0 helpful votes

user:Admin pass:Admin User:admin pass:admin00

Kyocera... | 47 views | 0 helpful votes

Here is a link where you can download the documentation for your printer. Click on the link for your model, then the "documentation" tab. Then download what you want from there. Hope this helps.

Kyocera... | 28 views | 0 helpful votes

The drum unit is not installed properly. open the left door remove the toner wast bottle puch on the gray little plastic to remove the drum unit rienstal the drum unit firmley,instal the wate bottle back close the left door,and hopffuly will work

Kyocera... | 30 views | 0 helpful votes

I'll need a bit more info. What is the display message, and what does the machine do when you power it on?

Kyocera... | 34 views | 0 helpful votes

Most probably the drum unit has shifted slightly out of position. Remove the toner/process unit, open the cover on the left side of the machine, Remove the waste toner bottle. You will see a grey release button for the drum unit, press it in, slide the drum unit out a couple of inches and slide it back in firmly so that it seats and clicks in completely. Reinstall removed parts. Should be good to go.

Kyocera... | 22 views | 0 helpful votes

Update the print driver to the latest version by downloading from

Kyocera... | 87 views | 0 helpful votes

Not finding what you are looking for?
Kyocera FS-3900DN Laser Printer Logo

189 questions posted

Ask a Question

Usually answered in minutes!

Top Kyocera Office Equipment & Supplies Experts

Tareq Bin Mostaq...
Tareq Bin Mostaq...

Level 3 Expert

1449 Answers


Level 3 Expert

1363 Answers


Level 3 Expert

85216 Answers

Are you a Kyocera Office Equipment and Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

FS Kyocera

  • FS Kyocera

Most Popular Question

error call service 4000 00433933

  • Office Equipment & Supplies