Originally Posted by Geoff D
Any chance of getting the skinny on the service menu trickery? I know how to get in to the menu and have poked around here and there but I've never found any built-in test cards. If you don't want to post it here (in case peoples **** up their TVs) then I understand, but a PM would be appreciated.
There are actually several sets of test patterns built into the set if you explore the service menu. Some are effected by Sony's color settings. There is a set of patterns you can reach by using the options key on the remote, that directly invoke test patterns built into the raw AUO LCD panel itself. They match exactly the patterns that can be brought up by I2C commands to the AUO TCON board. (I found the full AUO data sheet for the raw LCD panel used in the 65X900A).
Using this set of menus, you can actually measure the full native gamut and the native white point of the panel. It is a set of WRGBCMY color bars, but are generated directly by the raw LCD itself. There are other patterns, including greyscale ramps in various directions and some patterns use to setup VCON and some other internal setups. Measuring the color bars in this pattern reveals the entire native gamut of the display.
I used this test pattern set to find a reference white point, which measured quite close to D65. I set that as a custom white point in HCFR and used the white balance user settings to align to that white point. It looks quite right.
The I1D3 says it is wrong, but it appears to be unable to accurately measure the quantum dot spectrum. Without a spectral correction file specific to this technology, a colorimeter is unlikely to give proper results.
Curiously, the Sony W900A, a 1080P which also uses quantum dot backlight, has a different Lcd vendor and exhibits a different white point and gamut.