In a perfect world, you buy things, you work with those things and if they break, you can repair them.
In reality, hardware vendors in particular make it quite difficult to repair things.
I met one of those issues today. After playing with my network infrastructure at home, it needed to adjust the network settings of my SOHO Canon i-sensys MF8330cdn printer that has been serving my family good - so far.
For reasons unknown, I was not able to change any settings because I was always asked for a completely unknown username & password. I am 100% sure that I never entered such a password before and as it seems, Canon made it particulary difficult finding out how to factory reset the printer.
After a long search and after even purchasing the service manual in order to find a clue how to reset the device, I finally was able to resolve the riddle:
service mode = password reset
- enter the "Service Mode" by pressing "menu 2 8 menu"
- go to COPIER->FUNCTION->CLEAR->ALL
- power off the printer and power it on again
the "menu" button is the one with the asterisk in the head
After that procedure, you will have an almost vanilla printer, with many (but not all) counters reset to 0 and all passwords removed.
only English & Japanese in UIThat however, had a strange sideffect. Now I can only choose between English and Japanese as the UI language, so beware if English causes issues for you or the rest of your users :)
From what I have read, this also works for some newer models (in particular MF8380).