Question about Canon FAX-B840 Plain Paper Bubblejet

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Canon fax-B840 - Print is "stripey"

Despite changing the ink cartridge & doing many cleans the print is still unreadable with the bottom half of all characters missing and pictures being "striped" - print a line, miss a line etc.

Is this the end of my Canon Fax B840?

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  • 318 Answers

No not yet,the problem is the cartridge,sometimes even new cartridges might have a dry printhead
Remove you cartridge,put the printhead side in about 5mm of hot water and keep it there for 5 minutes,take it out and do head cleanning again.

Posted on Mar 12, 2009

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Why when the fax machine prints is some of the ink lighter than the rest?


It sounds like the print head(s) is clogged and needs cleaning. Another potential problem is the wrong ink or a defective cartridge. They ARE different. If you refill the cartridges be sure the ink is compatible with the printer.
Often simply running the built in 'head cleaning' test will clear out the partial clog.


Jul 23, 2014 | Brother Office Equipment & Supplies

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The black ink keeps drying up and will not print out black print


INK PROBLEM
Inkjet printers need to be used frequently to prevent ink drying out and blocking the print head nozzles.
If the print head cleaning maintenance routine does not clear the blockages, then print head needs replacing, but it may be expensive.
It may be more cost effective to buy a later model and better printer than replace the print head.

Jan 03, 2013 | Canon Cli526 Black Cyan Magenta Yellow 3x...

1 Answer

Cannon b840,ink cartridege seems half full ,but fax comes through ist page perfect 2nd fuzzy,blank on all following pages


Sounds like the cartridge is empty. Your cartridge has a waste toner hopper that collects excess toner from being deposited on the page. The half full feeling might just be the weight of the waste toner.

Dec 16, 2009 | Canon FAX-B840 Plain Paper Bubblejet

1 Answer

I Need to Print


Sadly in a word, 'No'.

Here is the exact answer from Brother:

Your Brother machine is designed to stop ALL printing operations
(printing from the pc, printing received faxes and printing copies or reports) when any of the ink cartridges are empty. This is to ensure the life of the print head and maintain premium print quality. If the unit were to continue printing, print jobs and cleaning cycles would suction air from the dry cartridge and damage the printhead. Even if you print in black only or change the print settings to MONO or GRAYSCALE to avoid printing in color, the programmed cleaning cycles would still suction the dry cartridge, because they are programmed to clean ALL the ink nozzles.

The only way to continue printing is to replace the empty ink cartridge or cartridges.

While memory is available, black and white faxes will continue to be received into memory. If a color fax is being received, the Brother machines HANDSHAKE will request the fax be sent as black and white fax.

All faxes received into memory will automatically print once the ink cartridge is replaced.

NOTE: Brother strongly recommends that customers do not use generic ink or refill their Brother ink cartridges. Using non-Brother supplies may affect the hardware performance, print quality and machine reliability since the ink formulation in genuine Brother ink cartridges prevent smearing and clogging of the print head. The Brother limited warranty does not apply to any problem that was caused by the use of unauthorized third party ink and/or cartridges.

Nov 26, 2008 | Brother Multi-Function Center MFC-240C...

1 Answer

Blue ink - printing problem


Hi,
Your Cyan cartridge is empty and need replacement. Maybe you can clean head of Cyan cartridge with alcohol but symptoms are the empty cartridge!
Good luck.

Sep 11, 2008 | Canon PIXMA MP830 All-In-One InkJet...

1 Answer

In Use/Memory FAX after changing ink cartridge


I had the same problem - it would not print the faxes as the machine would not recognize the generic cartridge - I had to get the official Canon cartridge to get the faxes to print out of memory.

Mar 18, 2008 | Canon PIXMA MP830 All-In-One InkJet...

2 Answers

No ink


hi i am a certified Canon repair tech for this fax. the problem that you are having is very common and has to do with two things. the cartridge and the purge/cleaning unit. what you can try is this open the printer and center the carridge unit and remove the cartridge. unplug the machine while it is still centered. on the right hand side you will see the purge unit. in the center of the purge unit is what looks like a retanglar pad. mix a water soap solution and apply to pad just soaking it. let it sit for a few minutes. take the ink cartridge and wipe the bottom of the cartridge with a damp soapy cloth. also if you look at the cartridge there is a little breating hole you can hold a cloth on the bottom and gently blow in that hole it will purge ink through the bottom of the cartridge. install the cartridge in the machine close the front door and replug in the power cord. you might still have to run a few cleaning cycles. hope this helps.

Jan 04, 2008 | Canon FAXPHONE B640 Plain Paper Bubblejet

1 Answer

Won't print in black


open your list of printers. r/click on the 780 and open properties. fo to the last tab "maintenance" and run cleaning 2 or 3 times then run deep cleaning 2 or 3 times. and see how this helps. If you've never done it before you might want to take out the print head and clean it with alcohol. Take out all the ink like you were changing them then reach in and gently pull out the container that holds the ink. This is the print head. Clean it and replace it, then run clean and deep clean again. run Nozzle check to see how clean it's become and you'll definetly see a difference in your printing. good luck

Sep 13, 2007 | Canon PIXMA MP780 All-In-One InkJet...

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