U9200 Maintenance Manual
INTERNAL
(2012-06-13)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Page 40 of 80
9 Troubleshooting Common Problems
Before performing maintenance and repair, ensure that the failure is not caused by
environmental factors and incorrect phone settings.
It is recommended that you restore the phone to the factory defaults.
9.1 Architecture Introduction
Figure 9-1 shows the schematic diagram of the circuit of the U9200.
Figure 9-1
Schematic diagram of the circuit of the U9200
The U9200 is Huawei's first smartphone supporting the combination of application processor
(AP) and cellular modem. The U9200, based on the TI OMAP4 platform, is a bar-type
smartphone, with two ARM Cortex-A9 1.5 GB cores and two LPDDR2 ports, supporting dual
channels to improve system performance. The hardware architecture is comprised of three
parts: AP, modem, and RF module. OMAP4460 (AP) is a signal input/output unit, providing
ports to the keypad, LCD, microSD card, Bluetooth, and camera; TWL6040 is an audio
management chip, supporting encoding and decoding audio signals; XGOLD626 is a modem,
providing RF interfaces; RF Engine is an RF transceiver; BCM4330 is a Bluetooth/Wi-Fi/FM
transceiver chip; BCM4751 is a GPS receiver chip. The U9200 consists of boards, built-in
battery, and mechanical parts: Boards include the main board, upper FPC (HD1U9200LS),
lower FPC (HD1U9200L), LCD module, 1 M HD/8 M camera, and motor/MIC/SPK/REC;
mechanical parts include Touch Lens, shell B, shell C, microphone sound cavity, main
antenna, and GPS/Wi-Fi/Bluetooth antennas.
Figure 9-2 shows the block diagram of the U9200.
