LG KC910 Service Manual page 155

4. TROUBLE SHOOTING
LGE Internal Use Only
FB400 FB400
FB401 FB401 U400 (audio codec)
C722
C418, C414
Pads of Speaker
Main to FPCB Connector
Copyright © 2007 LG Electronics. Inc. All right reserved.
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FPCB Connector
Only for training and service purposes