Hello, fellow Samsung TV owners!
As the owner of several Samsung models—77S95D, 77S95C, 55S90D, and an older QE55Q6FNA TV—I’ve noticed a common issue across these TVs: the calibration functionality isn't working fully as expected. Let me elaborate.
Excluding the older QE55Q6FNA, which has problems even with the 2-point white balance (it's not linear, and gain controls affect the RGB graph from 50 IRE down to 0), I want to focus on the newer models. While the newer TVs perform significantly better, there are still some persistent issues with the 20-point white balance calibration in HDR mode.
The main problem occurs when enabling HGIG in Game Mode, specifically with Game HDR Basic. The 20-point white balance adjustments seem to have no effect at all—no matter what values I change or how significant the adjustments are, nothing changes in the output. On the other hand, with Game HDR turned off (without HGIG), the 20-point white balance works, but in a strange and inconsistent manner. For example:
Adjusting RGB values at 5% seems to affect the RGB graph at 15%, 20%, and 25%.
Changing RGB at 10% does nothing at all.
Changing RGB at 15% affects the graph at 30%.
RGB values for 20% and 25% also appear to have no effect.
Moving to higher levels, adjusting at 70% and 75% affects the 65% point in different ways, and adjustments at 85% and 90% impact the 75% point—again, inconsistently.
With such behavior, it’s unfortunately impossible to achieve a proper calibration, leaving these high-end TVs somewhat unbalanced in terms of color accuracy. For reference, I am using a colorimeter, a pattern generator, and calibration software on PC, such as Calman and HCFR. It's a real shame for high-end models to face this kind of issue.
I don't believe this is a hardware problem. It seems like something that could potentially be resolved through a firmware update, at least for the 2024 models. My question to the community is: has anyone else experienced similar problems? And how can we effectively communicate this to Samsung in hopes that they address it? I'm not convinced that contacting first-tier support via chat would be effective, as they may not fully understand the technical details of the issue.
Any help or suggestions are greatly appreciated!
