CHC i80 - Internal Storage Problem

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C60：
The Arrow point out the C60
2.3: Internal storage problem
Fault description:
The memory disk cannot be read when the receiver connected with the PC.
Detection Method&Solution:
（1）The USB data cable meets some problem and it also cannot connect with other
i80.
Please replace the USB data cable and have a try.
(2) PFC flexible circuit board faults.
If so, please re-install or replace the FPC flexible circuit board.
(3) The flash memory chip faults. Please detect voltage of FB13 when the power
supply and the common valve should be 3.3 V.