Sony Xpreia acro S Working Instructions page 174

Problem Areas: Network & Signal
Check:
Inspect the contact pad on the antenna assy and the contact
pin on the PBA.
Action:
1. If dirty or oxidized – clean the pad and pin.
2. If the pad is damaged – replace Rear Cover Assy.
3. Replace PBA.
1267-1086 Rev 2
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Sony Mobile Communications AB – Company Internal
Troubleshooting Guide (mech)
62(72)