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U8350 Maintenance Manual Basic Version V1.0
Internal
9
Trouble shootings of Common Faults
Before performing the following troubleshooting operations, ensure the software of the terminal is in
good condition and restored to default settings.
9.1 Principle Instruction
The main chip of system is MSM7225. Include three function modules, baseband interface management
module MSM7225, power management module PM7540, RF IC RTR6285
According to functions, U8350 can be divided into the baseband processing module (including
CPU-U401 and Flash-U601), power module (U201), RF transmitting module (U3801) and peripheral
circuit.
2011-05-18
Huawei confidential. No spreading without permission.
Page 32 of 68
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