Sony Xperia Z3 Troubleshooting Manual page 17

Problem Areas: Speaker
3. If the contact pads on the Relay FPC are damaged -
replace the Relay FPC.
Check:
Inspect the BtB connector of Relay FPC to Main PBA.
Action:
1. If not properly connected – disconnect and reconnect it.
2. If dirty or oxidized – clean it.
3. If the Relay FPC is damaged – replace it.
4. Replace Main PBA.
1288-9441 Rev 2
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Sony Mobile Communications AB – Company Internal
Troubleshooting Guide (mech)
17(59)