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RH-128
Baseband Description and Troubleshooting
USB Interface Faults
1.
Check if the bottom insert of the mobile phone is well connected.
2.
Check if the COM of the computer is well connected and confirm the configuration of the COM
setting.
3.
Check the welding of the mobile phone connection, whether there is foreign impurity
4.
Check if the VBUS, D+, D- and etc. are in their normal status.
5.
Check if the USB over-Voltage IC works normally.
6.
Check the welding of CPU.
USB Interface Disabled Troubleshooting
COMPANY CONFIDENTIAL
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