Here are pics of the SM main and options.
Currently SM settings are:
Main>Dynamic Contrast: CE=ON, DIM=ON
DIM seems to dim backlight for dark scenes dynamically.
This darkened the backlight further, but it may have done so at the expense of black crush. When it gets dark I will investigate this. This control has settings of OFF, 42, 57 (default), and higher numbers.
Edit: I think this crushed the blacks too much. I will reset to 57 or higher.
I did not have the guts to touch the PWM Dimming, that might alter the extent to which the backlight is dimmed dynamically or by the E savings switch in the user menu, may just try it later.
Edit: this has INT and EXT settings, EXT just seemed to disable it.
Also note the 7.5 IRE options, this may be what we need to work on the black crush, thoughts?
In the user menus, custom: Contrast=100, bright =65, color=55, warm2, sharp=50.
The backlight seems to be as far down as I have ever seen it.
That pleases me.
Note: CableCARD must be pulled before entering the SM.
No corruption of CC after SM session.
CC insertion starts FAN
running. Yikes !!!
Looks like this set will be powered off when not in use by switching off UPS.
Edited Contrast, Brightness. Looking pretty good, I'll keep tweaking these.