It has a large battery longitude, stereo donkey, 5G small King Kong Redmi Note 9 5g, priced for thousands. In the 5G mobile phone market, the price can be said to be a bottombox. Decomposition of the medium and low-end thousand yuan equipment will be relatively simple. Note 9 is no exception. The little friends will be curious to have a cut-off reduction and how to control the cost.
(The purchase device is 6GB + 128GB version, which is the main destruction of the data below.)
The main reason we purchased REDMI Note 9 5G is that it is equipped with Tianzhu 800u, Ewistech analyzes the matching chip after disassembly, and populates the data into the Ewistech search. Therefore, all of our machine IC has been analyzed, and some special content has also been found in the process.
(▼ redmi Note 9 5g motherboard front and back IC label)
First come back to briefly introduce: Tianzhu 800U is a 5G mobile phone processor released in June 20 years, based on 7nm process technology, using 2 + 6-eight-Nuclear CPU architecture, including Armcortex-ARMCortex- A76 nuclei and 6 Cortex-A55 small cores, GPUs are the latest generation ARM MALI-G57 GPU.
Products will naturally be compared. It is not difficult to find that Tianzhu 800u is like the low-and-use version of Tianzhu 800 and the upgraded version of Tianzhu 720. When dismantling, the Tianzhu 800u processor chip is the same as the Tianzhu 720 package, (package information is different from the number of sequence numbers), and the package model is the same MT6853V, DIE is the same.
After contrast the RealMe V5 of Tianzhu 720 and the entire machine BO of REDMI Note 9 5g equipped with Tianzhu 800u, it is learned that the two platform supporting chips are basically the same. Some of the radio transceiver models is only.
The complete IC BOM of the whole machine can go to the EWiStech query to learn about the cost of the REDMI Note 9 5G. Below we will return to disassemble and see if there is a scavenger and reduction.
Dismantle
Remove the calorker before dismantling. The front side of the calvator has a Chinese marking to prevent accidental, and has a red gum ring. Red rice NOTE9 5G version uses three cards and supports two NANO-SIM cards + a maximum 1TB microSD card expansion.
The rear shell is fixed by a buckle mode. After opening the rear shell, since the side fingerprint recognition soft plate is connected to the motherboard, the BTB connector is fixed using a metal steel sheet and a screw, resulting in a rear shell without direct removal. In addition, there is a small amount of foamed rubber between the rear shell and the camera cover, which is used to seal the gap between the rear shell and the rear imaging protective cover, and also has a certain dust.
In the rear shell, there is a foam, and the inner upper and lower parts are attached to the FPC antenna soft board. The buttons and fingerprint recognizers are fixed to the left and right sides.
The motherboard protective cover and the speaker share the 17 screws, two screws have a defense. The rear camera protective cover is integrated with the motherboard cover. The surface of the motherboard cover has a layer of graphite heat sink, and there is a shock absorbing cotton in the inner main camera.
Red rice NOTE9 5G version enclosed a sound cavity, the speaker module is provided by AAC Rui Sheng Technology, and there is a graphite tile with a layer of graphite heat. There is a PCB antenna plate with a coaxial connection.
The inside is three-stage assembly, and the surface of the motherboard is copper foil and graphite tiles. The 4 cameras are independent modules. 3 post-visual cameras are equipped with plastic positioning bracket base, including 2 camera BTB interface with steel sheets. Second fixation.
Be
There is a fixed screw on the motherboard, and the main sub-plate connection except for the cable above the battery, and there are 3 coaxial lines, which are fixed to the grooves on the right side. Although the motherboard shield has a copper foil and a graphite heat slicing, a material such as heat sink silicone is not found in the middle of the main board and the inner support. The USB interface and the headphone hole are equipped with a silicone dust jacket.
Red rice NOTE9 5G version of the battery adopts 2 easy germal solids, the battery has a rated capacity of 4900mAh, from Zhuhai Guanyu, model is BM54. Then then remove the earpiece, the independent light sensor assembly, linear motor. A silicone dust jacket is equipped with a silicone dust jacket on a separate light sensor assembly, and a copper foil is also attached to the soft board.
The top earpiece assembly is slightly larger than the general handset assembly, and the surface has a dustproof net and a small amount of foamed rubber. Integrated sound extension function, due to size limit, in the actual use process, the top sound and the bottom speaker are uneven.
Red rice NOTE9 5G version uses a 6.53-inch single digging hole IPS full screen, and there is a graphite tile between the screen and the inner support.
Summary:
Red rice NOTE9 5G version is a thousand yuan 5G mobile phone, workmanship and use feeling only can be relatively good, internal use three-stage design, unclear is very simple, which is conducive to repair. However, Note9 5G heat dissipation is more single, only on the front and back of the motherboard, copper foil or graphite sheet is disconnected on the camera base, and heat dissipation silicone is lacking.
It is better that the battery is equipped with a plastic film while the battery is used, and everyone knows that the easy-pull fracture is often found during dismantling, and the film can be utilized.
The above is this this time, the Redmi Note 9 5g dismantling sharing, Xiaobian thinks that Note 9 5G achieves 5G in thousands of yuan, although it is not "scalpered", but it is destined to sacrifice. For Redmi Note 9 5g, do you have different opinions, welcome to leave a message to discuss!
Above above Source: ewistech
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