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

2 Answers

I admit it, I used cheapo refill ink! Now the black section of the print head doesn't work...

I admit it, I used cheapo refill ink! Now the black section of the print head doesn't work. I took the printer apart and flushed the black tube and return line with alcohol, then installed new BROTHER black ink cartridge, but still almost no black gets through: when I do image quality test print it manages to print 2 or 3 of the 24 or so dots that show up on the color squares. Can you tell me how to rescue this print head, or where I can buy a replacement?

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  • buddybob Jan 13, 2008

    Thanks for your advice. I see what you mean about hard to replace, but I've already been there: I'm a copier technician, so the mechanical proceedure is within my ability, but could you tell me more about the "you must program in the head id and run a purge" proceedure you mentioned?



    Many thanks,

    RB

  • buddybob Jan 20, 2008

    Sending this post again, not sure it went through:

    Thanks for your help. I've taken it apart again and think I've cleared most of the print head blockage, but now I get message:

    "unable to init. 4F". Can you tell me what that refers to? Here's my email...



    Thanks,

    rbla@bellsouth.net

  • Anonymous Mar 18, 2014

    I already cleaned the black print head 5 times. Quality improved, but not well yet. I have ink in the black cartridge. May be ink is dried. Is it possible?
    Yevgeniy

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2 Answers

Hey, that's terrific! Ah, well, thanks for your advice. I guess I'll be buying a new printer very soon. Shopping around, it looks like most brands use the same disposable printer setup. Can you suggest any inkjet MFPs that have replaceable print heads in case I make the same foolish mistake again?

Thanks Again
RB

Posted on Jan 26, 2008

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  • Brother Master
  • 1,113 Answers

I'm afraid there is no real sucessful way of cleaning these print heads, tiny micro filters built into the head unit will blocked. I have never unblocked one fully.

Fix is to replace head

These heads are not easy to fit, then once they are you must program in the head id and run a purge with four gen inks, this purge uses like 1/4 of each ink.

Recommennd you replace printer it is cheaper to


LINK to UNRECOMENDED removal of head

I dont have the 420 cn listed but here is link to mfc425cn head info so you can see how much they are not worth buying


below is pic of head

I admit it, I used cheapo refill ink!  Now the bla - 2d7dc76.jpg .

Posted on Jan 13, 2008

  • 2 more comments 
  • Soulvisitor
    Soulvisitor Jan 13, 2008

    more info on wasting time fixing a brother printhead

  • Soulvisitor
    Soulvisitor Jan 13, 2008

    It too much info to repeat, post email address I might send you a present.



    Menu * 2 8 6 4 rapidly gets into maintence mode then 76 is purge, then 4 for inital and choose all or something like that



    Head info is put into eprom so electronics knows what to do with head I use specialised software but can be done via control panel but once again why waste time with it

  • Soulvisitor
    Soulvisitor Jan 21, 2008

    Great work but now you have killed the head, here is info from service manual

  • Soulvisitor
    Soulvisitor Jan 21, 2008

    missing bit is replace head, main board or head supply pcb

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