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LG KE970 Service Manual page 84

Lg cell phone service manual
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START
Check microphone sound hole
Make a phone call then
R503 Mic. Bias come
from BBP?
Yes
70pin connector
combination
is good?
Yes
Signal comes out from
Microphone
Assemble
No
Check mic. Bias
No
Repair the damaged
part
No
- 85 -
5. Trouble shooting
line
Replace
microphone
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