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U8510-1 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 MSM7227. Include three function modules, baseband interface management
module MSM7227, power management module PM7540, RF IC RTR6285. According to functions,
U8510 can be divided into the baseband processing module (including CPU-U401 and Flash-U601),
power module (U201), RF transmitting module (U3801) and peripheral circuit.
2011-05-28
Huawei confidential. No spreading without permission.
Page 31 of 61
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