LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
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4.15 Audio trouble
4.15.1 Receiver path
Voice Receiver path as below:
MSM6275A Ear1ON/Ear1OP
→
U202(audio codec)
→
CN201(b’d to b’d connector for LCD Module)
→
CN102(LCD b’d to b’d connector of LCD FPCB)
→
R100, R101
→
Receiver
Start
Change the Main board
NO
Connect the phone to network
Equipment and setup call
Setup 1KHz tone out
YES
The sine wave appear at
R100,R101 of LCD FPCB?
NO
Can you hear the tone?
YES
END
Check connector pin
or change the LCD FPCB
YES
Change the Receiver
Hear the tone to the receiver?
NO
END
The sine wave appear at
C225,C226?
The sine wave appear at
R211,C212?
Check the U202 or
Change the Main board
NO
YES
YES
Check the pads of Receiver
Содержание KS10
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