Sony Xpreia acro S Working Instructions page 137

Problem Areas: Microphone
Action:
If the secondary microphone mesh dirty or damaged –
replace the Rear Cover Assy.
Note: Ensure the BtB connector of Battery is
disconnected in the following steps!
Check:
Inspect the secondary microphone on the PBA.
Action:
1. If dirty – clean it.
2. Replace PBA.
1267-1086 Rev 2
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Sony Mobile Communications AB – Company Internal
Troubleshooting Guide (mech)
25(72)