Welcome to the club.

That is the only input 6 that I have record of. There are many frustrated sharp owners out there when it comes to input 6 & 7 on some models.... firmware omission I imagine. I can email you a relatively comprehensive list of codes (all codes for devices 1, 17 and 30 both used-documented and unused codes). If you have a pronto I have files for pushin' and testin'... just avoid the service menu or at least do a search for "Evil K" on this site for how to undo it.

You can alway construct a Macro by selecting input 5 and the toggle to 6.