Table of Contents
Advertisement
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
Connect the phone to network
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Start
Equipment and setup call
Setup 1KHz tone out
Hear the tone to the receiver?
NO
Change the Receiver
The sine wave appear at
C225,C226?
YES
The sine wave appear at
R211,C212?
YES
The sine wave appear at
R100,R101 of LCD FPCB?
NO
Check connector pin
or change the LCD FPCB
Can you hear the tone?
YES
END
- 127 -
4. TROUBLE SHOOTING
YES
END
NO
Change the Main board
NO
Check the U202 or
Change the Main board
YES
Check the pads of Receiver
LGE Internal Use Only
Advertisement
Table of Contents
