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Without YouTube showing the method, I have no confident of the cleaning.

Appreciate the help! What I want is a YouTube video to show the whole process.

I heard purge unit cleaning but know nothing about the proper procedure other than to ruin the unit due to mishandling. If a good Youtuber to give example, I will definitely give a try on this. Always appreciate your help to those in printer trouble.

Thank you for your comment, "The Hat". If this is the case, I would ask how the 4 colors in the same group their cartridge have ink flow issue? This is hard to happen coincidentally.

Sorry, I mean from time to time the existing one can't be recovered (cleaned) any more.

I have the same story recently, but happened in group 1 (PC, M, Y, PM). I clean the printhead when this occurred, after that to get a temporary workable printing for just few days, then it happened again. From time to time, I replaced the printhead with a brand new from Canon. I hope this is not...

Wanna know if you have tried A-Sub and Koala Luster photo paper before? How is their quality? Heard somebody said the price and quality are both attractive.

Enjoy photo printing work

I see, thank you!

You are right. I am thinking to buy a resetter and ARC for that. Thanks for the helpful suggestion!

I see. Checking in Aliexpress for the chips. Thanks for the suggestion!

Learn a lot from you, Peter. Surely will not do that. As "The Hat" said, change the chipset to the origin I am living is the way to go.

Thank you!

Yes, fully understand now. Chips are hard to be migrated due to the very thin chips board in OEM cartridges. It's a high risk operation.

Appreciate the comment and suggestion. I found from web that if I can download this Canon Service Tool V5103 and run it, I can direct change my print to USA region. Is this correct?

I am using Canon IP7270 (Asia model) printer. Due to ink cartridge cost issue, I need this printer set to IP7220 ( America model) so that I can use PGI-250/CLI-251 instead of PGI-750/CLI-751 ink set. As I know, we can do this thru service mode to change it. Is any one can teach me thru it. Thank...

Does any body know that PGI-250/CLI-251 (for North America model IP7220) can also be used in IP7270 printer or not? Is firmware control the cartridge chipset recognition or something else? Can I just upgrade the firmware from Canon US into this IP7270 for using PGI-250/CLI-251 cartridges...

I enjoy photo printing a lot. Like photo taking, post-production in RAW, share my photo with friends thru printing. Like to watch Youtuber, Jose Rodriguez and learned a lot about properly using printer and maintenance from him. Wanna learn from all of you, and share some experience, too!