Originally Posted by D-Nice
To make any additional changes (RGB xy plots, gamma changes, additional menu items, additional A/V modes, etc) requires engineering commands. At this point it time, no one in this thread has access to those codes. You can play with those settings all day long, but they will not stick outside of the SM (been there, done that last year and was told they required engineering commands).
Dnice, with all due respect, I'm not sure if what you say is accurate. The service manual indicates that the RGB xy plots are saved in the same active u-comm and in the same factory mode as are the RGB white balance settings which we know can be changed and saved. Moreover, some of these settings such as gamma appear as though they can be changed without even accessing the "factory mode" but by straight RS232 commands or through a service remote control. But if a setting does require being in factory mode, then that can be accessed via one of two RS232 commands, FAY or PFY. It is my belief that nearly everything in the service manual can be adjusted and be made to stick or there wouldn't be any need for putting it in, and in the rare instances where a variable cannot be permanently changed it is duly noted in the manual.
Now I realize you've been told one thing, and this may or may not be true, but I still have my doubts as I see no reference to any special codes or keys in this manual. My work experience with industrial controls and having to troubleshoot a lot of automated industrial equipment by pouring through their manuals and program code tells me that once you have access to the firmware or software residing on a PLC or controller you generally have the ability to make the necessary changes. Basically, once you're in you can begin. The things that cannot be changed are the things to which there is no access whatsoever which is usually prohibited by codes, keys, or passwords, hence, you will never see the things you are prohibited to change in the first place. Granted, there are some things that cannot be done here... you mention additional menus, A/V mode, even ISF capability, and I concur that this is likely not even a remote possibility as there is absolutely no reference at all to any of that in the service manual. But I do believe that what can be accessed can be changed and preserved. Obviously, there is certainly some risk to fiddling around with any setting, but what can easily be done can usually be easily undone, too.
I've given the 200 page service manual a pretty thorough read several times now and from what I can tell there is no mention at all of any special commands and no mention that nothing can't stick. On the contrary, there are literally hundreds of RS232 commands and value setting ranges mentioned that can be effected via a service remote or the service connection and software like CC. Granted, this manual isn't a well written document in that there is very little to help one understand the technical jargon of TV repair, but my guess is that the intended audience already has a pretty thorough knowledge of what is being covered via training, experience, etc.
I guess what I'm saying with the above soliloquy is this... that to say with certainty that something cannot be done based on just the experience of one, is in my opinion a bit premature and many times proven false. How does that saying go, two heads are better than one. Well, there appears to be scores of heads on this board and I think that collectively we might still be able to uncover further calibration adjustment capabilities of the G9 NE Pioneer's.