Samsung Galaxy Grand 2 Repair Manual page 65

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