Well, apparently myself, and a few others helped many owners in the 2010 xxLD550,xxLD520,xxLD650 I started back then. My information was and is not wrong, I understand all the relationships between maximum luminance level, contrast, brightness and establishing these parameters for the ambient light levels in a room.
What you consider wrong apparently is if ALL the information on it is not given at one time.
Going back to the OP. His back light at 70 is too high to get any decent black level on this line of TVs that already has mediocre black level inherent in the panel. As I pointed out, upper 30s to lower 40s usually is adequate and also keeps excess light from the CCFl back light form compromising best black level. Of course you would need to decide if any given starting back light level is enough for viewing conditions.
What I have seen is often people play with back light, brightness and contrast back and forth without realizing the relationships of them. The proper procedure is to set backlight to as low a level as possible since , as I said, LCD panels leaklight. . .. so the higher you have back light the worse black level will be. By increasing brightness I did not mean increase it to obtain maximum brigthness, but to set it using test black and BTB test patters to get the best shadow detail in actual program material. And then, of course , set contrast to the proper point in the 16 -235 range for maximum white level.
That is all.. . . you just seem to be out of sorts yet with your C6 issues and want to nit pick. Give it a rest. Besides. You said yesterday:
Originally Posted by PlasmaPZ80U
Sorry about that; I got carried away and forgot this is an owners thread and not the display calibration sub-forum. Anyway, I'm getting my set professionally calibrated so that I once and for all know it is set properly. And I will keep technical discussions out of this thread in the future.