Samsung SM-F711B Service Manual page 58

6-5. Audio
6-5-4. Tx Voice mute
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3. Swap the SUB PBA to normal sample.
st
(For 1 mic)
- SUB PBA damaged
4. if there was a no sound in 1st mic
loopback test, swap the PBA to a normal
sample.
- AP damaged.
CONFIDENTIAL