Sony Xperia S LT26i Troubleshooting Manual page 23

Problem Areas: Secondary Microphone
Check:
Inspect the Microphone's mesh port on the Rear Frame
Assy.
Action:
1. If clogged – clean the port.
2. If the Microphone's mesh port is damaged – replace the
Rear Frame Assy.
Check:
Inspect the BtB connector of PBA NFC to the main PBA.
Action:
1. If not properly connected – disconnect and reconnect.
2. If dirty or oxidized – clean both sides of the BtB
connector.
Check:
Inspect the PBA NFC.
Action:
1. If the PBA NFC or its BtB connector is damaged – replace
the PBA NFC.
2. Replace board.
1257-2931 Rev 6
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Sony Mobile Communications AB – Company Internal
Trouble Shooting Guide Repair Instruction Mechanical/
23(57)