OPPO A77 mobile phone disassembly analysis

For purchase report, please contact: Mams Consulting Wang Hao Tel Email: wangyi#memsconsulting.com(#换为@) OPPO A77 is a main smartphone for young people, equipped with Qualcomm clocked at 2.0GHz MSM8953 64-bit eight-core processor. Runs on the Color OS 3.1 operating system (customized based on Android 7.1) with a 5.5-inch 1920 x 1080 TFT screen. 4GB running memory, 64GB flash memory, support for maximum 128GB Micro SD card expansion, built-in 3200mAh lithium polymer battery, front 16 million pixel camera, rear 13 million pixel camera.

For the OPPO A77 smartphone screen, the A77 is equipped with a 5.5-inch 1920×1080 TFT screen with a viewing area of ​​121.5mm×68.6mm. Fingerprint recognition is installed in the middle of the bottom of the screen, which cannot be pressed, and the buttons on both sides are virtual buttons. The back cover of the fuselage is relatively simple, and the micro-slit antenna design makes the antenna more beautiful.

The OPPO A77 uses a three-card design card holder that supports simultaneous insertion of two nano SIM cards and one micro SD card. The front of the Cato has type and direction identification.

The OPPO A77 smartphone has a plastic buckle between the back cover and the body, and no screws are used. The back cover is made of PC material. FPC antennas are attached to the top and bottom of the back cover, and a large number of graphite stickers are attached to the middle for heat dissipation.

The 3200mAh lithium polymer battery has a voltage of 3.85V and is coated with a transparent adhesive tape on the inner support for easy removal and replacement.

The OPPO A77 smart phone body adopts a three-stage design, and the BTB interface is covered with a metal cover sheet to enhance the connection reliability.

The OPPO A77 smartphone motherboard and the USB interface are connected by a soft board, and the surface of the integrated speaker module is reinforced by a metal plate.

The OPPO A77 smartphone main board is fixed by screws between the sub board and the inner support. A graphite sticker is attached to the shield of the main board.

The OPPO A77 smartphone handset, vibrator, button soft board and light/distance sensor are attached to the inner support, and the speakers are connected to the sub board via a separate soft board.

The screen is separated from the inner support by heating on the heating table, and a heat-dissipating sticker is attached to the inner support for heat dissipation.

Remove the shield and you can see the IC on the OPPO A77 smartphone motherboard. Main IC on the front of the motherboard (below): Red: NXP-TFA9890A - Audio chip yellow: SAMSUNG-KMRH60014M-4GB memory + 64GB flash green: QUALCOMM-MSM8953-eight core processor chip

Main IC on the back of the motherboard (below): Red: QUALCOMM-WTR3925 - RF Transceiver Chip Yellow: RFMD-RF5422-RF Chip Green: QUALCOMM-PM18952 - Power Management Chip Blue: STMICROELECTRONICS-LIS3DH-Acceleration Sensor Chip Cyan: QUALCOMM-WCN3660B -WIFI/Bluetooth/FM/GPS chip

The Logic, Memory, PM, RF, and MEMS chip usage information used on the OPPO A77 smartphone motherboard is shown in the following table:

Summary: OPPO A77 uses a three-stage design inside, which is easy to disassemble. With a three-card design card holder, two nano SIM cards and one micro SD card are inserted at the same time. The back cover and the body are fastened with a buckle, and the FPC antenna is attached to the top and bottom of the back cover, and a large amount of graphite stickers are attached to the middle position for heat dissipation. The whole machine is fixed by 17 screws, which is reliable and stable. The 3200 mAh lithium polymer battery is bonded to the inner support with a transparent adhesive. The surface of the integrated speaker module is reinforced with a metal plate and connected to the sub-board through a separate flexible board. A heat-dissipating sticker is also attached between the screen and the inner support. Compared with the previous generation OPPO A57, in addition to the performance gap, the A77 uses a 1080P mainstream screen and the A57 is a relatively outdated 720P screen. In terms of design, the back of the A57 still uses a typical three-stage design, while the A77 uses a micro-slit antenna design that looks more rounded. Product technical analysis services: First: machine analysis report: product technology highlights, parameter information, packaging specifications, machine appearance, disassembly steps, motherboard / soft board analysis, battery / camera / display analysis, cost reference information. Two: IC device analysis report: package level analysis, device process analysis, material structure analysis, reliability / failure test. If you need to purchase the "OPPO A77 Smartphone" disassembly analysis report, as well as IC and MEMS device analysis report, please send an email to wangyi#memsconsulting.com (# replaced by @).