Sony Xpreia acro S Working Instructions page 125

Problem Areas: Keys
3. If the FPC or the BtB connector of PBA Flex Module is
damaged – replace the PBA Flex Module.
4. If the BtB connector on the PBA is damaged – replace
PBA.
1267-1086 Rev 2
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Sony Mobile Communications AB – Company Internal
Troubleshooting Guide (mech)
13(72)