9.4.9 SD Card Interface
Circuit Principle Diagram
Circuit analysis:
T card connector is connected directly to the main chip, including memory data signal, CMD
signal, GND signal power in good faith,
Fault analysis and treatment process:
1. The first detection of the T card holder connector shrapnel is tilted, dirt etc.. To ensure
good contact connector and method.
2. check the T card hot plug detect whether the Pin is normal.
3.Multimeter is used to measure the memory seat power supply is normal.
4. these are normal, need to be replaced or welding of the main chip
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