Question about Kyocera FS4020DN (A4) Workgroup Mono Laser (Duplex+Networked) 128MB 1200dpi 45ppm 600 Sheet Printer

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Kyocera FS4020DN won't add ink

I just replaced the drum and developer in my Kyocera FS4020DN and put in a new toner cartridge. It says "Original toner installed" and won't add ink - copies are blank.

Posted by Anonymous on


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Posted on Jan 02, 2017

  • 40 Answers

SOURCE: Kyocera 1810 drum replacement

If you have some mechanical skills and a steady hand you can change the drum. However it worth the money to pay a "pro"to do it. Also you may want to replace the cleaning blade too.

1. Open the front cover - where the toner is.
2. Remove the black cover - 2 screws
3. Remove a little stopper at the bottom of the drum unit + 1 screw
4. Disconnect the drum unit cable.
5. Take off 2 screws which secure the Drum Unit.
6. On top of the Drum unit you should see 2 white plastic stoppers - front and back side ends - You have to push them inside to keep the cleanng blade away from the drum.
7. Remove the MCH assembley - 1 screw.
8. Remove the front separation claws + plate - 2 screws.
9. Remove the Drum Shaft
10. Replace the Drum

There are few details about how to manipulate a Drum - Do not touch the surface, do not expose it to intense light...


Posted on Jan 12, 2009

  • 66 Answers

SOURCE: i already replace a new toner but there an error msg AP

The AP message indicates thet the dev is so low in toner that the machine has to go into a full cycle mode to get the toner levels up.
The error code is telling you that one cycle is not enough. you will have to turn the copier off/on and cycle it at least one more time....more if neccessary

Posted on Jun 22, 2009

  • 622 Answers

SOURCE: Kyocera FS-3900 and FS-4000 Prints very faint. New printers affected

sounds good

Posted on Dec 24, 2009

  • 200 Answers

SOURCE: my kyocera km 1500, it says

E33 means the copier is out of toner. Try tuning off and let it cycle a few times, if you ran it completely out some times it takes a few cycles to get running again.

Posted on Feb 18, 2010

  • 200 Answers

SOURCE: Instructions required to replace the maintence kit

You must unplug your printer before doing any work and be very carefule not to damage any of your parts.

(1) Precautions

Be sure to turn the power switch off and disconnect the power plug before starting disassembly.

When handling PWBs, do not touch connectors with bare hands or damage the PWB.

Do not touch any PWB containing ICs with bare hands or any object prone to static charge.

Use only the specified parts to replace the thermal cutout. Never substitute electric wires, as the printer may be seriously


When removing the hook of the connector, be sure to release the hook.

Take care not to get the wire caught.

(2) Drum

Note the following when handling or storing the drum.

When removing the drum unit, never expose the drum surface to strong direct light.

Keep the drum at an ambient temperature between 0 °C/32 °F and 40 °C/104 °F and at a relative humidity not higher than

90% RH. Avoid abrupt changes in temperature and humidity.

Avoid exposure to any substance which is harmful to or may affect the quality of the drum.

Do not touch the drum surface with any object. Should it be touched by hands or stained with oil, clean it.

(3) Toner container

Store the toner container in a cool, dark place.
Avoid direct light and high humidity.

(1) Detaching and refitting the developing unit


1. Open the top cover.

2. Open the MP tray.

3. Remove the developing unit.

4. Check or replace the developing unit and refit all the removed parts.

(2) Detaching and refitting the drum unit


1. Remove the developing unit.

2. Open the left side cover and then remove the waste toner box.

3. Unlock the drum unit lock and then remove the drum unit.

4. Check or replace the drum unit and refit all the removed parts.

(3) Detaching and refitting the fuser unit


1. Draw the rear unit.

2. Insert a flat-blade screwdriver to push the fuser lock (gray colored) on the rear unit and the fuser unit is separated from the rear unit (rails).

Do it both ends of the rear unit.

3. Check or replace the fuser unit and refit all the removed parts.

Place the fuser unit on the rear unit (rails) and push the fuser lock so that the fuser lock catches the fuser unit.
Do it for the both ends of the fuser unit.

(4) Detaching and refitting the transfer roller and separation charger brush unit Procedure

1. Remove the developing unit.

2. Remove the drum unit.

3. Slide the paper chute guide and unhook the hooks.
4. Remove the paper chute guide.

5. Remove the shaft (transfer roller) from the both bushes.

6. Release four latches and then remove thecseparation charger brush unit.

7. Check or replace the transfer roller and separationccharger brush unit and refit all the removed parts.

CAUTION: Note the following, when refitting the separation charger brush unit.

A. The separation charger brush unit is inserted into the two projections of the frame and does not run on to the projections.

B. The separation charger brush unit is firmly in contact with the separation charger plate of the frame.

The last things to replace would be your rollers which just pop in and out.

Posted on Jan 22, 2011

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U may get this error message if the developer unit is not install properly after u replace a new toner container. Just lift the developer unit together with the toner container out of the printer and then insert back properly into the machine.

YBC (/\)

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