I have two XH-A1s that we use in house. They're supposed to be the exact same model (one was bought several months after the other, early last year), and they seem to have entirely the same specs except for one item.
We synced up the cameras and started shooting, assuming I had the same white balance setting, using the "K" preset on both cameras. Capturing the footage later yielded a warmer tone from one camera. After going over the menus with a fine-tooth comb, I noticed that the main HUD was reading a white balance setting of 3200 on one camera and 3700 on the other! There doesn't seem to be a way to change this.
This worries me since they bought the same model camera to avoid things like this. Beyond manually white balancing at the start of every shoot, is there any way to change this? Is there a firmware upgrade somewhere?
Maybe I'm not following you, but the "Kelvin" preset is for dialing in a kelvin temperature by pressing the white balance button, then the indicator on the LCD flashes... at this point you use the scroll wheel to dial in whatever temp you want. The camera isn't "reading" anything. It's basically taking what you give it. From your description it sounds like one camera was set for 3200 and the other 3700, therefore the difference.