PPTV-55P teardown evaluation: facts speak louder than words and truth!

Hi, everyone. I'm Zoe. Someone asked Zoe how to read? The English pronunciation is ['zəʊɪ]. A few days ago some netizens called me "left one" and "Monday". Zoe can only say tears in tears, "as long as you are happy." Closer to home, what does Zoe do today, yes, dissect PPTV-55P! Why is it so cruel? Do you not want to be an angel to each other? Hey, I pretend not to understand: "sorry, i don't understand."


If you still want to find out about the PPTV-55P's opening, installation, and appearance, etc., please step → PPTV-55p out of the box Zoe with you talk about the face of the era; if the configuration of the PPTV-55P performance and practical experience Interest, then you can not miss → PPTV-55P smart TV evaluation: ideal and reality "step away."



The PPTV-55P front frame adopts a high temperature integrated dwelling molding process with an extremely narrow side design. At the bottom, a brushed metal process is used. PPTV-55P backplane uses industrial rubber, power interface is located in the lower left part of the backplane, peripheral interfaces are concentrated in the right side of the backplane, the left side of the backplane is the switch, right side "cross" rocker.



On television signs, we can clearly see the basic information of television and various symbols: digital cinema system, recycling valid for 10 years, China's mandatory product certification, prohibition of disposal as domestic waste, double insulation.

Consumers who usually buy TVs generally only pay attention to the appearance and function of the product, and cannot watch the internal structure of TV products. Is it worth buying a product for work? Also no research. The so-called ear hearing is false, and Zoe took everyone to see the inside of the PPTV-55P today!




Here we begin to disassemble, first we have to pull the power cord on the backplane.



Flatten the TV with the backplane facing up and remove the four screws on the TV stand.



Remove the screws on the back plate gently. PS: Hide one screw in the label at the interface.



A masterpiece of obsessive-compulsive disorder - a close-up of the screws removed.

Open the backboard, there is still a little excitement in my heart!



After the shell is opened, it can be seen that the interior of the PPTV-55P fuselage adopts a metal back plate, which has the function of shielding electromagnetic interference generated by various electronic components and a solid body.



The PPTV-55P's back assembly is tightly integrated with the steel plate. Its various modules are clear and tidy, and the lines are slightly bold.

Here we introduce the order from the power board → TV motherboard → LCD driver board → WiFi module → speaker → other.

Power Board:



As the power supply hub for the entire TV, the power supply motherboard plays a vital role. This module combines the two functions of switching power supply and high voltage board. The lower left corner is the power input. Through a series of complicated processes such as rectification and filtering, frequency conversion, and voltage regulation, the voltage and current required by the lower circuit are finally obtained and output from the right side.



PPTV-55P's power cord is plug-in type, and the power board has a yellow board design with dense components, but the arrangement is relatively neat, and the overall work is good.

Here we look at a few details.









Multiple heat sinks ensure stable operation of the circuit.

TV motherboard


As the smart core part of LCD TVs, TV motherboards are playing extremely important roles. Below the right heat sink, it is the heart of the smart part - the CPU. There are two USB ports, three HDMI ports, and cable television ports on the right side of the TV motherboard. The lower ports are network cable ports, optical fiber output ports, computer audio ports, VGA ports, AV ports, and component ports. The original motherboards are arranged neatly and orderly, and the clean and neat design makes people look very comfortable.



PPTV-55P uses Cortex-A17 architecture MT5508 processor, standard 2GB DDR3 memory + 8GB high eMMC 5.0 flash memory, while supporting Ethernet RJ45 100M broadband; 2.4G/5G dual receiving dual antenna 300MbpsWIFI, supports 4K video playback And H.265 decoding, is a mainstream 4K TV CPU.



Samsung's production of chips! Samsung produced, trustworthy!













LCD driver board:



The LCD driver board dominates the real world of the entire screen. The middle main drive IC is clearly marked with "LG Display". Ps: If the TV has a dot-like dead pixel, the screen is damaged. If it is a bar, it is a problem with the LCD driver board.



PPTV-55P uses the LG OEM driver PCB board that is compatible with the LCD screen. The model of the LCD driver master chip is TLi2380EP. According to the official introduction, 55p screen can use chip adaptive video coding algorithm to achieve 4K image point-to-point restore, improve the refresh rate, can well solve the traditional 4K TV motion picture jitter, tailing problem, estimated with this LCD driver There is a lot to control the chip.







Zoe found the LCD screen information tag on the back panel. The screen shows that the screen was created for TPV_AOC OEM. From the labeling point of view, the screen model is TPT550U2, production time is July 16, 2015. PPTV claims that the product is based on the LG original screen. From the aspect of process quality, it is worth trusting by users. Of course, in order to ensure that it is as good as new, Xiao Bian could not bear to completely dismantle the screen, we also agree with the official information.

Wifi module:



The WI-FI module that is set up independently, the above shield cover is welded on the circuit board, play a shielding role, have guaranteed the wireless stability. Although the chip is surrounded by a shield, we can't get information about the chip, but on the module board we can see that the solder joints are fine and the workmanship is fine.

speaker:



In the bottom of the backboard, there are two speakers,



The speaker model is Y310-610, 11W, 6Ω! Both sides have a sponge wrap, which adds a good protection. The interface is a snap-in design for easy removal.



The two speakers are fixed to the backplane by rubber pads to ensure the stability of the speakers. On both sides of the hollow processing is to make full use of the internal space of the TV as a sound cavity to enhance the sound layering.





other attachments:

Cross Rocker:






Power indicator and signal receiver:



Indicators and signal receivers on both sides, do not kanban small, but the solder joints and accessories are quite fine.

PPTV-55P detail drawing:















to sum up:

Through the above PPTV-55P teardown graphic evaluation, we can easily see that PPTV-55p overall work and layout is still more solid and delicate, and there is no phenomenon of stacking, the arrangement of the components is more orderly.

However, PPTV-55P also has some unsatisfactory areas, such as the internal wiring is slightly messy, there is a part of the line between the intersection and overlap, this will produce a part of the interference. Zoe thinks it would be great if it was in the form of a cable.

Of course, for PPTV-55P quality in the end, it is not suitable for the purchase of the issue, Zoe still feel that should vary from person to person. If you are still not sure about it, you may wish to refer to out of the box and evaluation, more or less will indicate for you the direction of purchase!

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