Question about Canon PIXMA MP780 All-In-One InkJet Printer

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Canon i470D Waste Ink Tank is Completely Full. How Do I Clean It?

I removed the print head and thoroughly cleaned it. My printer still won't operate at all. The power button continues to alternately flash between green and orange. The online manual says that means the waste ink tank is completely full. Where is the waste ink tank and how do I go about cleaning it? Should I buy a new print head? Is there hope or should I just buy a new printer? Thanks!

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  • suedotdot2 Jan 11, 2009

    Thanks, I'll give it a try.

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There is a cleaning solution sold on E-bay for Cannon i470D print heads.
Or you can try a little ammonia. I used a cap full of ammonia in each side of the print head where the ink tanks go.
Put the print head in a can and let it set in the ammonia for 5-15 minutes then blot dry with paper towels and let stand until dry.
Then run the maint routines for the print head found under properties/maintance.

Posted on Jan 10, 2009

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bullet.gif Two flashes: Out of paper or paper feed error
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bullet.gif Three flashes: Paper jam
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i_note_us.gif Note
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this answer is directly from canon

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5 Answers

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Normal 0 false false false MicrosoftInternetExplorer4 st1:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} Waste PAD ink Reseterfor Canon Pixma iP6320D


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1) Closethe print head cover.
2) While pressing the Stop/Reset button, press the Power button. (Do not release the buttons. TheLED lights in green to indicate that a function is selectable.)
4) While holding the Power button, release the Stop/Reset button. (Do notrelease the Power button.)
5) While holding the Power button, press the Stop/Reset button 2 times,(Canon idle will appear)and then release the Power and Stop/Reset buttons.(Each time the Stop/Reset button is pressed, the LED lights alternately ineither orange or green, starting with 0.
6) When the LED stops blinking and lights in green, press the Stop/Resetbutton 4 times. (Each time the Stop/Reset button is pressed, the LEDlights alternately in either orange or green, starting with orange.)
7) Press the Power button 2 times. ( the '' Canon" appear twice).The LED lights in green, and the selectedfunction is performed. (When the operation completes, the printer returns tothe menu selection mode automatically.)
8) Power off then back on and test.
9) Congrats!!


Prepared By Jeffrey Vicada (EDS- Technical Engineer) Philippines

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Replace the paper correctly and press the RESUME/CANCEL button.
If paper has jammed in the printer, clear the jam and press the RESUME/CANCEL
button.

Three flashes: Paper jam
If paper has jammed in the printer, clear the jam, replace the paper in the printer
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Four flashes: Empty ink tank
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Remove and reinstall the print head.
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The printer has a built-in waste ink tank for the ink used during print head cleaning. Eight
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button to cancel the error so you can continue printing. Before the waste ink tank
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the waste ink tank becomes completely full, printing will be no longer
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