I have a Samsung LN40C630, manufactured in Mexico, with firmware version 2010/07/28_1001003 with an SQ06 panel. I am very pleased with the quality and detail of both HD and standard pictures on this set. It seems that HD picture quality varies between broadcast channels as they are received by my TV antenna. Jay Leno's face and suit on NBC's 1080i broadcast seem to be somewhat lacking in detail, while David Letterman's face and suit on CBS' 1080i broadcast are very detailed. On ABC's 720p Wheel of Fortune, Vanna White's gown is very detailed. 1080p Blu-ray looks great and 480i DVD looks about as good as it can. The detail level of HD broadcasts varies from program to program.
The main problem that I have had with my LN40C630 is that none of the posted settings from this forum have been able to completely tame my TV's tendency to overplay all red colors. After fixing the flesh tones, red colors seemed to be either too orange or too burgundy. The flesh tones were always too red. Blues were also inaccurate, but not as obvious as the reds.
All of my color calibrations were done by playing my Sharp LC-C3242U next to the Samsung with identical broadcast programming. The Sharp TV has very accurate color and one of the most pleasing pictures that I have ever seen on an LCD TV. After going back and forth, over various channels, I was able to come up with a calibration formula for the Samsung TV that looks great to me. The Sharp and Samsung TVs now have nearly identical pictures. The Samsung's white balance is exactly where I want it. I can play a black and white movie without having the screen appear too green, too red or too blue. It looks just right.
Black levels on the Samsung are the best that I have seen on an LCD TV. Apparently, the SQ panel is the source of the good black levels. Also, changing the Dynamic Range Compression of my Panasonic Blu-ray BD-60 from its default setting of Auto to Off has solved my audio sync problem.
For those who have experienced problems getting their Samsung LNxxC630 TV to display accurate red and blue colors, the following settings might help.
SAMSUNG LN40C630 Movie Mode Settings for component/Standard mode for TV.
HDMI Disc players output 1080i, Roku HDMI player outputs 720p and these devices play in Screen Fit mode. 1080i broadcasts play in Screen Fit mode and 720p programming plays in 16x9 mode.
Tint: Green 50/Red 50
Color Tone: WARM 1
Size: Screen Fit
Digital Noise Filter: Off
MPEG Noise Filter: Off
HDMI Black Level: Low (when not greyed out)
Film Mode: Auto 1 (when not grayed out)
Auto Motion Plus: Custom
Blur Reduction: 8
Judder Reduction: 0
Auto Protection Time: 2 hours
Black Tone: Off
Dynamic Contrast: Off
Shadow Detail: 0
Expert Pattern: Off
RGB Only Mode: Off
Flesh Tone: 0
Edge Enhancement: Off
xvYCC: Off (grayed out)
Color Space: Custom
Red: Red 52, Green 12, Blue 0
Green: Red 18, Green 51, Blue 0
Blue: Red 7, Green 5, Blue 67
Yellow: Red 58, Green 50, Blue 0
Cyan: Red 0, Green 42, Blue 53
Magenta: Red 48, Green 0, Blue 35
10p White Balance: On
Interval 1: Red 0, Green +1, Blue 0
Interval 2: Red 0, Green 0, Blue -2
Interval 3: Red 0, Green 0, Blue 0
Interval 4: Red +1, Green +1, Blue -1
Interval 5: Red +1, Green 0, Blue -1
Interval 6: Red +1, Green +1, Blue -1
Interval 7: Red 0, Green 0, Blue 0
Interval 8: Red 0, Green 0, Blue 0
Interval 9: Red 0, Green 0, Blue 0
Interval 10: Red 0, Green 0, Blue 0