Sony Xperia TX LT29i Working Instructions page 101

Problem Areas: Earphone
Check:
Inspect the BtB connector of the RCV Flex FPC to the PBA.
Action:
1. If not properly connected – disconnect and reconnect.
2. If dirty or oxidized – clean it.
3. If the pads, the BtB connector or the FPC of the RCV Flex
FPC is damaged – replace the RCV Flex FPC.
4. Replace board.
1266-5087 Rev 1
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Sony Mobile Communications AB – Company Internal
Troubleshooting Guide (mech)
19(57)