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A Review of the Samsung JS850D FXZA 4K SUHD JS850D Series Smart TV – UN65JU750D, UN78JU750D

by on August 14, 2015

Definitely One of Samsung’s top 2015 SUHD TVs, the UN65JS850D is mainly distinguished from its nearest cousin THE JS8500 by the former model’s single screen size and the lack of several specialized smart TV features. The JS850D comes in only a single 64.5 inch size instead of the three different sizes available for the JS8500.

In terms of virtually all other features and its elegant flat screen appearance, the JS850D is almost as good as all the other Samsung top-shelf 2015 SUHD TVs that sit below the Ultra-premium JS9500 and the super-premium JS9100 and JS9000 models. With a wide host of advanced display technologies like Peak illuminator Pro, Ultra Clear Pro and nano crystal color, the JS850D meets the quality standards of some of the best 4K TVs on the market today and is definitely one of the 4 or 5 best Samsung TVs on sale in 2015.

Furthermore, in terms of connectivity and overall physical design, this particular 4K TV has plenty to offer for any home entertainment system in the home. Best of all, it manages to deliver the above at a more economical price tag than some of its super-premium SUHD cousins.

The Good

There are plenty of specs to marvel over in the JS850D. This is a SUHD TV and one of the better, higher-end SUHD models for 2015 to boot. Thus, despite some minor deficiencies in comparison to truly high-end 4K TVs, the JS850D delivers an overall roster of specs and quality rating that puts it in one of the top tiers of 2015 4K TVs.

For starters, there is the overall high quality of Samsung SUHD technology at work here. With the JS850D you get your hands on a TV that has been built well and built with future-proof connectivity firmly in mind. In this regard, not only the built-in connection ports are superb but the TV also offers the One Connect box with its external and replaceable series of connectivity ports.

This is part of Samsung’s drive to make so-called “Smart Evolution Ready” 4K TVs and it is a genuinely useful feature for users who want to buy an ultra HD TV that they can know will stay up to date even in a few years. So far, Samsung has been one of the best 4K TV manufacturers in this regard, doing more than average to ensure that even buyers of its early 2014 4K TVs can still access the latest content services and more standardized, new connectivity features.

Going beyond connectivity, the real “Good” in the JS850D and the SUHD line in general lies in the visual specs this TV offers. While the JS850D lacks some of the most advanced SUHD goodies like Peak Illuminator Ultimate (available only in the JS9500) for true HDR compatibility and its complementary technology of Precision Black Pro, it still offers Peak Illuminator Pro and Precision Black as dynamic range (contrast) enhancement technologies. Furthermore, other features like UHD dimming and Wide Color Enhancer Plus are also present in this model’s screen for some excellent display brightness, decent contrast and high color vibrancy.

Finally, there is the TV’s nanocrystal color technology. This refers to the newly developed quantum dot color augmentation technology found in only Sony, Samsung and LG TVs and the difference in color quality that it creates is truly worth taking a look at. Nano crystals are the main selling point of all the SUHD TVs and the JS850D is an excellent example of what this feature can do to create an impressive picture quality.

Check the Price of Samsung UN65JS8500 65-Inch 4K Ultra HD Smart LED TV (2015 Model) on Amazon:

4.1 - 81 Reviews

The bad

The JS850D does also have its minor deficiencies, though none of them are by any means deal breakers. This is after all a 2015 SUHD TV and as such it’s among the best on the entire 4K TV market today.

However, a few less than ideal aspects to the JS850D are worth mentioning. First of all and worst of all, the TV doesn’t include some of the more advanced smart TV features of other SUHD models like the next-in-line JS8500. These specifically seem to consist of the S-Recommendation Engine and full web browser. This is an odd and unfortunate absence in an otherwise great Smart TV platform with Samsung’s Smart Hub software

Next, there’s the contrast level. Specifically, the JS850D doesn’t do as well as it could in terms of dark tones. There are less expensive TVs on the market which offer better contrast and richer dark tones. This is unfortunate for a higher end SUHD TV.

Finally, we should also mention the edge-lit LED backlighting. Yes, it’s pretty good for an edge-lit array but this is thanks specifically to the exceptionally high brightness of Samsung’s own LED technology. However, Full-Array LED backlighting would not only obviously have been better, it’s totally overdue for TVs in the $1500+ range by this point. If Companies like Vizio can manage highly price efficient full-Array backlighting on their budget TVs, Samsung and others of its caliber should start offering this as a more common feature.

Final Thoughts

We highly recommend the Samsung UN65JS850D based on the quality of its technical specifications, connectivity, future-proofing and quantum dot color enhancement technology. However, we do so with some reservation due to the TVs slightly exaggerated price tag and a couple minor display weaknesses for this price like less than great contrast and a lack of full-array LED backlighting .


Screen size: 65 inches - UN65JU750D, 78 inches UN78JU750D
Smart TV: Yes
HEVC (H.265) Included: Yes
HD to UHD upscaling: Yes, Samsung UHD upscaling
HDCP 2.2 Compliance: Yes
Refresh Rate: 240 CMR (Effective)
Screen Lighting: edge-lit LED backlighting
Resolution: 3,840 x 2,160 pixels UHD
Wireless Connectivity: Yes, includes WiFi, Blue Tooth, NFC and Ethernet port
Remotes: Samsung Smart Remote Control
Connectivity: 4 HDMI 2.0 ports, 1 MHL port 3 USB 2.0, component, Digital Audio out, Composite, Ethernet
Dynamic Contrast Ratio: Over 1 million
Audio: 40W (10W x 2/ Woofer 10W x 2) front firing 2 channel speakers with DTS Premium Sound 5.1
weight with/without stand: 60.8 lbs/69.7 lbs
Dimensions: with stand: 57.7" x 35.1" x 11.1" inches, TV without stand: 57.7" x 32.9" x 1.2" inches
Processor: Quad-Core processor


The UN65JS850D offers a number of highlights that make it into a 4K TV that’s worth some serious consideration. Very similar to its cousin the JS8500, the 850D is definitely one of Samsung’s better 2015 TVs, even if it’s not one of the absolute best from the company.

For starters, there is the single most interesting aspect of the JS850D and a feature it shares with the rest of the SUHD TVs. This is the nanocrystal color that Samsung has put so much effort into developing, installing and promoting in its newest and best 4K TVs. Nanocrystal color is basically quantum dot technology and involves the use of films of different-sized microcrystals made from molecules of semiconducting materials. As the light from the TVs LEDs hits these films, it creates additional tones of color which combine with the TV’s pixel colors to create a far larger range of colors overall. The result is a vibrancy and accuracy of color which are both much more varied than those of normal 4K LCD LED TVs.

Moving along, there is also the somewhat limited but still very decent pseudo-HDR capacity of the JS850D. While the only truly HDR-capable model in the SUHD line is the JS9500, the JS8500 and a number of its cousins all come with two technologies: Peak Illuminator Pro and Precision Black.

These combine together with a couple of other features in the TV to create a better than average overall level of dynamic range (contrast). In the JS850D, the effect is surprisingly dull when it comes to black tones but from observation we can definitely say that contrast is better than that of a majority of 4K TVs we’ve seen. However, if you really want absolutely killer contrast without having to pay for the enormously expensive LG OLD 4K TVs, then the JS850D doesn’t come even close to the JS9500 in this department.

Finally, we come down to Samsung’s new Tizen operating system for its SUHD TVs. The JS850D comes with this new smart platform and the overall improvement in navigability, speed and ease of use is a major one. Tizen, along with the internal Smart Hub Smart TV platform on the JS850D work together well to deliver some excellent smart TV interactivity.

Furthermore, the Smart Remote Control is excellent for navigating through the use of motion control. Whipping the remote across the screen, just as you would with a Nintendo Wii control, lets you easily manipulate settings, find content and bring up menus. You can also use the remote’s buttons in a traditional way but in this Samsung dropped the ball a bit by stripping out too many control buttons in the Smart Remote for their 2015 TVs, including the JS850D.

We should also mention that the extremely elegant physical design of the JS850D is superbly lovely. Only LG’s 4K TVs beat Samsung in the looks department and while most new 4K TV models come with ultra-thin bezels and as much minimalism as they can, Samsung still manages to take the elegance to a typically new level.

Visual Specs

The nanocrystal-enhanced LCD display of the JS850D, along with the partial HDR capabilities of the TV probably add several hundred dollars to this models cost but they’re definitely worth the extra budgeting. Samsung currently has what are probably the second or third best TVs on the market in terms of overall display quality and the JS850D is a solid example of this, even if it does have a couple of minor defects.

The quantum dot nanocrystals definitely improve overall color accuracy and vibrancy, and you can see the effect right at a glance. Sony’s XBR65X850C also do a superb job in this field with their own version of quantum dots but we’d have to say that Samsung at least gives Sony a run for its money and some users might find the Samsung version of QD nanocrystals to be superior –it’s a bit subjective.

The limited but still powerful HDR capacity of the JS850D works thanks to Peak Illuminator Pro technology and Precision Black. The two combine together in a way that certainly delivers better overall contrast than what you’ll see in any average TV from brands like Panasonic, Sharp or even LG (Its OLED 4K models being a major exception to this observation). However, as we’d said, the dark levels are surprisingly washed out in the JS850D. They’re not terrible by any means and still outperform those of many average 4K TVs but the dark side of the TV’s contrast isn’t as superb as we expected.

We should also mention that the edge-lit LED array of the JS850D helps augment the contrast even further by using actual local dimming instead of a software-created simulation of it. The number of dimming zones is however something that the company keeps secret. The superb brightness of the LEDs themselves also helps out a lot here. Samsung makes their LEDs really, really well and the luminance they produce in the edge-lit models almost compensates for a lack of full-array LED backlighting.

Finally, the panel of the JS850D maintains a native refresh rate of 120Hz, which is great. And the company further augmented these 120Hz by using scanning backlight and black frame insertion technology to create a simulated 240Hz “Motion Rate” refresh rate.


As far as connectivity goes in the JS850D, you get the standard and crucial ports that come with any other 2015 Samsung TV along with some extras that are found only in newer issue Samsung 4K TVs. So as for this first aspect of connectivity goes. You get a TV with four HDMI 2.0 ports, 3 USB ports, Ethernet connectivity and of course, WiFi. The multiple HDMI 2.0 ports are very useful for inputting 4K video at a smooth 60 Hz from external 4K or HD media players and now, thanks to Nvidia’s 4K GPU’s coming with HDMI 2.0 connectivity, you can also use these ports to do some serious 4K PC gaming on the JS850D.

Even more interesting (and future-proof) though is the JS850D’s One Connect box option. This external connectivity box comes with several input ports of its own and can be replaced if new connection technology arrives on the market without having to replace the whole TV itself. This is an excellent feature that’s rather unique to Samsung 4K TVs.

Finally, all HDMI 2.0 ports are HDCP 2.2 content copy protection compliant and the TV itself comes with both HEVC and VP9 4K video compression decoding technology built into it for decompressing the latest 4K content which has been compressed in either of these two formats.


The Samsung JS850D is currently selling at Sam's club and Costco. Alternatively, check out the Non "D" version (same item - JU7500 here). You can also check out a comparable 4k TV that is slightly cheaper, the JU7100.

Check the Price of Samsung UN65JS8500 65-Inch 4K Ultra HD Smart LED TV (2015 Model) on Amazon:

4.1 - 81 Reviews

Not so Great

To summarize briefly, the JS850D is a fantastic TV but it could use some slightly better contrast by improving its dark levels. Furthermore, the price of this TV isn’t fully justified and Samsung could have at least included full-array LED backlighting for the nearly $2,900 you’re going to pay for the JS850D.


• Superb overall picture quality
• Nanocrystal technology for extraordinary color
• Great video processing
• Future-proof
• Excellent connectivity
• Beautiful design


• Too expensive
• Contrast could be better
• Deserves full-array LED backlighting

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Bottom Line

Samsung’s JS850D is one fantastic TV and shares a lot in common with its cousin the JS8500. However, in terms of overall value for its price, it’s not the best deal on the market by any means.

Check the Price of Samsung UN65JS8500 65-Inch 4K Ultra HD Smart LED TV (2015 Model) on Amazon:

4.1 - 81 Reviews

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  • jasmineanne.curtis
    August 16, 2015 at 6:15 am

    Great article. For those who live outside US like me, you can access Netflix, Hulu and similar media stations on your Samsung Smart TV by using UnoTelly or similar tools.


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