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Confidential
Troubleshooting
Sound Problem
Step.
Check point
Result value
Defect point
1
Confirm the defect symptom.
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2
*#0*#
→ speaker
No sound
Go to the next step
Normal
S/W or Settings
3
Replace the speaker
Solved
speaker
Not solved
Go to the next step
4
Activate the speaker path.
(*#0*#
→ Speaker)
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5
Check the signal at two of
speaker contacts.
(Using oscilloscope)
Notice : It should be measured when the
speaker path is activated on.
Same signal compared with a
good PBA
Go to step 6
No signal
Audio Codec (U8010)
6
Check if the SPK is contacted to PBA well, and
assemble the phone again.
Solved
Assembly error
Not solved
Go to step 3