20 Most Recent OKI C3400n Laser Printer Questions & Answers


I have an Oki C3400 that wont print

Could very well be the sensor window. I suggest looking at the side of the drum on the right side and pushing a q tip into the opening. heres an older model thats sort of similar instructions. http://www.c3400.co.uk/index.asp?menumode=0&content=sensorerror
Also you can check the exact error code here. http://www.okic3400.co.uk/library/downloads/utilities/c3300c3400smv1115.exe
3/2/2020 7:58:53 PM • OKI C3400n Laser... • Answered on Mar 02, 2020

Pc says could not connect printer to usb

Hi. You may have to reinstall driver software.
1/10/2018 2:41:08 PM • OKI C3400n Laser... • Answered on Jan 10, 2018

Faint area down left side of page

When you say "Cleaned the lens" I presume you mean the four LED print heads. Use a spirit to clean them with if the toner dust is hard to remove. I usually just use a finger and wipe the entire length. Make sure there is no foreign item laying on the drum top where the black plastic film is as the led head may not seat properly on it. Clean all the silver high voltage springs down the left side of the printer. They make contact with the drums. If you still have a problem then try printing solid colour blocks ie Yellow, Magenta ,Cyan and Black . This will identify which colour is giving the problem . Change that drum and all should be well.
7/26/2017 7:38:17 AM • OKI C3400n Laser... • Answered on Jul 26, 2017

C3400 will not print black.

I would call okidata for technical support.
1/19/2017 10:27:29 AM • OKI C3400n Laser... • Answered on Jan 19, 2017

Can I reset the belt

How to reset your OKI C3300 C3400 C3600 laser printers ...

? 2:40 https://www.youtube.com/watch?v=czyqKMpy2-E Oct 6, 2014 - Uploaded by Toner Man How to reset your OKI C3300 C3400 C3600 laser printers drum unit ... drum message you can install the chip on your drum unit and continue printing. ... Replacing the Transfer Belt on an OkiC3000 Series Printer - Duration: ...
11/26/2015 7:23:48 PM • OKI C3400n Laser... • Answered on Nov 26, 2015

I have an OKI C3400 color laser printer. Can the

The counters reset when you install the new drums. Did you purchase Oki drums or were they after market drums..that could be the problem.
11/26/2015 7:19:21 PM • OKI C3400n Laser... • Answered on Nov 26, 2015

Any way to reset the toner empty sensor on C 3400?


You can try taking out the complete toner & drum assembly for the Cyan (or any you have this problem with). To do that you open the top and just lift the recalcitrant assembly straight up. Once it is out, with it oriented exactly as you lifted it out, look on the RIGHT end of the assembly for a small rectangular window - about 1/4" square. It should be about 3/4" below the two metal contact points on that end - near the top that you lifted out about the same level as the toner itself. In that hole, if it looks like the opening is covered (just inside) by a bit of black plastic, take a pointed object (like a straightened paper-clip) and try gently to lift this plastic piece UP - don't stick the clip in too far. If you gently do this (may take a try or two) that piece of plastic should stay UP - allowing you to see a bit farther inside. Replace the assemble, close the door and let the printer recycle.

Just to help you understand what may be happening - this little piece of plastic is supposed to start in the UP position when the toner is new. Eventually, as the toner becomes used up, the piece of plastic is designed to gradually drop down and eventually block the sensor - indicating to the printer that the toner is spent.

I have had this happened to me several times with new toner cartridges - especially with the non-OKI OEM knock-off "compatible" toners. This has always worked for me - but no guarantee it will for you!

The other possibility of course is that you actually have a bad toner, which trying this should help to confirm.
3/22/2015 6:26:16 PM • OKI C3400n Laser... • Answered on Mar 22, 2015

Hi. I get a message saying printer connection

you have to install 3400 driver.
3/22/2015 6:24:42 PM • OKI C3400n Laser... • Answered on Mar 22, 2015

There is no error showing up but streaks of red and blue on printer papr

Uninstall and install the cartridge and do a re-alignment, this should help.
1/16/2015 2:49:06 PM • OKI C3400n Laser... • Answered on Jan 16, 2015

Can not turn on?

check power cord (sounds silly but it has happened to me) if not could be a bad power supply.
12/17/2014 5:49:14 PM • OKI C3400n Laser... • Answered on Dec 17, 2014

Close cover 310: cover open, but it isn't


had the same problem. It is easily fixed.
On my printer a OKI C5750 is had to main covers, at the front (which you have to open to fix a paper jam) and a big cover on top (which you need to open to replace toners).
On the left is a piece of plastic which (when closed) presses on a switch.
When you open both covers, and close the top one, you can see it on the left when it comes down.

You can easily remove the error (only for a brief moment) by prushing the shining metal switch to the back.

But the problem is that one of the rollers is in a wrong position.
So just take a flat screwdriver and press on the bottom roller, and it will click and the problem will be gone when you close the covers.

7/14/2014 6:52:21 AM • OKI C3400n Laser... • Answered on Jul 14, 2014

Can i reset the drum life on an oki c3400?

On Oki C3200, there are only 2 terminals on the RH end of the drum -- those are the two you need. I had trouble getting the wire tucked under the terminals on the drum. What I did that worked was just hook the wires to the spring contacts on the printer frame. Put a piece of black tape over the metal frame just to make sure no short between the frame and the wire. I also found a piece of black tape to retain and keep some tension on the wires worked well. Analog VOM worked just as advertised -- thanks so much for a quick, easy, no-cost drum reset solution. Photo attached. e5e98aa4-e915-446a-9de5-b439a26aab96.jpg
2/27/2014 11:29:08 PM • OKI C3400n Laser... • Answered on Feb 27, 2014
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