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This is the limited info canon gives about removing paper jams. https://support.usa.canon.com/kb/index?page=content&id=ART129606
With that being said, it may be worthwhile to buy the service manual for that printer. Note the service manual is not the user guide. The service manual will show you how to dissemble the machine and perform repairs that are usually done at canon service centers. You can get the ma nual here
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