Service Excellence Beyond Imagination
SWA-CS Content Innovation
Microphone problem
Step
Check point
Result value
Defect point
1
Confirm the defect symptom
-
-
2
Check the microphone hole
Dust
Clean the hole
Normal
Go to the next step
3
Check the microphone rubber
Wrong insert
Re-insert
Normal
Go to the next step
4
Activate the speaker path
(*#0283#
→
Packet Loopback ON)
-
-
5
Check the voltage of C501
Notice. It should be measured when the
microphone path is activated on
1.8V
Go to the next step
If not the correct value
AUDIO CODEC(U502)
6
Check the signal of ZD509,ZD5510
Notice. It should be measured when the
microphone path is activated on
Same signal compared with a good
PBA
Microphone
If not the correct value
AUDIO CODEC(U502)
