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Only for training and service purposes
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4. TROUBLE SHOOTING
ʹΠΡΪΣΚΘΙΥ͑ι ͣͨ͑͡͡ͽ͑ͶΝΖΔΥΣΠΟΚΔΤ͑͟ͺΟΔ͑͑͟ͲΝΝ͑ΣΚΘΙΥ͑ΣΖΤΖΣΧΖΕ͑͟
ΟΝΪ͑ΗΠΣ͑ΥΣΒΚΟΚΟΘ͑ΒΟΕ͑ΤΖΣΧΚΔΖ͑ΡΦΣΡΠΤΖΤ
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
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CHECKING FLOW
2. TROUBLE SHOOTING
START
<Play any Sound file>
Check the Audio signal of
TP1, TP2. is it ok?
Check the Audio
signal
TP3, TP4. is it ok?
No
Yes
Re-soldering or
Replace TP5, TP6
Re download the board
Or Replace of U102(BaseBand
chip)
No
Check the Audio
signal
CN101. Is it ok?
No
Replace or Change
U202
Yes
Yes
Check the signal of
I2C CLK, DATA. Is it ok?
No
Yes
Replace or Change the FPCB
Speaker
Working well!!
The Sound is playing
through the Speaker?
No
Yes
Re-soldering or replace
speaker.