Question about OKI C9300 Led Printer

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Toner sensor problems

I keep getting a "cyan toner empty" and "cyan toner sensor error". I just replaced both the toner & drum and I still get the error.

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  • 8 more comments 
  • diane82871 Nov 13, 2007

    When you say transport are you referring to the transfer belt?

  • diane82871 Nov 13, 2007

    I tried that and it didn't work. And they are genuine OKI toners & drums. Anything else I can try?

  • diane82871 Nov 14, 2007

    I had aloat of hope for this one but.....when I did step one (holding the + & - while turning on the printer) the only display reading I got was OP MENU. By the way, there are 2 different + & - on my printer & I tried both of them but never got the OKIUSER message. If this helps, there is a silver label on the printer that says Model Number N31063A.

  • diane82871 Nov 15, 2007

    Hey.....I got through step 4 no problem...yeah!!! The road block came at step 5. As I use 2 to scroll, there are lots of options but "M TONER COUNTER" is not one of them.

  • diane82871 Dec 03, 2007

    I'm sorry I did not get back to you sooner. I was out of the office for almost 2 weeks and have been trying to play catch up since then. The sensor error message never went away, in fact, all the colors (except black) give the same message now but at least the toner low message is gone and I can print again. I do thank you for your help! I really did appreciate it!

  • Jonoh Jun 11, 2008

    I have a oki C7300 that will intermitently throw up a toner sensor error. I have changed drums to know avail.

    Can't fully understand how sensors work, anyone have any ideas ? thanks

  • Anonymous Mar 14, 2014

    oki pro 910

  • Anonymous Mar 19, 2014

    i want to stop every time load toner.

  • Anonymous Mar 30, 2014

    bizhub 601 keeps adding toner .have replaced drum, developer, and drun sensor

  • Anonymous Mar 30, 2014

    machine keeps adding toner. Have replaced drum .developer,and drum sensor



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On the base of machine after removing drums and transport, there are 4 sets of 3 pins that connect to left hand bottom of each drum, these can get toner on them and not make proper contact, each set of 3 pins just pop out with the help of a flat blade, out of base to be cleaned. in yout case just switch the set under the cyan with another lot from different colour.

I am taking it that you are using genuinne non imported oki drum and toner. If this doesnt fix your problem then you must have fauly drum/toner

Posted on Nov 13, 2007

  • 7 more comments 
  • Soulvisitor
    Soulvisitor Nov 13, 2007

    yes tranfer belt must be removed, two little clips at paper exit then lift via blu handle

  • Soulvisitor
    Soulvisitor Nov 14, 2007

    OK I've got my head around which OKI you have, there are so many and thet are so simular looking but each has it way, you have the old large A3 one, that thinks it is clever, with hard drive option, these still do the error I explained before but there is another story yet to be told... here comes what I think is your answer, I can feel it in my bones, make sure you post back and tell me...

    ..The toner counters will only be reset if a new toner cartridge is installed after the printer has displayed toner low. Installing a new toner cartridge before this message is displayed will have no effect on the counters. So maybe this happened and now the counters are wrong and have reached the upper point thus telling printer to hang on something is

    You could if brave and if you think this may be the case do a consumable each step properly and all will be reset to 100% life all drums and toners, that means that the indicators will all think they are full regardless of consumable actual status, so toner later will run out before machine prompts you with toner low, but counters will reset each time you replace a consumable when machine requests it.

    1) - Power ON printer while holding both the + & - buttons until “OKIUSER” message appears in LCD.
    2) - Press + or – button until “ENGINE DIAG MODE” is displayed.
    3) Press "ENTER", displayed will be "DIAGNOSTIC MODE XX.XX.XX S-MODE"
    4) Press + or – button until “NV-RAM INITIAL” is displayed.

    Half way, dont stop too long it will time out....

    5) Press "ENTER" again.
    6) Will appear "TABLE 1" message.
    7) Press "ENTER" until "EXECUTING RESET" message appear. .....
    ..........the "NV-RAM INITIAL" message will BLINK.

    Tada....This procedure reset TONER, DRUM, FUSER and counts

    8) power OFF printer, wait 10 sec, and power ON again..

    P.S. (not related to problem but to 9300 viewers of future)

    To access Service Mode in C9300 power ON printer with 0, 1, 6, 7 at same can do some good damage in there!! (I warned ya!)

  • Soulvisitor
    Soulvisitor Nov 15, 2007

    Yes op menu is good, can you then cycle threw menu till u see engine or diagnostic mode? Continue with steps as posted if possible, if not let me know and I'll go and drag a old one down and plug it in to post exact wording.

  • Soulvisitor
    Soulvisitor Nov 15, 2007

    NEW INSTRUCTIONS: cause OP Menu is wrong menu, sorry, there are just too many OKI's so simular but all different and I dont see these often anymore, they have just about died off now.

    Resetting consumables for OKI C7300,C7500,C9300 printer I think!

    1. Hold buttons 0 + 1 + 6 + 7 on startup.

    2. Press button 0 several times until "DIAGNOSTIC MODE xx.xx.xx" shows.

    3. Hold buttons 2 + 3 until "ENGINE DIAG LEVEL 4" shows.

    4. Press button 1 to scroll to "COUNTER SET".

    5. Press button 2 to scroll through menu items (button 6 scrolls backwards) You want the "M TONER COUNTER"

    6. To alter the value of an item, first press button 3 to select the digit to be altered. The selected digit will slowly flash. (Button 3 moves to the right through the digits. Button 7 takes you to the left.)

    7. Then press button 2 to increase the value of the selected digit. Press button 6 to decrease the value.

    8. When the changes have been made hold buttons 1 + 3 + 5. The screen will flash three times and then an * will appear on the right of the screen. The new value is set.

    9. To leave the counter set menus, turn the printer off.


    Each colour toner counter shows life as percentage used. So a toner showing 30% has used up 30% of its toner. 100% would indicate a near empty toner. This is the reverse of the toner life shown from the "usage menu" when the printer is in normal operation, which shows the toners as a percentage life remaining. You will want toner showing 00%.

  • Soulvisitor
    Soulvisitor Nov 15, 2007

    Sorta Yeah... it might be called Magenta dot counter

  • Soulvisitor
    Soulvisitor Nov 16, 2007

    Instead of step 3 change it to

    3) HOLD 0 + 4 "ENGINE DIAG LEVEL 2" shows

    4) Press 1 to cycle to "fuser unit"

    5) 2 to scroll to MAGENTA TONER


    no wonder I always hated this model, japanesse english instructions are hard to understand.

  • Soulvisitor
    Soulvisitor Nov 16, 2007

    oops make that Cyan not Magenta...see I'm becoming japanesse myself!

  • Soulvisitor
    Soulvisitor Nov 16, 2007

    When you change a toner is should do this reset automaticly, but I've had many customers tell me it doesn't if it is replaced before machine says replace toner, it starts by just saying toner low or order toner, but one should wait untill they see replace...

    OKI are painfull to work on but are better on later models, their print quality is great.

  • Soulvisitor
    Soulvisitor Dec 02, 2007

    Thanks for rating!


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Resetear fusor de Okidata C5500

Posted on Oct 08, 2008


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Posted on Jan 02, 2017

SOURCE: toner sensor problems

Hi i have the solucion a error of sensor black oki c3100. For two times i have the problem and a long time study the problem. it´s the solucion. Because i spanish the solution is in spanish languaje.
Desmontar la tapa semitransparente redonda del lateral.
El sensor lleva un iman incorporado que dice a la impresora cuando el toner se a agotado. El polvo de impresion lleva impurezas o las ponen a proposito y hacen que el iman no pueda levantar la leva que hace contanto con el sensor. Con un destornillador limpiar las impurezas que estan pegadas al iman por dentro del toner. Cerrar y listo. YA FUNCIONA JAJAJAJAJAJAJAJA.

Posted on Apr 25, 2008

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