LG KE990 Service Manual - Page 104
Audio trouble
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4. TROUBLE SHOOTING 4.11 Audio trouble 4.11.1 Receiver path Voice Receiver path as below: ESM6270 Ear1ON/Ear1OP → CN701(Touch FPCB connector) → Receiver Start Conne ct th e phone to n etw ork Equipm ent a nd setup c all Setup 1KHz tone out Hear the tone to the receiv er? NO Change t he Receiv er YES END Check c onnector pin or ch ang e th e Tou ch FPCB Can you hea r th e ton e? YES END Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes - 105 - LGE Internal Use Only
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 105 -
4.11 Audio trouble
4.11.1 Receiver path
Voice Receiver path as below:
ESM6270 Ear1ON/Ear1OP
→
CN701(Touch FPCB connector)
→
Receiver
Start
Conne ct th e phone to n etw ork
Equipm ent a nd setup c all
Setup 1KHz tone out
Can you hear the tone?
YES
END
Check connector pin
or change the Touch FPCB
YES
Change the Receiver
Hear the tone to the receiver
?
NO
END