Domestic brand tablets have pressed the price to two thousand yuan, and the competition is very fierce. Last time I disassembled lenovo's small new Pad, today I disassembled the Xiaomi Pad, which has always been cost-effective, and eWisetech started with the basic version of the Xiaomi Pad 5 series.
With a price difference of 500 yuan, the Xiaomi Pad5 Pro is naturally inferior in configuration. As a productivity tool, it will be a bit insufficient, but as a daily audio and video entertainment, it is completely enough to meet the demand.
dismantle
Step 1: Open Pad 5:
Disassembly starts from the screen, after the heating table uses suction cups and crowbars to open the screen, the screen cable is fixed by screws and metal sheets, and the screen is removed after disconnecting the cable.
Graphite sheets are attached to the upper and lower ends of the back of the screen, corresponding to the top motherboard and bottom side plate positions. Foam is attached to the corresponding battery in the middle. The screws are labeled with tamper evident labels at the fixed position of the screen cables.
Step 2: Remove all the devices inside the Pad 5:
After unscrewing the screws and removing the 3 plastic covers on the top and sides of the plate, the overall layout of the plate is clear. The layout inside the tablet is very similar, with 2 speakers at the top + bottom, the motherboard at the top or top + side, the battery centered, and the secondary board at the bottom. The charging coil module is glued to a plastic cover plate for stylus charging.
Remove the main and secondary board cables, adapter flex boards, and keyboard connection contact cables. Then unscrew the motherboard and secondary board screws and remove the motherboard and secondary board. The keyboard is connected to the contact point part by glue.
Because the speaker softboard contacts are pressed under the motherboard and the secondary board, the speakers can only be removed after the motherboard secondary board is removed. A total of 4 speaker modules up and down are screw-fixed, and the speaker supplier is Goertek. There is black foam and conductive cloth on the back of the speaker.
Remove the top and bottom 2 microphone flex pads, the fingerprint recognition flex pad at the top, the volume key flint pad, and the 2 sensing flex pads and shrapnel pads on the side. Hall sensors are integrated on the induction flex board. Among them, the microphone flex board and the induction flex board are fixed by glue, the fingerprint recognition flex board and volume key flex board are stuck in the inner support groove, and the shrapnel board is fixed by screws.
The 2 batteries are fixed by double-sided adhesive, and the deformation is serious after disassembly of the double-sided adhesive.
Step 3: Separate the inner support from the back cover and complete the disassembly:
Finally, the inner support and plastic back cover are heated and separated, and the top third of the inner support back is covered with heat dissipative graphite sheets, and the remaining two-thirds is cushioned foam.
Xiaomi Pad5 machine with a total of 55 screws fixed, the layout inside the tablet is clean, after removing the screen layout is clear at a glance, of course, this is also convenient for later disassembly and maintenance. Most of the space inside the fuselage is occupied by batteries. In terms of heat dissipation, the surface of the fuselage shell and the back of the screen are pasted with a large area of graphite material, and the motherboard part is dissipated by graphite sheet + thermal grease. The heat dissipation coverage area is large.
E Analysis
The motherboard shield is covered with graphite sheets and the interior is coated with thermal grease at the processor & memory chip and power chip. A rear color temperature sensor is integrated on the back of the motherboard. In addition, the motherboard is close to the position of the fingerprint recognition module, and the auxiliary board is close to the USB Type-C interface, and the water detection label is attached, and these two positions are easy to enter the water at the opening.
Motherboard main IC (figure below):
1: Qualcomm- SM8150-AC-Qualcomm Snapdragon 860 processor
2: SK Hynix- H54GE6AYRHX270-6GB RAM
3: Samsung- KLUDG4UHDC-B0E1-128GB flash memory
4: Qualcomm-WCD9340-Audio decoder
5: Qualcomm-WCN3998-WiFi/BT chip
6: 4pcs Cirrus Logic -CS35L41B-audio amplifier
7: Lion Semiconductor-LN8000-battery fast charge chip
8: NanoSIC-WN8031F-Audio SOC
9: STMicroelectronics-LSM6DSO-Gyroscope + Accelerometer
10: AKM-AK09918C-Electronic compass
11: Color temperature sensor
Xiao e found the WN8031F audio soc chip of Hangzhou Micro-Nano in the Xiaomi Pad5, which is also the first time we found the chip of this manufacturer in the disassembly.
In addition, according to the small e statistics, nearly 10 domestic company devices were found in the whole machine, such as Howey Technology, Hangzhou Micro-nano, Shengbang Microelectronics, Huaxing Optoelectronics and other companies. The official website mentions that the Xiaomi screen is provided by a number of suppliers, and the small e-dismantling one is an 11-inch LCD screen using Huaxing Optoelectronics.
In summary, the positioning of the Xiaomi Pad5 is very clear, a tablet for audio-visual entertainment. Therefore, the quality of the screen and speakers is improved, and the processor only uses the Snapdragon 860 processor. In the dismantling, the internal structure of xiaomi pad is simple and clear, and the disassembly is relatively simple, which will facilitate later maintenance. In the process of dismantling and analysis, many domestic manufacturers have also emerged.