Question about Brother MFC 420CN All-In-One InkJet Printer

1 Answer

420CN waste tank


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  • 7 more comments 
  • CHOWINI Nov 16, 2007

    in the last three poctures it shows the ink supply above the print head, How do I take it off so that I can get the print head out to wash ? Thanks. P.C.

  • CHOWINI Nov 17, 2007

    Do you know where I can get waste tank and print head fro this printer ?

  • CHOWINI Nov 17, 2007

    O.K. so how do I take the top part of to change the print head ?

  • CHOWINI Nov 17, 2007

    I can see the white thing ,is that the PH ? I try lifting it up but it will not let me,is there a trick to lift it up ? or how do you take it out ?
    Now where can I get a new one to replace it ? Thanks.

  • CHOWINI Nov 17, 2007

    O.K. The white thing is the purge station the one that move is the PH,now how do I take it out ?

  • CHOWINI Nov 17, 2007

    I want to change the PH if needed,where can I get parts for this printer ?

  • CHOWINI Nov 17, 2007

    Can I get parts from other co,panies,othere than Brother service centre ?

  • CHOWINI Nov 20, 2007

    Now I have Machine Error AF WHat is that Mean Thanks.

  • CHOWINI Nov 21, 2007




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Its the 7th picture waistinktank: "ALTTINTENTANK"

Posted on Nov 16, 2007

  • 5 more comments 
  • Mix-it-up
    Mix-it-up Nov 16, 2007

    You cant wash the printhead. This wont be successful because the ph construction wont let any fluid within the channels inside the ph!
    The ph is a piezo one and no bubble jet. This means that the ph has electric besides the nozzels.

    The cleaning has to be done by the ink cleaning cycles.
    What you can try is to refill some ph cleaning fluid into the carts (its OK 
    when it is mingled with ink).

    Missing dots/colors at the test print can happen because of:

    - air bubbles inside the capillaries/ph (several cleaning cycles will do wonder)

    - rotten valve at the ph side (cant be fixed; very common error due to generic ink)

    - rotten nozzels (due to generic ink. cant be fixed)

    - pigmented ink (generic ink) has clogged the filter infront of the nozzles (cant be fixed)

  • Mix-it-up
    Mix-it-up Nov 16, 2007

    What you can try:
    Take some DROPS of printhead cleaning fluit inside the white squares of the rubber of the purge station (forlast pic. at the link in the first post) and let the ph sit a few hours within the cleaning solution.

  • Mix-it-up
    Mix-it-up Nov 17, 2007

    Simply turm thone of the three white gear wheels once around now the ph is unlocked. push it towards the middle. The purge station is now reachable.

  • Mix-it-up
    Mix-it-up Nov 17, 2007

    simply push the ph to absolut left side (were the gear wheels are). here you can pull it out of the rail. 
    BTW what do you want to do? You cant clean the ph! Its waisted time.

  • Mix-it-up
    Mix-it-up Nov 17, 2007

    brother service dealer near your home can be found on the homepage from brother of your country

  • Mix-it-up
    Mix-it-up Nov 17, 2007


  • Mix-it-up
    Mix-it-up Nov 20, 2007

    You have to connect the scanner flat cable to the circuit board.



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Dr. P,
Printer will display "Waste Toner Tank Full/Not Installed" error message if the waste tank is full of toner or not installed.
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If you have user guide, it will show you how to install the waste toner tank.

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This tank pulls out easily and has two holes for excess toner to flow into it.

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If done properly, the error should go away and you should be able to continue printing. I have doen this and it works fine.

(Some posts have had people cut this part of the tank off and simply tape over the hole that is made with strong tape. This bypasses the sensor and would allow the printer to run again. I have not done this as I do not want the possibility of toner spilling in my office.)


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Mirror images after downloading drivers

Dear Sir,

It seems to be problem with printer not with your leopard.
so follow these steps
1.check your printer catridge,make sure that ink is full.
2.If printer catridge is good then align printer catridges,you can find alignment option in in printer setting or properties page.
3.If above mentioned steps not solves your problem then may be your printer ink waste tank is may need to replace waste tank,if your printer is new there is no question of waste tank.
i think it helps
if you find any difficulty leave a feedback regarding this issue,we will glad to assist you.

Have a nice day!
good luck

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