What's your problem?canon i9100 error 306

Error 306 is a communication error and should have nothing to do with the cartridge. Check to make sure the printer is plugged in and restart your computer, and try again.

A communication error has occurred. reinstall drivers or change usb cable

Hi
You can try this I found.

Reset Procedures for Canon i9100 Printers

1. Turn off Canon i9100
2. Hold down Resume button and press Power button.
3. Keep holding down Power button and let Resume button go.
4. Press Resume button 2 times then let BOTH buttons go.
5. Green lights will flash and then stop blinking.
6. When green lights are solid, press the Resume button 4 times.
7. Press the Power button and the printer should turn off, if not, press the Power button once more.
8. Your Canon i9100 Printers should respond as normal.

Please all I ask is call back and just gave a vote, it will gave me some satisfaction to know am helping some one, so I will keep on helping.
All The Best: Pineworks

Reset Procedures for Canon i550, i560, i850, i860, i865, i9100, i9950 Printers

1. Turn off Canon i550, i560, i850, i860, i865, i9100, i9950 Printers
2. Hold down Resume button and press Power button.
3. Keep holding down Power button and let Resume button go.
4. Press Resume button 2 times then let BOTH buttons go.
5. Green lights will flash and then stop blinking.
6. When green lights are solid, press the Resume button 4 times.
7. Press the Power button and the printer should turn off, if not, press the Power button once more.
8. Your Canon i550, i560, i850, i860, i865, i9100, i9950 Printers should respond as normal.

Please all I ask is call back and just gave a vote, it will gave me some satisfaction to know am helping some one, so I will keep on helping.
All The Best: Pineworks

That error says you need a new printhead,
QY6-0039-000 around $40.00. resetting won't help. You shouldn't need a shop for this replacement.

http://printer1.blogspot.com/2009/01/canon-i9100-service-manual.html

Go to:
http://printer1.blogspot.com/2009/01/canon-i9100-service-manual.html

Download service manual rar. file.
This also contains the user manual.

this is the webpage where you can download a couple of manuals for your printer.
Quick Start for Canon i9100 is the manual you want to download registered free and download (try using a fake email address if you want.. and see if it lets you) http://www.retrevo.com/support/Canon-i9100-Printers-manual/id/259bh537/t/2/
it has maintenance instructions that should let you take care of your needs.

HI Guys 6A00 error usually cant't be fixed according to the service centre, I was lucky and actually bought an extended warranty, the service centre said that the MP530 are a good printer and worth fixing as they don't see many at all compared to other models and other brands. There was a broken piece of hardware that something to do with the print carriage. cheers vailey

Before you try to reset your Canon i9100 be sure to remove the ink head itself before attempting and then replace after, it won't work if you don't, I almost threw away 2 good printers before I read this today.