Hi rubberduckey,
The default password is the serial number of your iX6820 in all capital letters (view info here).
If the printer has the latest firmware, the default password was changed to a random string of characters.
To view the password if the firmware has been updated, please press and hold the down the middle button on your printer and then release that button when the POWER lamp flashes white 6 times (view in manual here).
The Network Configuration page will print. The password will be listed as "default password" line at the bottom of the page.
If neither of these are working, you can reset the network settings of your PIXMA iX6820 to their default values.
Please note, if you perform this, you will then have to reconnect your PIXMA iX6820 to your Wi-Fi. You may use the cableless setup method (view steps here) or if your router has WPS, you can use either the push button method (view steps here) or the PIN code method (view steps here).
To reset your PIXMA iX6820's network settings, please press and hold the down the middle button on your iX6820 and then release that button when the POWER lamp flashes white 9 times (view in manual here).
Once reset, reconnect your PIXMA iX6820 to your Wi-Fi.
After it is reconnected, print the network configuration pages again. If the password does not appear at the bottom, please use the serial number of your printer (in all capital letters) as the ADMIN password.
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