Question about Canon FAXPHONE B640 Plain Paper Bubblejet

2 Answers

No ink After not printing from this machine for over a month, it would not print - even after running cleaning cycle several times, and trying to print transmission reports several times. I bought a new (real Canon) cartridge and installed it, and still could get no print at all. It runs the ink mixing/head cleaning cycle, but the test page is blank. I bought another new cartridge and tried again. I still get no print. The machine scans and sends faxes out just fine, but does not print. I tried making a copy of a printed page (since I know the scanner works), but the page came out blank. What do I do? If the ink supply is dried out somewhere near the head, preventing the ink from feeding, what can I do to clear this out? I do have access to a wide variety of solvents, so I can follow through on testing if someone can point me in the right direction. Thanks

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  • BigNeil Jan 06, 2008

    Excellent solution. It worked like a charm, and I ran just one cleaning cycle after using the soap solution and the cartridge's airhole. Count me as a believer.
    Thank you very much.

  • Anonymous Oct 24, 2008

    we have a canon 640 faxphone we replaced the ink cartridge but still the machine will not print when we receive faxes back can you recomend a solution that we can try

  • rebbeca Oct 24, 2008

    we have a canon 640 faxphone we have replaced the cartridge but the machine will not print when we receive messages back but it lets is send out can you recomend something we can try

    thank you

    Mrs Simmons

  • Anonymous Mar 20, 2014

    counterfeit ink cartridges message and it prints one page ok and the rest are blank.



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Mater478.....did as you suggested, but the unit still told me to change the cartridge. I ordered a replacement a few minutes ago. I have another problem also. After cleaning the cartridge and reinstalling it the unit failed to reinitialize the cartridge assembly. This has happened since I tried to use the unit earlier this morning. I haven't used the B640 for about six months. Any suggestions? Thanks.

Posted on Nov 15, 2008


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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.

Posted on Jan 05, 2008


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