At present, the mainstream brand flagship has been demolished, and Samsung S21 has also been analyzed. Xiaobian is actually the purple model, but because it cannot be activated, replacement, change to white, do not know if there is a small partner encountered such a situation.
Return to the topic, you can clearly see the long shorts of S21 when publishing, and we will find out which unexpected details will be found after dismantling. First review the configuration information, this dismantling is the 8GB RAM + 128GB ROM version of Samsung Galaxy S21, a treasure official flagship store is purchased, and the interpretation of dismantling analysis is dominated by dismantling equipment.
(Note: The cost is only the cost estimate of material, there is a lot of factors affecting the cost of components. It will have a certain difference in real material costs. And mobile phone pricing cannot be referenced by material value.)
Dismantle:
Take out the calorker, and the tunnel is waterproof, and there is a snap to fix the SIM card. S21 is a plastic rear cover, and the adhesive of the cover is not strong. After heating through the hot air gun, the rear cover can be opened with a crowder.
Remove the top antenna module, the bottom antenna module, the BTB metal cover and the NFC / wireless charging coil, where the antenna module is fixed by the screw, and the earpiece is attached to the red waterproof rubber ring, and is fixed to the antenna module by the gum. Decompose. In the Detail S21's BTB interface, the pair of metal cover is free of foam protection.
It can be noted here to pay attention to the cancellation of the millimeter wave antenna, and there is a groove on both sides of the whole machine, which is a millimeter wave antenna location of the US version S21.
Sub-board, antenna module, and rear cameras are fixed by screws. In the dismantling, you should pay more attention to the pre-camera around the front camera, it is more difficult to remove. Since the USB interface is supported as a hollow design, the silica collisher is used to protect the silica pad on the USB interface, and there is a red film waterproof at the interface.
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Motherboard heat dissipation mainly heatsink through the inner support, and is coated with blue thermally conductive silicone in the motherboard CPU & memory chip position.
There is a color temperature sensor on the back of the motherboard. The main purpose is to detect the color temperature of the environment when taking pictures, so that the image color is more accurate.
The battery is secured by a white gum, the adhesion is strong, and the battery is slightly deformed. After removing the battery, it can see the inner support of the fingerprint identification module portion is hollow.
Remove the antenna soft board, the vibrator, and button soft plate, where the antenna soft plate is fixed by the screw, the vibrator is fixed by the glue, and the buttons are fixed to support the groove in the groove.
Finally, by heating the screen and the internal support, the screen and the inner support are except for a circle of the cotton rubber, and the internal part is also posted with 3 double-sided adhesive, and the inner support front is used for large-scale stone ink. The whole machine is dissipated. The volume button soft plate is fixed to the internal support, and the power button soft plate is in the groove through the plastic card.
The fingerprint recognition is fixed to the back of the screen, which is more difficult to remove. The protocol from the mainstream of the domestic flagship machine is the screen of the top-scale optical fingerprint, and S21 is selected by the ultra-thin ultrasonic fingerprint recognition module.
S21 uses three-segment design, with a total of 26 screws, and no anti-punch label is not posted on the screw. However, the internal layout is clear, and the main difficulty of dismantling is that the front camera and the battery. Waterproofing, screen, back cover, button, USB interface, SIM card, handset, speaker, microphone, etc. are waterproof. The heat dissipation is mainly dissipated by several layers of graphite sheets under the motherboard.
E analysis
The S21 motherboard is designed with a double sheet. The two PCB plates are 2mm, and the large boards are mainly integrated with chips such as processors, memory, flash memory, power supplies, and sensors. The small board is a radio frequency chip, but two pieces. On the board, we did not find too many filters, mainly integrated in the chip.
Motherboard 1 The main IC:
QUALCOMM- SM8350 - Qualcomm Snapdragon 888 processor
Samsung- K3LK7K70BM-BGCP- 8GB LPDDR5
Samsung-kludG4UHDC-B0E1-128GB UFS 3.1
MURATA-KM0916083-WiFi / BT chip
NXP-PCA9468-battery charging chip
Cirrus logic-CS35L40-audio amplifier
NXP-SN100T-NFC control chip
IDT-P9320S-wireless power receiver
Main board 1 main IC (below):
QUALCOMM-PM8350-Power Management Chip
SAMSUNG-S2MPB02-Camera Power Management Chip
STMicroelectronics-LSM6DSO-gyroscope + accelerometer
Color temperature sensor
Microphone
AKM-AK09918C-electronic compass
Main board 2 main IC:
Qualcomm-SDR868-RF Transceiver
QUALCOMM-QPA5580-power amplifier
Skyworks-Sky77365-11-Power amplifier
Qorvo-front end module
Discussion S21 product sales selling points or on screens, cameras, processors. It is more excellent in waterproofing to dismantle it. However, the maximum problem of S21, the 3880mAh battery rated capacity, and 25W charging speed, which is seriously detached in the current mobile phone fast charge.
The above is the dismantling analysis of the Samsung S21, and more detailed BOM with the whole machine disassembly Report removable Ewistech Souche. In addition, the flagship machines of major brands should have everything.
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Reprinted from ewistech.
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