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TROUBLE SHOOTING
USB reading OK
F: NO BT
Check D001 is with 3.3V voltage
or not
YES
Check RX TX waveform is normal or
YES
BT connect ok
not
Check Q001 is with 3.3V voltage
NO
or not
YES
Check Q001，Q002
NO
Check R004,R005,CP001 or
CN001，IC111(on Main board),and
16PIN soft flat cable
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