Blu Dash JR, Руководство по обслуживанию

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4.During a call cannot hear each other’s voices
No sound in REC
`
N
Check the connection of receiver,damage or not Change Receiver
Y
N
Check All the individual components of Rec path
Re-welding it
Y
Re-welding or change U100
No sound in MIC
`
N
Check the connection of microphone,damage or not Change Mic
Y
N
Check All the individual components of MIC circuit Re-welding it
Y
Re-welding or change U100
5, Cannot power-on
Cannot power on
`
Check if it can be power on after redownloading
N
N
Check the power supply and the output of U100 Change U100 or Re-welding it
Y
Test C446 to check the 26M clk is ok or not
N
Change 26M crystal X0401 or re-welding U400
Y
N
Test the output of 32.768 crystal Change 32.768K crystal X200
Y
N
Check the wilding between U100 andU500 Re-welding or change it,then redownloading