Official Samsung LNxxA750 Owners Thread - Page 418 - AVS Forum | Home Theater Discussions And Reviews
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post #12511 of 12524 Old 08-21-2015, 08:57 AM
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Has anyone had issues with the LNxxA750's power supply making noise? Either a hum, buzz or squeal?
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post #12512 of 12524 Old 08-21-2015, 07:21 PM
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Originally Posted by Absolutely Fabulous View Post
Has anyone had issues with the LNxxA750's power supply making noise? Either a hum, buzz or squeal?
No, and no other issues since purchase either.

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post #12513 of 12524 Old 11-01-2015, 09:45 AM
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Have not had that issue, Milenkod, but occasionally I've experienced another odd behavior. Every once in a while when the tv powers up the colors would be all messed up, where it casts a sort of purple haze over everything. I disconnected the HDMI cable going through my receiver and tried a direct connection between my cable box and the tv. That made it better (less frequent) but didn't eliminate the problem entirely. I still had to reach behind the tv and disconnect, then reconnect, the cable into the HDMI port to get a normal picture.

However the other day I tried a different HDMI port (No. 4) and that seems to have solved the issue, at least for now. Has anyone else experienced anything like this? I have the 40" model, and this is the only problem I've had since buying it new.

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post #12514 of 12524 Old 11-02-2015, 09:27 AM
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Originally Posted by JBaumgart View Post
Have not had that issue, Milenkod, but occasionally I've experienced another odd behavior.....
Great...I tried to delete the duplicate post and it deleted them both.

I think I may have found the issue to the power cycling problem. There was an early firmware update that resolved this issue and it appears that this TV may not have had that update. There's no way to flash the mainboard now and I'm stuck with wholesale replacement of the board. Less that $ 100 on eBay for a salvaged board. I may try this route before giving up.
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Last edited by Milenkod; 11-02-2015 at 10:15 AM.
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post #12515 of 12524 Old 11-08-2015, 09:40 PM
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Question Samsung ln52a750r1f Evolution Kit?

Hello, I have an old samsung ln52a750r1f and I was curious if there is anything like this Samsung SEK-2000 Evolution Kit that will upgrade our TV's to be more like a smart TV?
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post #12516 of 12524 Old 11-09-2015, 03:22 PM
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Any change that firmware updates still exist for this model?
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post #12517 of 12524 Old 05-26-2017, 08:36 PM
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Got a LN52A750R1FXZA for Free - Now to Set it Up...

My brother-in-law handed us down his Samsung LN52A750 for us to use in our bedroom. He had it serviced years ago under warranty with a power supply cap kit so it oughta' be dependable for a while. I went fishing for setup info here but got a bit lost. Only 400+ pages! I bought a Sony BDP-BX650 from Costco to use with this new old panel. Otherwise it has a Spectrum HD cable box connected to it.

Anyway, we've been using it for a while and cable TV looked fine but when I got around to trying BDs, I experienced what I think folks call soap opera effect, where many scenes looked over-processed, excessively three-dimensional, objects moving through the foreground too much in-focus, etc. It was making me crazy. I went nuts checking all the BD player's settings (since cable seemed OK), finally found the culprit in the [TV's not the BD's] Auto Motion Plus 120Hz setting. Seems OK if "off" or "low". Silly me, I was almost ready to make that BX650 my first ever return to Costco. Sheesh!

In our living room we have a much newer Samsung UN60H6300, also with a Spectrum cable box, and a Sony BDP-S5100. I didn't recall having to deal with such over-processing issues on that display. Come to think of it, the guest bedroom with its Sharp Aquos LC42D62U [from about the same time period as the LN52A750] and Spectrum box wasn't so annoying either. But no BD player in that room, only a trash-picked Sony DVD player.

Does anyone have a shortcut to some comprehensive setup hints for this old Samsung LNxx750? It would at least be a good starting point, even if the backlight wear makes the starting numbers fairly pointless.

I know this thread has been dormant for a while but any help or guidance would be greatly appreciated, thanks!

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post #12518 of 12524 Old Yesterday, 07:52 AM
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Quote:
Originally Posted by Rectaltronics View Post
My brother-in-law handed us down his Samsung LN52A750 for us to use in our bedroom. He had it serviced years ago under warranty with a power supply cap kit so it oughta' be dependable for a while. I went fishing for setup info here but got a bit lost. Only 400+ pages! I bought a Sony BDP-BX650 from Costco to use with this new old panel. Otherwise it has a Spectrum HD cable box connected to it.

Anyway, we've been using it for a while and cable TV looked fine but when I got around to trying BDs, I experienced what I think folks call soap opera effect, where many scenes looked over-processed, excessively three-dimensional, objects moving through the foreground too much in-focus, etc. It was making me crazy. I went nuts checking all the BD player's settings (since cable seemed OK), finally found the culprit in the Auto Motion Plus 120Hz setting. Seems OK if "off" or "low". I was almost ready to make that BX650 my first ever return to Costco. Sheesh!

In our living room we have a much newer Samsung UN60H6300, also with a Spectrum cable box, and a Sony BDP-S5100. I didn't recall having to deal with such over-processing issues on that display. Come to think of it, the guest bedroom with its Sharp Aquos (LC42D62U I think - going from memory not notes) and Spectrum box wasn't so annoying either. But no BD player in that room, only a trash-picked Sony DVD player.

Does anyone have a shortcut to some comprehensive setup hints for this old Samsung LNxx750? It would at least be a good starting point, even if the backlight wear makes the starting numbers fairly pointless.

I know this thread has been dormant for a while but any help or guidance would be greatly appreciated, thanks!
Originally Posted by zerog6 View Post

Alright, I think I'm finally done. I've tried for quite a while, but it's not going to get any better than what I've done now from my experience.

The grayscale was already as good as it can get, so that was pretty much unchanged. The same goes for the contrast ratio.

I was able to get better color accuracy in the end. Previously I had good dE values for the colors, but the x/y values were further off than what I wanted. I found that by raising the general color setting even more and then compensating by lowering the intensity of each color in the color space menu, I was able to get better accuracy in the x/y values. Which in turn gave me even better dE values. Green though is still a color that's simply under saturated, there's nothing you can do about it. None the less, it's still pretty close to being where it needs to be. And if you look at the file, you can see that every other color if pretty much perfect.

I'm very happy with everything now. So I think this was my last calibration for a while. Special thanks to ra004e for letting me borrow his eye-one sensor so I can do the calibrations and post the results, it's very much appreciated.

For those who want the white balance settings for the user menu. They really haven't changed much at all from my previous Warm-1 settings. So you'll be fine using the previous White Balance settings I posted combined with the rest of these settings I have now. I'll post them together below so you won't have to keep searching for them.

The ColorHFCR file is attached

Here they are:

FW:1007

Movie Mode: Warm-1

Contrast Ratio: 3,110:1

White Balance
If adjusting through User Menu
Offset
R: 28
G: 25
B: 21
Gain
R: 25
G: 25
B: 29

If adjusting through Service Menu - "WB Movie" Settings
R_Gain = 52
B_Gain = -89
R_Offset = 0
B_Offset = 8
Gamma = M2

(SM-WB Movie/User Menu) Picture Settings
Backlight = 3
Contrast = 100
Brightness = 43
Color = 50
Sharpness = 10
Tint = 50/50
Gamma = 0 , If you already adjusted Gamma through the Service Menu (Expert Settings)
Gamma = -1, If adjusting Gamma through User Menu only

Color Space
Red
R = 30
G = 0
B = 1
Green
R = 26
G = 46
B = 0
Blue
R = 9
G = 0
B = 41
Cyan
R = 30
G = 47
B = 56
Magenta
R = 38
G = 0
B = 58
Yellow
R = 60
G = 48
B = 0
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Samsung 46A750, Panasonic BD35, Dish 722
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post #12519 of 12524 Old Yesterday, 07:54 AM
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https://reviews.lcdtvbuyingguide.com...ibration.shtml

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post #12520 of 12524 Old Yesterday, 07:56 AM
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http://www.tweaktv.com/tweak-my-tv/c...ln-46a750.html

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post #12521 of 12524 Old Yesterday, 10:59 AM
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Trifecta, thanks!
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post #12522 of 12524 Old Yesterday, 04:16 PM
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Enjoy your new TV. Our A750 refuses to die, and I still get compliments on the picture.

Samsung 46A750, Panasonic BD35, Dish 722
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post #12523 of 12524 Old Yesterday, 11:31 PM
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Quote:
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Enjoy your new TV. Our A750 refuses to die, and I still get compliments on the picture.
Thanks! The backlight clearly ain't what it used to be but the bedroom is dimly lit anyway. And the price was right! ;-) My brother in law even delivered it personally and saved us a trip into the People's Republik of New Jersey!

The only issue now aside of my aforementioned PQ angst is that the unnecessarily wide bezel slowly works its way out of place so every week while dusting I push it back in/on.

Now to start working my way through that James Bond BD box set...
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post #12524 of 12524 Old Today, 09:41 AM
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Good to see this thread reawaken after it's year and a half nap.

I have the 40" in the bedroom, and a couple of months ago came very close to junking it. I was getting an annoying, lightning-fast picture flicker that was limited to a sizable portion of the screen, namely a clearly defined rectangular block in the lower left that occupied about a third of the picture overall. What was strange is that the flickering was sporadic, and there didn't seem to be any rhyme or reason when it would occur. This lasted maybe 2-3 months, but in the past month (or more?) it's totally disappeared, and picture is again stable.

I don't know how a TV could fix itself, so I've concluded that the flickering was somehow being caused by a connected Comcast X1 box. I've had to reset this box periodically due to Comcast issues, so possibly the last reboot somehow re-established a good connection? I have a total of 5 Comcast boxes in the house, and over the years the one located in this bedroom has had some issues. Whatever, no issues any more, so this being a bedroom set I have no good reason to replace it with a new and better model. Except for its bout of flickering (which probably wasn't being caused by the TV?) it's been problem free.

Further thoughts anyone?

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