Hi, I'm Robert and I'll be helping you with your printer question.
where did you run into the Q3 ?
its most likely application is to mean the third quarter of a fiscal year
it is also a video trimming software package from zoom
again there are a ton of things that use G3
including guns and a band
and a camera
its a canon fax/phone jx500 when im sending a fax it comes up with G3
that is a fax transmission mode. it is not necesarrily an error just telling you what mode it is using to communicate with another fax machine. there are many modes some are faster than others and sometimes it has to drop down to communicate with an older machine