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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
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4.17 Receiver Path
MSM6281 EAR1ON/EAR1OP → R300, R301 → Analog Switch(U300) → SPK600, SPK601 →
Receiver
Start
Conne ct the phone to network
Equipme nt and s etup c all
Setup 1 KHz tone out
NO
The sin e wave appears at
SPK_600, SPK_60
1
YES
NO
Can you he ar the tone ?
Change recei ver
YES
END
Change the Main boa rd
The sin e wave appears at
R300, R301?
Check th e analog switch
YES
NO
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