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

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Brother 420 OK I followed the instructions about cleaning print head, put the printer back together trying to do initial setup with cleaning but I get error 51 and now unable to clean routine maintenance.  What can I do?

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  • 3 more comments 
  • jazzen Dec 04, 2007

    what/where is the Purge cam switch and how do I check it?

    watch/where is the ink cartridge/purge switch harness located (is it where the ink is connected?)

    what about the Switching arm assembly?

  • jazzen Dec 04, 2007

    when I opened the cover and closed it again the printer makes a sound like (gears??) and now it says unable to Init.

    If its the gears where is the maintenance unit located.

    Pictures would help. Are there pictures on line that I can view regarding any of theses items.

    HELP!!!

  • jazzen Dec 04, 2007

    OK thank you for the pictures. I have taken the printer apart once again. I carefully looked to see if there was anything not in place or damaged. Everything is back in place. I did a deep cleaning it came up with just "maintenance." I did 99 to reset. STILL theres trouble with routine maintenance and unable to clean. and back to error code 51.

    If there is nothing else left. question do I need to take it in to a repair shop? and is it worth it?

  • jazzen Dec 04, 2007

    I do understand but I never did anything with the gears. I only cleaned the print head. As instructed.http://www.fixyourownprinter.com/forums/...
    probably wasn't a good idea.

    it all started because my black would not print.

  • jazzen Dec 04, 2007

    Thanks.

    I might give it one last try. Putting it down for the night.

    If I make any head way I will post a reply with complete steps. Other wise I'm off to office supply store for another printer.

    you have been great in supply the information.

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  • Brother Master
  • 1,113 Answers

Error 51 = The purge cam switch does not come ON or OFF even after the purge cam has been driven by the specified number of pulses.
Fix is
Switching arm assembly not engaged correctly If the switching arm does not move smoothly, clean it.

Ink cartridge/purge switch harness not connected correctly
Correct the connection.

Purge cam switch broken Replace the purge cam switch.

Gear(s) on the maintenance unit broken Replace the maintenance unit.

Paper feed motor broken Replace the paper feed motor.

Main PCB defective. Replace the main PCB.

Cleaning of these print heads rarely if ever is successfull, they are electronic devices unlike other brands of printers

Posted on Dec 04, 2007

  • 4 more comments 
  • Soulvisitor
    Soulvisitor Dec 04, 2007

    here

  • Soulvisitor
    Soulvisitor Dec 04, 2007

    here is

  • Soulvisitor
    Soulvisitor Dec 04, 2007

    Very easy to get those two gears round the wrong way, idle gear and purge gear, ribs must face wrong way, I repair thes and if you brought it in to me after taking it apart I'd charge you heaps as it is if it was done in workshop i would change engine unit which on it own is worth more than machine, so is my labour 95.70 an hour, so in short not worth fixing. unless you wish to keep on with a possible never ending challenge

  • Soulvisitor
    Soulvisitor Dec 04, 2007

    How far have you had it apart, maybe killed main pcb, maybe bent switch on purge cam, check encoder strip for ink stains, make sure tab on print head cover rides under rail, so many possibilitys..... we rarely bother fighting with them too time consuming as you are finding out, we right them off or replace assemblys. Modern world is a disposable one labour is too expensive to waste. these are a brat of a machine to fix as are all ink jets

  • Soulvisitor
    Soulvisitor Dec 04, 2007

    gears will not be around wrong way if you havent seperated purge unit from engine unit,

  • Soulvisitor
    Soulvisitor Dec 05, 2007

    please rate my solution for me is all I ask for time spent for you

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